Tracey Felger
Tracey is a Geologist with the Geology, Minerals, Energy, and Geophysics Science Center
Science and Products
Geologic Mapping of the Lower Colorado River System
This project is a comprehensive scientific investigation into the stratigraphic, structural, and geomorphic framework of the Grand Canyon and the lower Colorado River corridor. We are using multiscale surficial and bedrock geologic mapping in combination with stratigraphic, geochronologic, and geophysical studies to develop a stronger understanding of the of the river, its iconic landscapes, and...
Georectified mosaic of historical aerial photographs of the Colorado River in Palo Verde Valley, Arizona and California, acquired in 1930 Georectified mosaic of historical aerial photographs of the Colorado River in Palo Verde Valley, Arizona and California, acquired in 1930
This product is a georectified and tonally balanced mosaic of aerial photographs collected in 1930 by the U.S. Bureau of Reclamation along a portion of the floodplain of the Colorado River in Palo Verde Valley, Arizona and California. This dataset is a primary resource for the development of a surficial geologic map showing the floodplain and river channel characteristics along the...
Gravity and physical property data of the 2019 Ridgecrest earthquakes region, Mojave Desert, California Gravity and physical property data of the 2019 Ridgecrest earthquakes region, Mojave Desert, California
This data release presents point data associated with studies to understand the crustal structure of the 2019 Ridgecrest earthquakes epicentral region and the interaction of the northeast-to-east-striking Garlock fault with the northwest-striking faults of the Eastern California Shear Zone and Walker Lane. Data include principal fact information for new gravity measurements collected by...
Georectified mosaics of historical aerial photographs of the Colorado River in Parker Valley, Arizona and California, acquired in 1930, 1938, and 1947 Georectified mosaics of historical aerial photographs of the Colorado River in Parker Valley, Arizona and California, acquired in 1930, 1938, and 1947
The products provided here include four georectified mosaics of historic aerial photographs for the Parker Valley region within western Arizona and southeastern California. There are three individual mosaics from 1930, 1938, and 1947 covering different geographic areas. The fourth georectified mosaic is a composite of the three and covers the entire area of interest. These datasets were...
Georectified mosaic of historical aerial photographs of the Colorado River in Mohave Valley, Arizona, California, and Nevada, acquired in 1938 Georectified mosaic of historical aerial photographs of the Colorado River in Mohave Valley, Arizona, California, and Nevada, acquired in 1938
This product is a georectified and tonally balanced mosaic of aerial photographs collected in 1938 by the U.S. Bureau of Reclamation along the floodplain of the Colorado River in Mohave Valley region of Arizona, California and Nevada. This dataset is a primary resource for the development of a geologic map showing the floodplain and river channel characteristics along the Colorado River...
Database for the Geologic Map of the Katmai Volcanic Cluster, Katmai National Park, Alaska Database for the Geologic Map of the Katmai Volcanic Cluster, Katmai National Park, Alaska
A database of the geologic map of the Katmai Volcanic Cluster as described in the original abstract: This digital publication contains all the geologic map information used to publish U.S. Geological Survey Geologic Investigations Map Series I-2778 (Hildreth and Fierstein, 2003). This is a geologic map of the Katmai volcanic cluster on the Alaska Peninsula (including Mount Katmai...
Digital database for the geologic map of the Vidal, California, and Parker SW, California-Arizona quadrangles Digital database for the geologic map of the Vidal, California, and Parker SW, California-Arizona quadrangles
This geologic database is a digitized version of the original 1:24,000-scale analog geologic map titled "Geologic map of the Vidal, California, and Parker SW, California-Arizona quadrangles", published by the U.S. Geological Survey (USGS) in 1980. The map area straddles the Arizona-California border, and is located approximately 9.0 km (5.6 mi) west-southwest of Parker, CA, immediately...
