Mark R. Hudson, PhD
Mark Hudson is a Research Geologist with the Geosciences and Environmental Change Science Center
Over a long career with the U.S. Geological Survey, I have had to opportunity to conduct a variety of basic and applied research studies applying techniques from structural geology/tectonics, geologic mapping, paleomagnetism/rock magnetism, karst geology, and hydrogeology. These studies have been conducted in the Basin and Range, Rio Grande rift, and southern Rocky Mountains provinces of the West and the Ozark Plateaus-Ouachita Mountains provinces of the southern midcontinent.
Professional Experience
2001 - present, Project Chief and Research Geologist, U.S. Geological Survey; Denver, CO
1987 - 2000, Research Geologist, U.S. Geological Survey; Denver, CO
Education and Certifications
Colorado School of Mines, Golden, CO - Ph.D., 1988, major - Geology, minor - Geophysics
Colorado School of Mines, Golden, CO - M.S., 1983, major - Geology
Arkansas Tech University, Russellville, AR - B.S., 1980, major - Geology, minor - Mathematics
Science and Products
Regional survey of structural properties and cementation patterns of fault zones in the northern part of the Albuquerque Basin, New Mexico - Implications for ground-water flow
Geologic and Hydrogeologic Framework of the Espanola Basin -- Proceedings of the 3rd Annual Espanola Basin Workshop, Santa Fe, New Mexico, March 2-3, 2004
Geologic and Hydrogeologic Framework of the Espanola Basin -- Proceedings of the 2nd Annual Espanola Basin Workshop, Santa Fe, New Mexico, March 4-5, 2003
Evaporite tectonism in the lower Roaring Fork River valley, west-central Colorado
Eagle collapse center: Interpretation of evidence for late Cenozoic evaporite-related deformation in the Eagle River basin, Colorado
Style and age of late Oligocene-early Miocene deformation in the southern Stillwater Range, west central Nevada: Paleomagnetism, geochronology, and field relations
Geophysical framework of the southwestern Nevada volcanic field and hydrogeologic implications
Paleomagnetic evidence for counterclockwise rotation in a broad sinistral shear zone, Basin and Range Province, southeastern Nevada and southwestern Utah
Paleomagnetism and rotation constraints for the middle Miocene southwestern Nevada volcanic field
Source of anomalous magnetization in an area of hydrocarbon potential: Petrologic evidence from the Jurassic Preuss Sandstone, Wyoming-Idaho thrust belt
Summary of natural remanent magnetization, magnetic susceptibility, and density measurements from the Lake City caldera area, San Juan Mountains, Colorado
Paleomagnetic evidence for the timing of collapse and resurgence of the Lake City Caldera, San Juan Mountains, Colorado
Science and Products
- Science
- Data
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- Publications
Filter Total Items: 26
Regional survey of structural properties and cementation patterns of fault zones in the northern part of the Albuquerque Basin, New Mexico - Implications for ground-water flow
Motivated by the need to document and evaluate the types and variability of fault zone properties that potentially affect aquifer systems in basins of the middle Rio Grande rift, we systematically characterized structural and cementation properties of exposed fault zones at 176 sites in the northern Albuquerque Basin. A statistical analysis of measurements and observations evaluated four aspects oAuthorsScott A. Minor, Mark R. HudsonGeologic and Hydrogeologic Framework of the Espanola Basin -- Proceedings of the 3rd Annual Espanola Basin Workshop, Santa Fe, New Mexico, March 2-3, 2004
No abstract available.AuthorsMark R. HudsonGeologic and Hydrogeologic Framework of the Espanola Basin -- Proceedings of the 2nd Annual Espanola Basin Workshop, Santa Fe, New Mexico, March 4-5, 2003
No abstract available.AuthorsMark R. HudsonEvaporite tectonism in the lower Roaring Fork River valley, west-central Colorado
Evaporite tectonism in the lower Roaring Fork River valley in west-central Colorado has caused regional subsidence of a differentially downdropped area in the southern part of the Carbondale collapse center during the late Cenozoic. A prominent topographic depression coincides with this collapse area, and drainage patterns within the collapse area contrast sharply with those outside of it. MioceneAuthorsR. M. Kirkham, Randall K. Streufert, Michael J. Kunk, James R. Budahn, Mark R. Hudson, William J. PerryEagle collapse center: Interpretation of evidence for late Cenozoic evaporite-related deformation in the Eagle River basin, Colorado
