James Calzia (Former Employee)
Science and Products
Earthquakes and faults in southern California (1970-2010) Earthquakes and faults in southern California (1970-2010)
The map depicts both active and inactive faults and earthquakes magnitude 1.5 to 7.3 in southern California (1970–2010). The bathymetry was generated from digital files from the California Department of Fish And Game, Marine Region, Coastal Bathymetry Project. Elevation data are from the U.S. Geological Survey National Elevation Database. Landsat satellite image is from fourteen Landsat...
Earthquakes and faults in the San Francisco Bay area (1970-2003) Earthquakes and faults in the San Francisco Bay area (1970-2003)
The map depicts both active and inactive faults and earthquakes magnitude 1.5 to 7.0 in the greater San Francisco Bay area. Twenty-two earthquakes magnitude 5.0 and greater are indicated on the map and listed chronologically in an accompanying table. The data are compiled from records from 1970-2003. The bathymetry was generated from a digital version of NOAA maps and hydrogeographic...
Mineral resources and resource potential map of the Pyramid Peak Roadless Area, Riverside County, California Mineral resources and resource potential map of the Pyramid Peak Roadless Area, Riverside County, California
The Pyramid Peak Roadless Area is underlain by mid-Cretaceous plutonic rocks (granite, granodiorite, and tonalite) that intrude metasedimentary rocks of the Desert Divide Group. The granodiorite grades eastward into strongly deformed mylonitic rocks mapped as part of the Santa Rosa mylonite zone. Metasedimentary rocks, orthogneiss, and anatexites of the Palm Canyon Complex were displaced...
Filter Total Items: 29
Geology of the Monte Blanco borate deposits, Furnace Creek Wash, Death Valley, California Geology of the Monte Blanco borate deposits, Furnace Creek Wash, Death Valley, California
The Monte Blanco borate deposits are located along the southern margin of Death Valley’s Furnace Creek Wash, south of Twenty Mule Team Canyon road in California. Topographic and geologic mapping by S. Muessig and F.M. Byers, Jr., in 1954 documented these deposits’ geologic settings, geometries, mineralogies, and chemical characteristics. They estimated borate resources at the time to be...
Authors
S.J. Muessig, W.M. Pennell, Jeffrey R. Knott, James P. Calzia
Exploring ends of eras in the eastern Mojave Desert: The road log Exploring ends of eras in the eastern Mojave Desert: The road log
No abstract available.
Authors
David M. Miller, G.A. Spaulding, R.E. Reynolds, James Calzia, M.E. Wells, Robert J. Fleck, S. Baltzer
Geology of the Greenwater Range, and the dawn of Death Valley, California—Field guide for the Death Valley Natural History Conference, 2013 Geology of the Greenwater Range, and the dawn of Death Valley, California—Field guide for the Death Valley Natural History Conference, 2013
Much has been written about the age and formation of Death Valley, but that is one—if not the last—chapter in the fascinating geologic history of this area. Igneous and sedimentary rocks in the Greenwater Range, one mountain range east of Death Valley, tell an earlier story that overlaps with the formation of Death Valley proper. This early story has been told by scientists who have...
Authors
J.P. Calzia, O.T. Ramo, Robert Jachens, Eugene Smith, Jeffrey Knott
Klamath Mountains Ecoregion: Chapter 13 in Status and trends of land change in the Western United States--1973 to 2000 Klamath Mountains Ecoregion: Chapter 13 in Status and trends of land change in the Western United States--1973 to 2000
The Klamath Mountains Ecoregion covers approximately 47,791 km2 (18,452 mi2) of the Klamath and Siskiyou Mountains of northern California and southern Oregon (fig. 1) (Omernik, 1987; U.S. Environmental Protection Agency, 1997). The ecoregion is flanked by the Coast Range Ecoregion to the west, the Southern and Central California Chaparral and Oak Woodlands Ecoregion to the south, the...
Authors
Benjamin M. Sleeter, James P. Calzia
Sonoran Basin and Range Ecoregion: Chapter 30 in Status and trends of land change in the Western United States--1973 to 2000 Sonoran Basin and Range Ecoregion: Chapter 30 in Status and trends of land change in the Western United States--1973 to 2000
The Sonoran Basin and Range Ecoregion covers approximately 116,364 km2 (44,928 mi2) of desert landscape in southeastern California and southwestern Arizona (fig. 1) (Omernik, 1987; U.S. Environmental Protection Agency, 1997). This ecoregion is bounded on the west by the Southern and Central California Chaparral and Oak Woodlands and the Southern California Mountains Ecoregions; on the...
Authors
James P. Calzia, Tamara S. Wilson
Miocene rapakivi granites in the southern Death Valley region, California, USA Miocene rapakivi granites in the southern Death Valley region, California, USA
Rapakivi granites in the southern Death Valley region, California, include the 12.4-Ma granite of Kingston Peak, the ca. 10.6-Ma Little Chief stock, and the 9.8-Ma Shoshone pluton. All of these granitic rocks are texturally zoned from a porphyritic rim facies, characterized by rapakivi textures and miarolitic cavities, to an equigranular aplite core. These granites crystallized from...