Digital database for the geologic map of the Parker NW, Parker, and parts of the Whipple Mountains SW and Whipple Wash quadrangles, California and Arizona Digital database for the geologic map of the Parker NW, Parker, and parts of the Whipple Mountains SW and Whipple Wash quadrangles, California and Arizona
This geologic database is a digitized version of the 1:24,000-scale original analog geologic map titled "Geologic map of the Parker NW, Parker, and parts of the Whipple Mountains SW and Whipple Wash quadrangles, California and Arizona", published by the U.S. Geological Survey (USGS) in 1980. The map area straddles the Arizona-California border and includes the community of Parker, AZ...
Digital database of geologic units, contacts, and faults for Mineral Resource Potential Map of the Turtle Mountains Wilderness Study Area, San Bernardino County, California (U.S. Geological Survey Bulletin 1713-B, 1988, Plate 1) Digital database of geologic units, contacts, and faults for Mineral Resource Potential Map of the Turtle Mountains Wilderness Study Area, San Bernardino County, California (U.S. Geological Survey Bulletin 1713-B, 1988, Plate 1)
This map geodatabase digitally represents the general distribution of bedrock geologic map units in the Turtle Mountains area, California, as portrayed in Plate 1 of USGS Bulletin 1713-B, Mineral resources of the Turtle Mountains Wilderness Study Area, San Bernardino County, California (1988), https://doi.org/10.3133/b1713B. The map covers parts of the Rice, Turtle Mountains, and Savahia...
Geologic map of the Castle Rock 7.5' quadrangle, Arizona and California Geologic map of the Castle Rock 7.5' quadrangle, Arizona and California
The Castle Rock quadrangle is in the northeast corner of Chemehuevi Valley, California and Arizona. It includes the Colorado River’s entrance to the valley at the mouth of Topock Gorge and the northern outskirts of Lake Havasu City, Arizona, and the Chemehuevi Indian Tribe community of Havasu Lake, California. The map includes large parts of the Chemehuevi Indian Reservation and the...
Geologic map of the Fredonia 30' x 60' quadrangle, Mohave and Coconino counties, northern Arizona Geologic map of the Fredonia 30' x 60' quadrangle, Mohave and Coconino counties, northern Arizona
This geologic map is the result of a cooperative effort of the U.S. Geological Survey, the National Park Service, the U.S. Forest Service, and the Bureau of Land Management (BLM) and the Kaibab-Paiute Tribe to provide a regional geologic database for resource management officials of all government and agencies, city municipalities, private enterprises, and individuals of this part of the...
Geologic map of Wupatki National Monument and vicinity, Coconino County, Northern Arizona Geologic map of Wupatki National Monument and vicinity, Coconino County, Northern Arizona
Introduction The geologic map of Wupatki National Monument is a cooperative effort between the U.S. Geological Survey, the National Park Service, and the Navajo Nation to provide geologic information for resource management officials of the National Park Service, U.S. Forest Service, Navajo Indian Reservation (herein the Navajo Nation), and visitor information services at Wupatki...
Geologic map of the Cameron 30' x 60' quadrangle, Coconino County, northern Arizona Geologic map of the Cameron 30' x 60' quadrangle, Coconino County, northern Arizona
This geologic map is the result of a cooperative effort of the U.S. Geological Survey and the National Park Service in collaboration with the Navajo Nation and the Hopi Tribe to provide regional geologic information for resource management officials of the National Park Service, U.S. Forest Service, Navajo Indian Reservation (herein the Navajo Nation), the Hopi Tribe, and for visitor...
Geologic map of the Valle 30' x 60' quadrangle, Coconino County, northern Arizona Geologic map of the Valle 30' x 60' quadrangle, Coconino County, northern Arizona
The geologic map of the Valle 30' x 60' quadrangle is the result of a cooperative effort between the U.S. Geological Survey and the National Park Service to provide geologic information for regional resource management and visitor information services for Grand Canyon National Park, Arizona. The map area encompasses approximately 1,960 sq.mi. within Coconino County, northern Arizona and...