Evaporite tectonism resulted in deformation and collapse over an area of ~2500 km2 that is referred to as the Eagle collapse center. The collapse center includes much of the Eagle and Colorado River drainage basins between Vail, Dotsero, and McCoy, Colorado. The volume loss of evaporitic rocks by dissolution in the collapse center is estimated to be nearly 1700 km33 . Before ca. 10 Ma, Miocene basAuthorsDavid J. Lidke, Mark R. Hudson, R. B. Scott, Ralph R. Shroba, Michael J. Kunk, W. J. Perry, R. M. Kirkham, James R. Budahn, R. K. Streufert, J.O. Stanley, B.L. WidmannStyle and age of late Oligocene-early Miocene deformation in the southern Stillwater Range, west central Nevada: Paleomagnetism, geochronology, and field relations
Paleomagnetic and geochronologic data combined with geologic mapping tightly restrict the timing and character of a late Oligocene to early Miocene episode of large magnitude extension in the southern Stillwater Range and adjacent regions of west central Nevada. The southern Stillwater Range was the site of an Oligocene to early Miocene volcanic center comprising (1) 28.3 to 24.3 Ma intracaldera aAuthorsMark R. Hudson, David John, James E. Conrad, Edwin H. McKeeGeophysical framework of the southwestern Nevada volcanic field and hydrogeologic implications
Gravity and magnetic data, when integrated with other geophysical, geological, and rock-property data, provide a regional framework to view the subsurface geology in the southwestern Nevada volcanic field. The region has been loosely divided into six domains based on structural style and overall geophysical character. For each domain, the subsurface tectonic and magmatic features that have been inAuthorsV. J. Grauch, David A. Sawyer, Chris J. Fridrich, Mark R. HudsonPaleomagnetic evidence for counterclockwise rotation in a broad sinistral shear zone, Basin and Range Province, southeastern Nevada and southwestern Utah
No abstract available.AuthorsMark R. Hudson, Joseph G. Rosenbaum, C. S. Grommé, R. B. Scott, P. D. RowleyPaleomagnetism and rotation constraints for the middle Miocene southwestern Nevada volcanic field
Middle Miocene rocks of the southwestern Nevada volcanic field (SWNVF) lie across the projection of the Walker Lane belt within the Basin and Range province and thus provide an interesting opportunity to test for late Cenozoic vertical-axis rotation. Paleomagnetic data from individual ash flow sheets document no significant relative vertical-axis rotation among localities within central SWNVF, anAuthorsMark R. Hudson, David A. Sawyer, Richard G. WarrenSource of anomalous magnetization in an area of hydrocarbon potential: Petrologic evidence from the Jurassic Preuss Sandstone, Wyoming-Idaho thrust belt
The Jurassic Preuss Sandstone, which crops out in the central part of the Wyoming-Idaho thrust belt on trend with a hydrocarbon-producing region to the south, has been previously identified as the source of anomalous magnetization in the area. Elsewhere, anomalous magnetization in sedimentary rocks near hydrocarbon accumulations has been attributed to hydrocarbon-engendered magnetic minerals, butAuthorsNeil S. Fishman, Richard L. Reynolds, Mark R. Hudson, Vito F. NuccioSummary of natural remanent magnetization, magnetic susceptibility, and density measurements from the Lake City caldera area, San Juan Mountains, Colorado
No abstract available.AuthorsV. J. Grauch, Mark R. HudsonPaleomagnetic evidence for the timing of collapse and resurgence of the Lake City Caldera, San Juan Mountains, Colorado
Rocks of the 23.1‐m.y.‐old Lake City caldera consist of the compositionally zoned Sunshine Peak Tuff, postcollapse intracaldera lava flows, and resurgent quartz syenite intrusions. Declinations of reversely magnetized (I = −45° to −75°) Sunshine Peak Tuff change from easterly (D = 93°–130°) throughout most of the tuff to southerly (D = 195°–207°) within the late eruptive phases. The postcollapse lAuthorsRichard L. Reynolds, Mark R. Hudson, Ken Hon