David A Lindsey (Former Employee)
Science and Products
Filter Total Items: 64
Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA
Contingency table analysis of pebble lithology and roundness is an effective way to identify the source terrane of a drainage basin and to distinguish changes in basin size, piracy, tectonism, and other events. First, the analysis to terrace gravel deposited by the Huangshui River, northeastern Tibet Plateau, China, shows statistically contrasting pebble populations for the oldest...
Authors
X. Miao, D. Lindsey, Z. Lai, Xiuying Liu
40Ar/39Ar dates for the Spanish Peaks intrusions in south-central Colorado 40Ar/39Ar dates for the Spanish Peaks intrusions in south-central Colorado
A diverse suite of spatially and temporally juxtaposed igneous rocks ranging from alkaline lamprophyres to granites intruded south-central Colorado during late Oligocene and early Miocene time. In addition to the stocks of the East and West Spanish Peaks, there are three types of dikes exposed in the region, based on orientation: radial, subparallel (striking approximately east–west)...
Authors
B.S. Penn, David Lindsey
Precambrian Time - The Story of the Early Earth Precambrian Time - The Story of the Early Earth
The Precambrian is the least-understood part of Earth history, yet it is arguably the most important. Precambrian time spans almost nine-tenths of Earth history, from the formation of the Earth to the dawn of the Cambrian Period. It represents time so vast and long ago that it challenges all comprehension. The Precambrian is the time of big questions. How old is the Earth? How old are...
Authors
D. Lindsey
Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA
Clast populations in piedmont fluvial systems are products of complex histories that complicate provenance interpretation. Although pebble counts of lithology are widely used, the information provided by a pebble count has been filtered by a potentially large number of processes and circumstances. Counts of pebble lithology and roundness together offer more power than lithology alone for...
Authors
D. Lindsey, W. Langer, B. Van Gosen
Stratigraphy, lithology, and sedimentary features of Quaternary alluvial deposits of the South Platte River and some of its tributaries east of the Front Range, Colorado Stratigraphy, lithology, and sedimentary features of Quaternary alluvial deposits of the South Platte River and some of its tributaries east of the Front Range, Colorado
No abstract available.
Authors
David Lindsey, William Langer, Daniel Knepper
Stratigraphic studies in southwestern Montana and adjacent Idaho--lower Tertiary Anaconda Conglomerate and Mesoproterozoic Gunsight Formation Stratigraphic studies in southwestern Montana and adjacent Idaho--lower Tertiary Anaconda Conglomerate and Mesoproterozoic Gunsight Formation
No abstract available.
Authors
J. O’Neill, Russell Tysdal
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
Reconnaissance geologic map of the Sangre de Cristo Wilderness Study Area, south-central Colorado Reconnaissance geologic map of the Sangre de Cristo Wilderness Study Area, south-central Colorado
The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine the mineral values, if any, that may be present. Results must be made available to the public and to be submitted to the President and Congress. This report presents the results of geologic studies...
Reference section for the Minturn Formation (Middle Pennsylvanian), northern Sangre de Cristo Range, Custer County, Colorado Reference section for the Minturn Formation (Middle Pennsylvanian), northern Sangre de Cristo Range, Custer County, Colorado
This reference section of the Middle Pennsylvanian Minturn Formation was measured in the northern Sangre de Cristo Range; the section provides a basis for comparison with the type Minturn and with possibly equivalent strata elsewhere in southern Colorado. The name "Minturn" was first applied to strata of Middle Pennsylvanian age near the town of Minturn in central Colorado (Tweto, 1949...
Science and Products
Filter Total Items: 64
Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA
Contingency table analysis of pebble lithology and roundness is an effective way to identify the source terrane of a drainage basin and to distinguish changes in basin size, piracy, tectonism, and other events. First, the analysis to terrace gravel deposited by the Huangshui River, northeastern Tibet Plateau, China, shows statistically contrasting pebble populations for the oldest...
Authors
X. Miao, D. Lindsey, Z. Lai, Xiuying Liu
40Ar/39Ar dates for the Spanish Peaks intrusions in south-central Colorado 40Ar/39Ar dates for the Spanish Peaks intrusions in south-central Colorado
A diverse suite of spatially and temporally juxtaposed igneous rocks ranging from alkaline lamprophyres to granites intruded south-central Colorado during late Oligocene and early Miocene time. In addition to the stocks of the East and West Spanish Peaks, there are three types of dikes exposed in the region, based on orientation: radial, subparallel (striking approximately east–west)...
Authors
B.S. Penn, David Lindsey
Precambrian Time - The Story of the Early Earth Precambrian Time - The Story of the Early Earth
The Precambrian is the least-understood part of Earth history, yet it is arguably the most important. Precambrian time spans almost nine-tenths of Earth history, from the formation of the Earth to the dawn of the Cambrian Period. It represents time so vast and long ago that it challenges all comprehension. The Precambrian is the time of big questions. How old is the Earth? How old are...
Authors
D. Lindsey
Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA
Clast populations in piedmont fluvial systems are products of complex histories that complicate provenance interpretation. Although pebble counts of lithology are widely used, the information provided by a pebble count has been filtered by a potentially large number of processes and circumstances. Counts of pebble lithology and roundness together offer more power than lithology alone for...
Authors
D. Lindsey, W. Langer, B. Van Gosen
Stratigraphy, lithology, and sedimentary features of Quaternary alluvial deposits of the South Platte River and some of its tributaries east of the Front Range, Colorado Stratigraphy, lithology, and sedimentary features of Quaternary alluvial deposits of the South Platte River and some of its tributaries east of the Front Range, Colorado
No abstract available.
Authors
David Lindsey, William Langer, Daniel Knepper
Stratigraphic studies in southwestern Montana and adjacent Idaho--lower Tertiary Anaconda Conglomerate and Mesoproterozoic Gunsight Formation Stratigraphic studies in southwestern Montana and adjacent Idaho--lower Tertiary Anaconda Conglomerate and Mesoproterozoic Gunsight Formation
No abstract available.
Authors
J. O’Neill, Russell Tysdal
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
Reconnaissance geologic map of the Sangre de Cristo Wilderness Study Area, south-central Colorado Reconnaissance geologic map of the Sangre de Cristo Wilderness Study Area, south-central Colorado
The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine the mineral values, if any, that may be present. Results must be made available to the public and to be submitted to the President and Congress. This report presents the results of geologic studies...
Reference section for the Minturn Formation (Middle Pennsylvanian), northern Sangre de Cristo Range, Custer County, Colorado Reference section for the Minturn Formation (Middle Pennsylvanian), northern Sangre de Cristo Range, Custer County, Colorado
This reference section of the Middle Pennsylvanian Minturn Formation was measured in the northern Sangre de Cristo Range; the section provides a basis for comparison with the type Minturn and with possibly equivalent strata elsewhere in southern Colorado. The name "Minturn" was first applied to strata of Middle Pennsylvanian age near the town of Minturn in central Colorado (Tweto, 1949...