Geologic Map of Pipe Spring National Monument and the Western Kaibab-Paiute Indian Reservation, Mohave County, Arizona Geologic Map of Pipe Spring National Monument and the Western Kaibab-Paiute Indian Reservation, Mohave County, Arizona
The digital map publication, compiled from previously published and unpublished data and new mapping by the author, represents the general distribution of surficial and bedrock geology in Pipe Spring National Monument and vicinity, including the following 1:24,000-scale U.S. Geological Survey (USGS) quadrangles: Moccasin, Kaibab, Pipe Valley, and Pipe Spring. Together with the...
Surficial Geologic Map of The Loop and Druid Arch Quadrangles, Canyonlands National Park, Utah Surficial Geologic Map of The Loop and Druid Arch Quadrangles, Canyonlands National Park, Utah
This geologic map is a product of a cooperative project between the U.S. Geological Survey and the U.S. National Park Service to provide geologic information about this part of Canyonlands National Park, Utah. This digital map database contains bedrock data from previously published data that has been modified by the author. New mapping of the surficial dep
Filter Total Items: 16
Strike-slip faulting and counterclockwise rotations along the southwest portion of the Lake Mead fault system, Boulder City–Hoover Dam Area, Nevada Strike-slip faulting and counterclockwise rotations along the southwest portion of the Lake Mead fault system, Boulder City–Hoover Dam Area, Nevada
No abstract available.
Authors
L. Beard, Zachary Anderson, Tracey Felger
Post-Early Miocene silicic volcanism in the northern Mojave Desert, California Post-Early Miocene silicic volcanism in the northern Mojave Desert, California
Silicic volcanism that postdates widespread early Miocene volcanism in the Mojave Desert is underappreciated. We compiled age, petrographic, and geochemical data for volcanic rocks in a wide swath of the desert south of the Garlock fault using an age threshold of post-18.8 Ma, approximately the limit of the earlier Miocene volcanism as marked by the eruption of the widespread Peach...
Authors
David M. Miller, Phillip Gans, Tracey Felger, Jorge Vazquez
Geologic and geophysical maps of the Newfoundland Mountains and part of the adjacent Wells 30' x 60' quadrangles, Box Elder County, Utah Geologic and geophysical maps of the Newfoundland Mountains and part of the adjacent Wells 30' x 60' quadrangles, Box Elder County, Utah
The Newfoundland Mountains map area (Newfoundland Mountains and adjacent part of Wells 30' x 60' quadrangles) is located in Box Elder County, northwestern Utah. The map encompasses broad expanses of the Great Salt Lake Desert as well as several picturesque mountain ranges (figures 1, 2, and 3). The geology of the area was last mapped and summarized by Doelling (1980). Since that landmark...
Authors
David M. Miller, Tracey Felger, Victoria E. Langenheim
Attribute rules and dictionary symbology in ArcGIS Pro help streamline geologic map compilation in GeMS Attribute rules and dictionary symbology in ArcGIS Pro help streamline geologic map compilation in GeMS
Attribute rules and dictionary symbology are functionality available in ArcGIS Pro that can dramatically streamline the compilation of geologic maps in GeMS - the Geologic Map Schema that is the standard delivery schema mandated for projects funded by the Cooperative Geologic Mapping Program. Testing of the functionality produced attribute rules and a symbol dictionary that support two...
Authors
Tracey Felger
Insights into post-Miocene uplift of the western margin of the Colorado Plateau from the stratigraphic record of the lower Colorado River Insights into post-Miocene uplift of the western margin of the Colorado Plateau from the stratigraphic record of the lower Colorado River
The spatial and temporal distribution of Pliocene to Holocene Colorado River deposits (southwestern USA and northwestern Mexico) form a primary data set that records the evolution of a continental-scale river system and helps to delineate and quantify the magnitude of regional deformation. We focus in particular on the age and distribution of ancestral Colorado River deposits from field...
