David A Lindsey (Former Employee)
Science and Products
Filter Total Items: 64
Sediment-hosted copper deposits of the world: Deposit models and database Sediment-hosted copper deposits of the world: Deposit models and database
Introduction This publication contains four descriptive models and four grade-tonnage models for sediment hosted copper deposits. Descriptive models are useful in exploration planning and resource assessment because they enable the user to identify deposits in the field and to identify areas on geologic and geophysical maps where deposits could occur. Grade and tonnage models are used in...
Authors
Dennis P. Cox, David A. Lindsey, Donald A. Singer, Barry C. Moring, Michael F. Diggles
Correlation, sedimentology, structural setting, chemical composition, and provenance of selected formations in Mesoproterozoic Lemhi Group, central Idaho Correlation, sedimentology, structural setting, chemical composition, and provenance of selected formations in Mesoproterozoic Lemhi Group, central Idaho
A unit of the Mesoproterozoic Apple Creek Formation of the Lemhi Range previously was correlated with part of the lower subunit of the Mesoproterozoic Yellowjacket Formation in the Salmon River Mountains. Strata currently assigned to the middle subunit of the Yellowjacket Formation lie conformably above the Apple Creek unit in the Salmon River Mountains, and are here renamed the banded...
Authors
Russell G. Tysdal, David A. Lindsey, Joseph E. Taggart
Geologic information for aggregate resource planning Geologic information for aggregate resource planning
Construction and maintenance of the infrastructure is dependent on such raw materials as aggregate (crushed stone, sand, and gravel). Despite this dependence, urban expansion often works to the detriment of the production of those essential raw materials. The failure to plan for the protection and extraction of aggregate resources often results in increased consumer cost, environmental...
Authors
William H. Langer, David A. Lindsey, Daniel H. Knepper
Geologic investigations in the Lake Valley area, Sierra County, New Mexico Geologic investigations in the Lake Valley area, Sierra County, New Mexico
At the request of the Bureau of Land Management, the U.S. Geological Survey evaluated the area of the historic Lake Valley mining district and townsite, Sierra County, New Mexico, for its potential for undiscovered mineral resources. The four chapters of this report describe the geology of the area, present the results of geophysical investigations carried out to aid in interpreting...
Authors
J.M. O’Neill, D. A. Lindsey, D. C. Hedlund, C.J. Nutt, J.C. Ratte, D. P. Klein, M. D. Kleinkopf, R. A. Wise, V. T. McLemore, J. R. Herring
Statistical tables and charts showing geochemical variation in the Mesoproterozoic Big Creek, Apple Creek, and Gunsight formations, Lemhi group, Salmon River Mountains and Lemhi Range, central Idaho Statistical tables and charts showing geochemical variation in the Mesoproterozoic Big Creek, Apple Creek, and Gunsight formations, Lemhi group, Salmon River Mountains and Lemhi Range, central Idaho
The principal purpose of this report is to provide a reference archive for results of a statistical analysis of geochemical data for metasedimentary rocks of Mesoproterozoic age of the Salmon River Mountains and Lemhi Range, central Idaho. Descriptions of geochemical data sets, statistical methods, rationale for interpretations, and references to the literature are provided. Three...
Authors
David A. Lindsey, Russell G. Tysdal, Joseph E. Taggart
Reconnaissance of alluvial fans as potential sources of gravel aggregate, Santa Cruz River valley, Southeast Arizona Reconnaissance of alluvial fans as potential sources of gravel aggregate, Santa Cruz River valley, Southeast Arizona
This investigation was conducted to provide information on the aggregate potential of alluvial fan sediments in the Santa Cruz River valley. Pebble lithology, roundness, and particle size were determined in the field, and structures and textures of alluvial fan sediments were photographed and described. Additional measurements of particle size on digital photographs were made on a...
Authors
David A. Lindsey, Roger Melick
Log for Joint SEPM-Colorado Scientific Society field trip, September 20-21, 1986: Late Paleozoic sedimentation and Laramide tectonics of the Sangre de Cristo Range, from Westcliffe to Crestone, Colorado Log for Joint SEPM-Colorado Scientific Society field trip, September 20-21, 1986: Late Paleozoic sedimentation and Laramide tectonics of the Sangre de Cristo Range, from Westcliffe to Crestone, Colorado
This trip will cross the northern Sangre de Cristo Range, from Westcliffe to Crestone, Colorado, by way of the Hermit Pass Road and the Rito Alto pack trail (Fig. 1 below; road and trail shown on Fig. 2). The traverse is designed to give the geologist a sample of the structure and stratigraphy of this part of the range. Emphasis will be on the relationship between the horst of the Sangre...
