Karl S Kellogg
My research focuses on the geologic evolution of the central Rocky Mountain region of Colorado, including the Colorado Front Range and the northern Rio Grande rift. I coordinated part of the USGS Rio Grande Basins project to map and study the geologic and tectonic history of the upper Arkansas River valley between Salida and Leadville, Colorado.
Biography
Education:
1966: B.A., University of California at Berkeley
1972: Ph.D., University of Colorado at Boulder
Honors, Service, and Academic Activities:
- Antarctic Service Medal (1979)
- Named geographical feature: Kellogg Glacier in Black Coast of Antarctic Peninsula (1984)
- Central Region Representative, National Geologic Mapping Program Council (1996-1997)
- EDMAP Advisory Panel, USGS Representative (1996-1997)
- President, Colorado Scientific Society (1996-1997)
- Department of Geological Sciences Advisory Board, University of Colorado, Boulder (1997-2002)
- Colorado Geologic Survey Advisory Council (1998-1998)
- Meritorious Achievement Award, USGS (2006)
Professional Society Memberships:
- Fellow, Geological Society of America
- American Geophysical Union
- Colorado Scientific Society
Earlier research involved detailed mapping and structural studies in the northern Front Range (Colorado), the Western Transverse Ranges and Santa Barbara coastal plain (Southern California), the Laramide province of southwestern Montana, the overthrust belt of southeastern Idaho, Mount St. Helens (Washington), the Pan-African Shield of western Saudi Arabia, and the Antarctic Peninsula and Ohio Range regions of Antarctica.
Science and Products
Geologic map of the eastern half of the Vail 30' x 60' quadrangle, Eagle, Summit, and Grand Counties, Colorado
Recent mapping and geochronologic studies for the eastern half of the Vail 1:100,000-scale quadrangle have significantly improved our understanding of (1) Paleoproterozoic history of the basement rocks of the Gore Range and Williams Fork Mountains (western margin of the Front Range), (2) the Late Paleozoic history of the Gore fault system, (3)...
Kellogg, Karl S.; Shroba, Ralph R.; Premo, Wayne R.; Bryant, Bruce
Structural development of high-temperature mylonites in the Archean Wyoming province, northwestern Madison Range, Montana
The Crooked Creek mylonite, in the northwestern Madison Range, southwestern Montana, is defined by several curved lenses of high non-coaxial strain exposed over a 7-km-wide, northeast-trending strip. The country rocks, part of the Archean Wyoming province, are dominantly trondhjemitic to granitic orthogneiss with subordinate amphibolite, quartzite...
Kellogg, Karl S.; Mogk, David W.
Geologic Map of the Santa Barbara Coastal Plain Area, Santa Barbara County, California
This report presents a newly revised and expanded digital geologic map of the Santa Barbara coastal plain area at a compilation scale of 1:24,000 (one inch on the map to 2,000 feet on the ground)1 and with a horizontal positional accuracy of at least 20 m. The map depicts the distribution of bedrock units and surficial deposits and associated...
Minor, Scott A.; Kellogg, Karl S.; Stanley, Richard G.; Gurrola, Larry D.; Keller, Edward A.; Brandt, Theodore R.
Geologic map of the Denver West 30' x 60' quadrangle, north-central Colorado
The Denver West quadrangle extends east-west across the entire axis of the Front Range, one of numerous uplifts in the Rocky Mountain region in which Precambrian rocks are exposed. The history of the basement rocks in the Denver West quadrangle is as old as 1,790 Ma. Along the east side of the range, a sequence of sedimentary rocks as old as...
Kellogg, Karl S.; Shroba, Ralph R.; Bryant, Bruce; Premo, Wayne R. Geologic Map of the Eastern Three-Quarters of the Cuyama 30' x 60' Quadrangle, California
The map area encompasses a large part of the western Transverse Ranges and southern Coast Ranges of southern California. The San Andreas fault (SAF) cuts the northern part of the map. The area south of the SAF, about 80 percent of the map area, encompasses several distinct tectonic blocks bounded by major thrust or reverse faults, including...
Kellogg, Karl S.; Minor, Scott A.; Cossette, Pamela M. New 40Ar/39Ar age determinations and paleomagnetic results bearing on the tectonic and magmatic history of the northern Madison Range and Madison Valley region, southwestern Montana, U.S.A
Detailed 40Ar/39Ar dating and paleomagnetic analysis of dacite porphyry sills and dikes that intrude Cretaceous sedimentary rocks in the northern Madison Range in southwestern Montana show that Laramide shortening was essentially complete by ???69 Ma. A negative paleomagnetic fold test indicates that Laramide folding occurred before cooling of the...
Kellogg, K.S.; Harlan, S.S. Thrust-induced collapse of mountains-an example from the "Big Bend" region of the San Andreas Fault, western transverse ranges, California
Mount Pinos and Frazier Mountain are two prominent mountains just south of the San Andreas fault in the western Transverse Ranges of southern California, a region that has undergone rapid Quaternary contraction and uplift. Both mountains are underlain, at least in part, by thrusts that place granitic and gneissic rocks over sedimentary rocks as...
Kellogg, Karl S. Pliocene transpressional modification of depositional basins by convergent thrusting adjacent to the "Big Bend" of the San Andreas fault: An example from Lockwood Valley, southern California
The "Big Bend" of the San Andreas fault in the western Transverse Ranges of southern California is a left stepping flexure in the dextral fault system and has long been recognized as a zone of relatively high transpression compared to adjacent regions. The Lockwood Valley region, just south of the Big Bend, underwent a profound change in early...
Kellogg, K.S.; Minor, S.A. Taking apart the Big Pine fault: Redefining a major structural feature in southern California
New mapping along the Big Pine fault trend in southern California indicates that this structural alignment is actually three separate faults, which exhibit different geometries, slip histories, and senses of offset since Miocene time. The easternmost fault, along the north side of Lockwood Valley, exhibits left-lateral reverse Quaternary...
Onderdonk, N.W.; Minor, S.A.; Kellogg, K.S. Geologic map of Gunnison Gorge National Conservation Area, Delta and Montrose Counties, Colorado
This publication consists of a geologic map database and printed map sheet. The map sheet has a geologic map as the center piece, and accompanying text describes (1) the various geological units, (2) the uplift history of the region and how it relates to canyon downcutting, (3) the ecology of the gorge, and (4) human history. The map is intended...
Kellogg, Karl S.; Hansen, Wallace R.; Tucker, Karen S.; VanSistine, D. Paco The geologic story of Gunnison Gorge National Conservation Area, Colorado
Kellogg, Karl S. The mesoproterozoic Beaverhead impact structure and its tectonic setting, Montana-Idaho: 40Ar/39 and U-Pb isotopic constraints
New 40Ar/39Ar and uranium-lead (U-Pb) zircon data from the Beaverhead impact structure, first identified by extensive shatter coning of Proterozoic quartzite and gneiss from the Beaverhead Mountains near the Montana-Idaho border, indicate that the structure formed at or after 900 Ma. The 40Ar/39Ar age spectra from fine-grained muscovite and...
Kellogg, K.S.; Snee, L.W.; Unruh, D.M.