Authors
Ryan Crow, Keith Howard, L. Beard, Phil Pearthree, Kyle House, Karl Karlstrom, Lisa Peters, William McIntosh, Colleen Cassidy, Tracey Felger, Debra Block
The Colorado River and its deposits downstream from Grand Canyon in Arizona, California, and Nevada The Colorado River and its deposits downstream from Grand Canyon in Arizona, California, and Nevada
Understanding the evolution of the Colorado River system has direct implications for (1) the processes and timing of continental-scale river system integration, (2) the formation of iconic landscapes like those in and around Grand Canyon, and (3) the availability of groundwater resources. Spatial patterns in the position and type of Colorado River deposits, only discernible through...
Authors
Ryan Crow, Debra Block, Tracey Felger, Kyle House, Philip Pearthree, Brian Gootee, Ann Youberg, Keith Howard, L. Beard
Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW Quadrangles, Box Elder County, Utah Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW Quadrangles, Box Elder County, Utah
The Kelton Pass SE and Monument Peak SW 7.5' quadrangles are located in Box Elder County, northwestern Utah (figure 1; plate 1). The northern boundary of the map area is 8.5 miles (13.7 km) south of the Utah-Idaho border, and the southern boundary reaches the edge of mud flats at the north end of Great Salt Lake. Elevations range from 4218 feet (1286 m) along the mud flats to 5078 feet...
Authors
Tracey Felger, David M. Miller, Victoria E. Langenheim, Robert Fleck
Geologic framework of thermal springs, Black Canyon, Nevada and Arizona Geologic framework of thermal springs, Black Canyon, Nevada and Arizona
Thermal springs in Black Canyon of the Colorado River, downstream of Hoover Dam, are important recreational, ecological, and scenic features of the Lake Mead National Recreation Area. This report presents the results from a U.S. Geological Survey study of the geologic framework of the springs. The study was conducted in cooperation with the National Park Service and funded by both the...
Authors
L. Beard, Zachary Anderson, Tracey Felger, Gustav Seixas
Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona
Thermal springs in Black Canyon of the Colorado River, downstream of Hoover Dam, are important recreational, ecological, and scenic features of the Lake Mead National Recreation Area. This report presents the results from a U.S. Geological Survey study of the geologic framework of the springs. The study was conducted in cooperation with the National Park Service and funded by both the...
Authors
Tracey Felger, L. Beard, Zachary Anderson, Robert Fleck, Joseph L. Wooden, Gustav Seixas
Progress report geologic map of the Grouse Creek 30' x 60' quadrangle, and Utah part of the Jackpot 30' x 60' quadrangle, Box Elder County, Utah, and Cassia County, Idaho (Year 3 of 4); Progress report geologic map of the Grouse Creek 30' x 60' quadrangle, and Utah part of the Jackpot 30' x 60' quadrangle, Box Elder County, Utah, and Cassia County, Idaho (Year 3 of 4);
No abstract available.
Authors
David M. Miller, Donald Clark, Michael Wells, Charles Oviatt, Tracey Felger, Victoria Todd
Geologic map of Lake Mead and surrounding regions, southern Nevada, southwestern Utah, and northwestern Arizona Geologic map of Lake Mead and surrounding regions, southern Nevada, southwestern Utah, and northwestern Arizona
Regional stratigraphic units and structural features of the Lake Mead region are presented as a 1:250,000 scale map, and as a Geographic Information System database. The map, which was compiled from existing geologic maps of various scales, depicts geologic units, bedding and foliation attitudes, faults and folds. Units and structural features were generalized to highlight the regional...
Authors
Tracey Felger, Sue Beard
Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii
INTRODUCTION The area covered by this map includes parts of four U.S. Geological Survey (USGS) 7.5' topographic quadrangles (Kilauea Crater, Volcano, Ka`u Desert, and Makaopuhi). It encompasses the summit, upper rift zones, and Koa`e Fault System of Kilauea Volcano and a part of the adjacent, southeast flank of Mauna Loa Volcano. The map is dominated by products of eruptions from Kilauea...