Authors
David A. Lindsey
Lithology of gravel deposits of the Front Range urban corridor, Colorado: data and multivariate statistical analysis Lithology of gravel deposits of the Front Range urban corridor, Colorado: data and multivariate statistical analysis
Pebble count data from Quaternary gravel deposits north of Denver, Colo., were analyzed by multivariate statistical methods to identify lithologic factors that might affect aggregate quality. The pebble count data used in this analysis were taken from the map by Colton and Fitch (1974) and are supplemented by data reported by the Front Range Infrastructure Resources Project. This report...
Authors
David A. Lindsey
Petrology of arkosic sandstones, Pennsylvanian Minturn Formation and Pennsylvanian and Permian Sangre de Cristo Formation, Sangre de Cristo Range, Colorado - data and preliminary interpretations Petrology of arkosic sandstones, Pennsylvanian Minturn Formation and Pennsylvanian and Permian Sangre de Cristo Formation, Sangre de Cristo Range, Colorado - data and preliminary interpretations
This report describes the mineral and chemical composition of immature, arkosic sandstones of the Pennsylvanian Minturn and Pennsylvanian and Permian Sangre de Cristo Formations, which were derived from the Ancestral Rocky Mountains. Located in the Sangre de Cristo Range of southern Colorado, the Minturn and Sangre de Cristo Formations contain some of the most immature, sodic arkoses...
Authors
D. A. Lindsey
Defining models and measuring aggregate quality for gravel deposits of the Front Range Urban Corridor, Colorado Defining models and measuring aggregate quality for gravel deposits of the Front Range Urban Corridor, Colorado
No abstract available.
Authors
David A. Lindsey, William H. Langer
Slides of the fluorspar, beryllium, and uranium deposits at Spor Mountain, Utah Slides of the fluorspar, beryllium, and uranium deposits at Spor Mountain, Utah
No abstract available.
Authors
David A. Lindsey
Non-USGS Publications**
Lindsey, David A., 1965, Studies of a Nebraskan(?) till: The Compass, v. 42, no. 2, p. 79-87.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Filter Total Items: 20
Measured sections and discussion of the main turbidite member, Middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache counties, Colorado Measured sections and discussion of the main turbidite member, Middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache counties, Colorado
Turbidites are sediments deposited by turbid density currents. The turbidites described here are interpreted as prodelta deposits that formed in front of fan deltas and alluvial fans during the uplift of the ancestral Rocky Mountains in Pennsylvanian time. Laterally extensive, lenticular sand bodies deposited by turbidity flows crop out in the Middle Pennsylvanian Minturn Formation in...
Science and Products
Filter Total Items: 64
Sediment-hosted copper deposits of the world: Deposit models and database Sediment-hosted copper deposits of the world: Deposit models and database
Introduction This publication contains four descriptive models and four grade-tonnage models for sediment hosted copper deposits. Descriptive models are useful in exploration planning and resource assessment because they enable the user to identify deposits in the field and to identify areas on geologic and geophysical maps where deposits could occur. Grade and tonnage models are used in...
Authors
Dennis P. Cox, David A. Lindsey, Donald A. Singer, Barry C. Moring, Michael F. Diggles
Correlation, sedimentology, structural setting, chemical composition, and provenance of selected formations in Mesoproterozoic Lemhi Group, central Idaho Correlation, sedimentology, structural setting, chemical composition, and provenance of selected formations in Mesoproterozoic Lemhi Group, central Idaho
A unit of the Mesoproterozoic Apple Creek Formation of the Lemhi Range previously was correlated with part of the lower subunit of the Mesoproterozoic Yellowjacket Formation in the Salmon River Mountains. Strata currently assigned to the middle subunit of the Yellowjacket Formation lie conformably above the Apple Creek unit in the Salmon River Mountains, and are here renamed the banded...
Authors
Russell G. Tysdal, David A. Lindsey, Joseph E. Taggart
Geologic information for aggregate resource planning Geologic information for aggregate resource planning
Construction and maintenance of the infrastructure is dependent on such raw materials as aggregate (crushed stone, sand, and gravel). Despite this dependence, urban expansion often works to the detriment of the production of those essential raw materials. The failure to plan for the protection and extraction of aggregate resources often results in increased consumer cost, environmental...
Authors
William H. Langer, David A. Lindsey, Daniel H. Knepper
Geologic investigations in the Lake Valley area, Sierra County, New Mexico Geologic investigations in the Lake Valley area, Sierra County, New Mexico
At the request of the Bureau of Land Management, the U.S. Geological Survey evaluated the area of the historic Lake Valley mining district and townsite, Sierra County, New Mexico, for its potential for undiscovered mineral resources. The four chapters of this report describe the geology of the area, present the results of geophysical investigations carried out to aid in interpreting...