Authors
James P. Calzia, O.T. Ramo
Science and Products
Earthquakes and faults in southern California (1970-2010) Earthquakes and faults in southern California (1970-2010)
The map depicts both active and inactive faults and earthquakes magnitude 1.5 to 7.3 in southern California (1970–2010). The bathymetry was generated from digital files from the California Department of Fish And Game, Marine Region, Coastal Bathymetry Project. Elevation data are from the U.S. Geological Survey National Elevation Database. Landsat satellite image is from fourteen Landsat...
Earthquakes and faults in the San Francisco Bay area (1970-2003) Earthquakes and faults in the San Francisco Bay area (1970-2003)
The map depicts both active and inactive faults and earthquakes magnitude 1.5 to 7.0 in the greater San Francisco Bay area. Twenty-two earthquakes magnitude 5.0 and greater are indicated on the map and listed chronologically in an accompanying table. The data are compiled from records from 1970-2003. The bathymetry was generated from a digital version of NOAA maps and hydrogeographic...
Mineral resources and resource potential map of the Pyramid Peak Roadless Area, Riverside County, California Mineral resources and resource potential map of the Pyramid Peak Roadless Area, Riverside County, California
The Pyramid Peak Roadless Area is underlain by mid-Cretaceous plutonic rocks (granite, granodiorite, and tonalite) that intrude metasedimentary rocks of the Desert Divide Group. The granodiorite grades eastward into strongly deformed mylonitic rocks mapped as part of the Santa Rosa mylonite zone. Metasedimentary rocks, orthogneiss, and anatexites of the Palm Canyon Complex were displaced...
Filter Total Items: 29
Geology of the Monte Blanco borate deposits, Furnace Creek Wash, Death Valley, California Geology of the Monte Blanco borate deposits, Furnace Creek Wash, Death Valley, California
The Monte Blanco borate deposits are located along the southern margin of Death Valley’s Furnace Creek Wash, south of Twenty Mule Team Canyon road in California. Topographic and geologic mapping by S. Muessig and F.M. Byers, Jr., in 1954 documented these deposits’ geologic settings, geometries, mineralogies, and chemical characteristics. They estimated borate resources at the time to be...
Authors
S.J. Muessig, W.M. Pennell, Jeffrey R. Knott, James P. Calzia
Exploring ends of eras in the eastern Mojave Desert: The road log Exploring ends of eras in the eastern Mojave Desert: The road log
No abstract available.
Authors
David M. Miller, G.A. Spaulding, R.E. Reynolds, James Calzia, M.E. Wells, Robert J. Fleck, S. Baltzer
Geology of the Greenwater Range, and the dawn of Death Valley, California—Field guide for the Death Valley Natural History Conference, 2013 Geology of the Greenwater Range, and the dawn of Death Valley, California—Field guide for the Death Valley Natural History Conference, 2013
Much has been written about the age and formation of Death Valley, but that is one—if not the last—chapter in the fascinating geologic history of this area. Igneous and sedimentary rocks in the Greenwater Range, one mountain range east of Death Valley, tell an earlier story that overlaps with the formation of Death Valley proper. This early story has been told by scientists who have...
Authors
J.P. Calzia, O.T. Ramo, Robert Jachens, Eugene Smith, Jeffrey Knott
Klamath Mountains Ecoregion: Chapter 13 in Status and trends of land change in the Western United States--1973 to 2000 Klamath Mountains Ecoregion: Chapter 13 in Status and trends of land change in the Western United States--1973 to 2000
The Klamath Mountains Ecoregion covers approximately 47,791 km2 (18,452 mi2) of the Klamath and Siskiyou Mountains of northern California and southern Oregon (fig. 1) (Omernik, 1987; U.S. Environmental Protection Agency, 1997). The ecoregion is flanked by the Coast Range Ecoregion to the west, the Southern and Central California Chaparral and Oak Woodlands Ecoregion to the south, the...
Authors
Benjamin M. Sleeter, James P. Calzia
Sonoran Basin and Range Ecoregion: Chapter 30 in Status and trends of land change in the Western United States--1973 to 2000 Sonoran Basin and Range Ecoregion: Chapter 30 in Status and trends of land change in the Western United States--1973 to 2000
The Sonoran Basin and Range Ecoregion covers approximately 116,364 km2 (44,928 mi2) of desert landscape in southeastern California and southwestern Arizona (fig. 1) (Omernik, 1987; U.S. Environmental Protection Agency, 1997). This ecoregion is bounded on the west by the Southern and Central California Chaparral and Oak Woodlands and the Southern California Mountains Ecoregions; on the...
Authors
James P. Calzia, Tamara S. Wilson
Miocene rapakivi granites in the southern Death Valley region, California, USA Miocene rapakivi granites in the southern Death Valley region, California, USA
Rapakivi granites in the southern Death Valley region, California, include the 12.4-Ma granite of Kingston Peak, the ca. 10.6-Ma Little Chief stock, and the 9.8-Ma Shoshone pluton. All of these granitic rocks are texturally zoned from a porphyritic rim facies, characterized by rapakivi textures and miarolitic cavities, to an equigranular aplite core. These granites crystallized from...
Authors
James P. Calzia, O.T. Ramo