Authors
Dillon Dutton, David Ramsey, Peggy Bruggman, Tracey Felger, Ellen Lougee, Sandy Margriter, Patrick Showalter, Christina A. Neal, John Lockwood
Science and Products
Geologic Mapping of the Lower Colorado River System
This project is a comprehensive scientific investigation into the stratigraphic, structural, and geomorphic framework of the Grand Canyon and the lower Colorado River corridor. We are using multiscale surficial and bedrock geologic mapping in combination with stratigraphic, geochronologic, and geophysical studies to develop a stronger understanding of the of the river, its iconic landscapes, and...
Georectified mosaic of historical aerial photographs of the Colorado River in Palo Verde Valley, Arizona and California, acquired in 1930 Georectified mosaic of historical aerial photographs of the Colorado River in Palo Verde Valley, Arizona and California, acquired in 1930
This product is a georectified and tonally balanced mosaic of aerial photographs collected in 1930 by the U.S. Bureau of Reclamation along a portion of the floodplain of the Colorado River in Palo Verde Valley, Arizona and California. This dataset is a primary resource for the development of a surficial geologic map showing the floodplain and river channel characteristics along the...
Gravity and physical property data of the 2019 Ridgecrest earthquakes region, Mojave Desert, California Gravity and physical property data of the 2019 Ridgecrest earthquakes region, Mojave Desert, California
This data release presents point data associated with studies to understand the crustal structure of the 2019 Ridgecrest earthquakes epicentral region and the interaction of the northeast-to-east-striking Garlock fault with the northwest-striking faults of the Eastern California Shear Zone and Walker Lane. Data include principal fact information for new gravity measurements collected by...
Georectified mosaics of historical aerial photographs of the Colorado River in Parker Valley, Arizona and California, acquired in 1930, 1938, and 1947 Georectified mosaics of historical aerial photographs of the Colorado River in Parker Valley, Arizona and California, acquired in 1930, 1938, and 1947
The products provided here include four georectified mosaics of historic aerial photographs for the Parker Valley region within western Arizona and southeastern California. There are three individual mosaics from 1930, 1938, and 1947 covering different geographic areas. The fourth georectified mosaic is a composite of the three and covers the entire area of interest. These datasets were...
Georectified mosaic of historical aerial photographs of the Colorado River in Mohave Valley, Arizona, California, and Nevada, acquired in 1938 Georectified mosaic of historical aerial photographs of the Colorado River in Mohave Valley, Arizona, California, and Nevada, acquired in 1938
This product is a georectified and tonally balanced mosaic of aerial photographs collected in 1938 by the U.S. Bureau of Reclamation along the floodplain of the Colorado River in Mohave Valley region of Arizona, California and Nevada. This dataset is a primary resource for the development of a geologic map showing the floodplain and river channel characteristics along the Colorado River...
Database for the Geologic Map of the Katmai Volcanic Cluster, Katmai National Park, Alaska Database for the Geologic Map of the Katmai Volcanic Cluster, Katmai National Park, Alaska
A database of the geologic map of the Katmai Volcanic Cluster as described in the original abstract: This digital publication contains all the geologic map information used to publish U.S. Geological Survey Geologic Investigations Map Series I-2778 (Hildreth and Fierstein, 2003). This is a geologic map of the Katmai volcanic cluster on the Alaska Peninsula (including Mount Katmai...
Digital database for the geologic map of the Vidal, California, and Parker SW, California-Arizona quadrangles Digital database for the geologic map of the Vidal, California, and Parker SW, California-Arizona quadrangles
This geologic database is a digitized version of the original 1:24,000-scale analog geologic map titled "Geologic map of the Vidal, California, and Parker SW, California-Arizona quadrangles", published by the U.S. Geological Survey (USGS) in 1980. The map area straddles the Arizona-California border, and is located approximately 9.0 km (5.6 mi) west-southwest of Parker, CA, immediately...