Authors
J.M. O’Neill, D. A. Lindsey, D. C. Hedlund, C.J. Nutt, J.C. Ratte, D. P. Klein, M. D. Kleinkopf, R. A. Wise, V. T. McLemore, J. R. Herring
Statistical tables and charts showing geochemical variation in the Mesoproterozoic Big Creek, Apple Creek, and Gunsight formations, Lemhi group, Salmon River Mountains and Lemhi Range, central Idaho Statistical tables and charts showing geochemical variation in the Mesoproterozoic Big Creek, Apple Creek, and Gunsight formations, Lemhi group, Salmon River Mountains and Lemhi Range, central Idaho
The principal purpose of this report is to provide a reference archive for results of a statistical analysis of geochemical data for metasedimentary rocks of Mesoproterozoic age of the Salmon River Mountains and Lemhi Range, central Idaho. Descriptions of geochemical data sets, statistical methods, rationale for interpretations, and references to the literature are provided. Three...
Authors
David A. Lindsey, Russell G. Tysdal, Joseph E. Taggart
Reconnaissance of alluvial fans as potential sources of gravel aggregate, Santa Cruz River valley, Southeast Arizona Reconnaissance of alluvial fans as potential sources of gravel aggregate, Santa Cruz River valley, Southeast Arizona
This investigation was conducted to provide information on the aggregate potential of alluvial fan sediments in the Santa Cruz River valley. Pebble lithology, roundness, and particle size were determined in the field, and structures and textures of alluvial fan sediments were photographed and described. Additional measurements of particle size on digital photographs were made on a...
Authors
David A. Lindsey, Roger Melick
Log for Joint SEPM-Colorado Scientific Society field trip, September 20-21, 1986: Late Paleozoic sedimentation and Laramide tectonics of the Sangre de Cristo Range, from Westcliffe to Crestone, Colorado Log for Joint SEPM-Colorado Scientific Society field trip, September 20-21, 1986: Late Paleozoic sedimentation and Laramide tectonics of the Sangre de Cristo Range, from Westcliffe to Crestone, Colorado
This trip will cross the northern Sangre de Cristo Range, from Westcliffe to Crestone, Colorado, by way of the Hermit Pass Road and the Rito Alto pack trail (Fig. 1 below; road and trail shown on Fig. 2). The traverse is designed to give the geologist a sample of the structure and stratigraphy of this part of the range. Emphasis will be on the relationship between the horst of the Sangre...
Authors
David A. Lindsey
Lithology of gravel deposits of the Front Range urban corridor, Colorado: data and multivariate statistical analysis Lithology of gravel deposits of the Front Range urban corridor, Colorado: data and multivariate statistical analysis
Pebble count data from Quaternary gravel deposits north of Denver, Colo., were analyzed by multivariate statistical methods to identify lithologic factors that might affect aggregate quality. The pebble count data used in this analysis were taken from the map by Colton and Fitch (1974) and are supplemented by data reported by the Front Range Infrastructure Resources Project. This report...
Authors
David A. Lindsey
Petrology of arkosic sandstones, Pennsylvanian Minturn Formation and Pennsylvanian and Permian Sangre de Cristo Formation, Sangre de Cristo Range, Colorado - data and preliminary interpretations Petrology of arkosic sandstones, Pennsylvanian Minturn Formation and Pennsylvanian and Permian Sangre de Cristo Formation, Sangre de Cristo Range, Colorado - data and preliminary interpretations
This report describes the mineral and chemical composition of immature, arkosic sandstones of the Pennsylvanian Minturn and Pennsylvanian and Permian Sangre de Cristo Formations, which were derived from the Ancestral Rocky Mountains. Located in the Sangre de Cristo Range of southern Colorado, the Minturn and Sangre de Cristo Formations contain some of the most immature, sodic arkoses...
Authors
D. A. Lindsey
Defining models and measuring aggregate quality for gravel deposits of the Front Range Urban Corridor, Colorado Defining models and measuring aggregate quality for gravel deposits of the Front Range Urban Corridor, Colorado
No abstract available.
Authors
David A. Lindsey, William H. Langer
Slides of the fluorspar, beryllium, and uranium deposits at Spor Mountain, Utah Slides of the fluorspar, beryllium, and uranium deposits at Spor Mountain, Utah
No abstract available.
Authors
David A. Lindsey
Non-USGS Publications**
Lindsey, David A., 1965, Studies of a Nebraskan(?) till: The Compass, v. 42, no. 2, p. 79-87.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Filter Total Items: 20
Measured sections and discussion of the main turbidite member, Middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache counties, Colorado Measured sections and discussion of the main turbidite member, Middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache counties, Colorado
Turbidites are sediments deposited by turbid density currents. The turbidites described here are interpreted as prodelta deposits that formed in front of fan deltas and alluvial fans during the uplift of the ancestral Rocky Mountains in Pennsylvanian time. Laterally extensive, lenticular sand bodies deposited by turbidity flows crop out in the Middle Pennsylvanian Minturn Formation in...