Digital database for the geologic map of the Parker NW, Parker, and parts of the Whipple Mountains SW and Whipple Wash quadrangles, California and Arizona Digital database for the geologic map of the Parker NW, Parker, and parts of the Whipple Mountains SW and Whipple Wash quadrangles, California and Arizona
This geologic database is a digitized version of the 1:24,000-scale original analog geologic map titled "Geologic map of the Parker NW, Parker, and parts of the Whipple Mountains SW and Whipple Wash quadrangles, California and Arizona", published by the U.S. Geological Survey (USGS) in 1980. The map area straddles the Arizona-California border and includes the community of Parker, AZ...
Digital database of geologic units, contacts, and faults for Mineral Resource Potential Map of the Turtle Mountains Wilderness Study Area, San Bernardino County, California (U.S. Geological Survey Bulletin 1713-B, 1988, Plate 1) Digital database of geologic units, contacts, and faults for Mineral Resource Potential Map of the Turtle Mountains Wilderness Study Area, San Bernardino County, California (U.S. Geological Survey Bulletin 1713-B, 1988, Plate 1)
This map geodatabase digitally represents the general distribution of bedrock geologic map units in the Turtle Mountains area, California, as portrayed in Plate 1 of USGS Bulletin 1713-B, Mineral resources of the Turtle Mountains Wilderness Study Area, San Bernardino County, California (1988), https://doi.org/10.3133/b1713B. The map covers parts of the Rice, Turtle Mountains, and Savahia...
Geologic map of the Castle Rock 7.5' quadrangle, Arizona and California Geologic map of the Castle Rock 7.5' quadrangle, Arizona and California
The Castle Rock quadrangle is in the northeast corner of Chemehuevi Valley, California and Arizona. It includes the Colorado River’s entrance to the valley at the mouth of Topock Gorge and the northern outskirts of Lake Havasu City, Arizona, and the Chemehuevi Indian Tribe community of Havasu Lake, California. The map includes large parts of the Chemehuevi Indian Reservation and the...
Geologic map of the Fredonia 30' x 60' quadrangle, Mohave and Coconino counties, northern Arizona Geologic map of the Fredonia 30' x 60' quadrangle, Mohave and Coconino counties, northern Arizona
This geologic map is the result of a cooperative effort of the U.S. Geological Survey, the National Park Service, the U.S. Forest Service, and the Bureau of Land Management (BLM) and the Kaibab-Paiute Tribe to provide a regional geologic database for resource management officials of all government and agencies, city municipalities, private enterprises, and individuals of this part of the...
Geologic map of Wupatki National Monument and vicinity, Coconino County, Northern Arizona Geologic map of Wupatki National Monument and vicinity, Coconino County, Northern Arizona
Introduction The geologic map of Wupatki National Monument is a cooperative effort between the U.S. Geological Survey, the National Park Service, and the Navajo Nation to provide geologic information for resource management officials of the National Park Service, U.S. Forest Service, Navajo Indian Reservation (herein the Navajo Nation), and visitor information services at Wupatki...
Geologic map of the Cameron 30' x 60' quadrangle, Coconino County, northern Arizona Geologic map of the Cameron 30' x 60' quadrangle, Coconino County, northern Arizona
This geologic map is the result of a cooperative effort of the U.S. Geological Survey and the National Park Service in collaboration with the Navajo Nation and the Hopi Tribe to provide regional geologic information for resource management officials of the National Park Service, U.S. Forest Service, Navajo Indian Reservation (herein the Navajo Nation), the Hopi Tribe, and for visitor...
Geologic map of the Valle 30' x 60' quadrangle, Coconino County, northern Arizona Geologic map of the Valle 30' x 60' quadrangle, Coconino County, northern Arizona
The geologic map of the Valle 30' x 60' quadrangle is the result of a cooperative effort between the U.S. Geological Survey and the National Park Service to provide geologic information for regional resource management and visitor information services for Grand Canyon National Park, Arizona. The map area encompasses approximately 1,960 sq.mi. within Coconino County, northern Arizona and...
Geologic Map of Pipe Spring National Monument and the Western Kaibab-Paiute Indian Reservation, Mohave County, Arizona Geologic Map of Pipe Spring National Monument and the Western Kaibab-Paiute Indian Reservation, Mohave County, Arizona
The digital map publication, compiled from previously published and unpublished data and new mapping by the author, represents the general distribution of surficial and bedrock geology in Pipe Spring National Monument and vicinity, including the following 1:24,000-scale U.S. Geological Survey (USGS) quadrangles: Moccasin, Kaibab, Pipe Valley, and Pipe Spring. Together with the...
Surficial Geologic Map of The Loop and Druid Arch Quadrangles, Canyonlands National Park, Utah Surficial Geologic Map of The Loop and Druid Arch Quadrangles, Canyonlands National Park, Utah
This geologic map is a product of a cooperative project between the U.S. Geological Survey and the U.S. National Park Service to provide geologic information about this part of Canyonlands National Park, Utah. This digital map database contains bedrock data from previously published data that has been modified by the author. New mapping of the surficial dep
Filter Total Items: 16
Strike-slip faulting and counterclockwise rotations along the southwest portion of the Lake Mead fault system, Boulder City–Hoover Dam Area, Nevada Strike-slip faulting and counterclockwise rotations along the southwest portion of the Lake Mead fault system, Boulder City–Hoover Dam Area, Nevada
No abstract available.
Authors
L. Beard, Zachary Anderson, Tracey Felger
Post-Early Miocene silicic volcanism in the northern Mojave Desert, California Post-Early Miocene silicic volcanism in the northern Mojave Desert, California
Silicic volcanism that postdates widespread early Miocene volcanism in the Mojave Desert is underappreciated. We compiled age, petrographic, and geochemical data for volcanic rocks in a wide swath of the desert south of the Garlock fault using an age threshold of post-18.8 Ma, approximately the limit of the earlier Miocene volcanism as marked by the eruption of the widespread Peach...
Authors
David M. Miller, Phillip Gans, Tracey Felger, Jorge Vazquez
Geologic and geophysical maps of the Newfoundland Mountains and part of the adjacent Wells 30' x 60' quadrangles, Box Elder County, Utah Geologic and geophysical maps of the Newfoundland Mountains and part of the adjacent Wells 30' x 60' quadrangles, Box Elder County, Utah
The Newfoundland Mountains map area (Newfoundland Mountains and adjacent part of Wells 30' x 60' quadrangles) is located in Box Elder County, northwestern Utah. The map encompasses broad expanses of the Great Salt Lake Desert as well as several picturesque mountain ranges (figures 1, 2, and 3). The geology of the area was last mapped and summarized by Doelling (1980). Since that landmark...
Authors
David M. Miller, Tracey Felger, Victoria E. Langenheim
Attribute rules and dictionary symbology in ArcGIS Pro help streamline geologic map compilation in GeMS Attribute rules and dictionary symbology in ArcGIS Pro help streamline geologic map compilation in GeMS
Attribute rules and dictionary symbology are functionality available in ArcGIS Pro that can dramatically streamline the compilation of geologic maps in GeMS - the Geologic Map Schema that is the standard delivery schema mandated for projects funded by the Cooperative Geologic Mapping Program. Testing of the functionality produced attribute rules and a symbol dictionary that support two...
Authors
Tracey Felger
Insights into post-Miocene uplift of the western margin of the Colorado Plateau from the stratigraphic record of the lower Colorado River Insights into post-Miocene uplift of the western margin of the Colorado Plateau from the stratigraphic record of the lower Colorado River
The spatial and temporal distribution of Pliocene to Holocene Colorado River deposits (southwestern USA and northwestern Mexico) form a primary data set that records the evolution of a continental-scale river system and helps to delineate and quantify the magnitude of regional deformation. We focus in particular on the age and distribution of ancestral Colorado River deposits from field...
Authors
Ryan Crow, Keith Howard, L. Beard, Phil Pearthree, Kyle House, Karl Karlstrom, Lisa Peters, William McIntosh, Colleen Cassidy, Tracey Felger, Debra Block
The Colorado River and its deposits downstream from Grand Canyon in Arizona, California, and Nevada The Colorado River and its deposits downstream from Grand Canyon in Arizona, California, and Nevada
Understanding the evolution of the Colorado River system has direct implications for (1) the processes and timing of continental-scale river system integration, (2) the formation of iconic landscapes like those in and around Grand Canyon, and (3) the availability of groundwater resources. Spatial patterns in the position and type of Colorado River deposits, only discernible through...
Authors
Ryan Crow, Debra Block, Tracey Felger, Kyle House, Philip Pearthree, Brian Gootee, Ann Youberg, Keith Howard, L. Beard
Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW Quadrangles, Box Elder County, Utah Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW Quadrangles, Box Elder County, Utah
The Kelton Pass SE and Monument Peak SW 7.5' quadrangles are located in Box Elder County, northwestern Utah (figure 1; plate 1). The northern boundary of the map area is 8.5 miles (13.7 km) south of the Utah-Idaho border, and the southern boundary reaches the edge of mud flats at the north end of Great Salt Lake. Elevations range from 4218 feet (1286 m) along the mud flats to 5078 feet...
Authors
Tracey Felger, David M. Miller, Victoria E. Langenheim, Robert Fleck
Geologic framework of thermal springs, Black Canyon, Nevada and Arizona Geologic framework of thermal springs, Black Canyon, Nevada and Arizona
Thermal springs in Black Canyon of the Colorado River, downstream of Hoover Dam, are important recreational, ecological, and scenic features of the Lake Mead National Recreation Area. This report presents the results from a U.S. Geological Survey study of the geologic framework of the springs. The study was conducted in cooperation with the National Park Service and funded by both the...
Authors
L. Beard, Zachary Anderson, Tracey Felger, Gustav Seixas
Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona
Thermal springs in Black Canyon of the Colorado River, downstream of Hoover Dam, are important recreational, ecological, and scenic features of the Lake Mead National Recreation Area. This report presents the results from a U.S. Geological Survey study of the geologic framework of the springs. The study was conducted in cooperation with the National Park Service and funded by both the...
Authors
Tracey Felger, L. Beard, Zachary Anderson, Robert Fleck, Joseph L. Wooden, Gustav Seixas
Progress report geologic map of the Grouse Creek 30' x 60' quadrangle, and Utah part of the Jackpot 30' x 60' quadrangle, Box Elder County, Utah, and Cassia County, Idaho (Year 3 of 4); Progress report geologic map of the Grouse Creek 30' x 60' quadrangle, and Utah part of the Jackpot 30' x 60' quadrangle, Box Elder County, Utah, and Cassia County, Idaho (Year 3 of 4);
No abstract available.
Authors
David M. Miller, Donald Clark, Michael Wells, Charles Oviatt, Tracey Felger, Victoria Todd
Geologic map of Lake Mead and surrounding regions, southern Nevada, southwestern Utah, and northwestern Arizona Geologic map of Lake Mead and surrounding regions, southern Nevada, southwestern Utah, and northwestern Arizona
Regional stratigraphic units and structural features of the Lake Mead region are presented as a 1:250,000 scale map, and as a Geographic Information System database. The map, which was compiled from existing geologic maps of various scales, depicts geologic units, bedding and foliation attitudes, faults and folds. Units and structural features were generalized to highlight the regional...
Authors
Tracey Felger, Sue Beard
Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii Database for the Geologic Map of the Summit Region of Kilauea Volcano, Hawaii
INTRODUCTION The area covered by this map includes parts of four U.S. Geological Survey (USGS) 7.5' topographic quadrangles (Kilauea Crater, Volcano, Ka`u Desert, and Makaopuhi). It encompasses the summit, upper rift zones, and Koa`e Fault System of Kilauea Volcano and a part of the adjacent, southeast flank of Mauna Loa Volcano. The map is dominated by products of eruptions from Kilauea...
Authors
Dillon Dutton, David Ramsey, Peggy Bruggman, Tracey Felger, Ellen Lougee, Sandy Margriter, Patrick Showalter, Christina A. Neal, John Lockwood