Richard F Madole (Former Employee)
Science and Products
Filter Total Items: 27
New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado
New cosmogenic surface-exposure ages of moraine-crest boulders from southwestern Colorado are compared with published surface-exposure ages of boulders from moraine complexes in north-central Colorado and in west-central (Fremont Lake basin) Wyoming. 10Be data sets from the three areas were scaled to a single 10Be production rate of 5.4 at/g/yr at sea level and high latitude (SLHL)...
Authors
L. Benson, R. Madole, G. Landis, J. Gosse
The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines
Eight uncorrected 36Cl ages for Pinedale boulders in north-central Colorado fall in the range 16.5 to 20.9 kyr. 10Be age determinations on four of five boulders are in close agreement (???6% difference) with 36Cl determinations. Hypothetical corrections for snow shielding increased the 36Cl ages of Pinedale boulder surfaces by an average of ???12%. Most ages for pre-Pinedale (Bull Lake)...
Authors
L. Benson, R. Madole, W. Phillips, G. Landis, T. Thomas, P. Kubik
Quaternary stratigraphy, geomorphology, soils, and alpine archaeology in an alpine-to-plains transect, Colorado Front Range Quaternary stratigraphy, geomorphology, soils, and alpine archaeology in an alpine-to-plains transect, Colorado Front Range
No abstract available.
Authors
David P. Dethier, James B. Benedict, Peter W. Birkeland, Nel Caine, P. Thompson Davis, Richard F. Madole, Penny E. Patterson, Alan B. Price, Taylor F. Schildgen, Ralph R. Shroba
Geologic map of the Hygiene quadrangle, Boulder County, Colorado Geologic map of the Hygiene quadrangle, Boulder County, Colorado
No abstract available.
Authors
Richard F. Madole, William A. Braddock, Roger B. Colton
Late Holocene eolian activity in the mineralogically mature Nebraska Sand Hills Late Holocene eolian activity in the mineralogically mature Nebraska Sand Hills
The age of sand dunes in the Nebraska Sand Hills has been controversial, with some investigators suggesting a full-glacial age and others suggesting that they were last active in the late Holocene. New accelerator mass spectrometry radiocarbon ages of unaltered bison bones and organic-rich sediments suggest that eolian sand deposition occurred at least twice in the past 3000 14C yr B.P...
Authors
D.R. Muhs, Thomas W. Stafford, J. B. Swinehart, S.D. Cowherd, S. A. Mahan, C. A. Bush, R.F. Madole, P.B. Maat
Spatial and temporal patterns of late quaternary eolian deposition, Eastern Colorado, U.S.A Spatial and temporal patterns of late quaternary eolian deposition, Eastern Colorado, U.S.A
Eolian sediment covers about 60% of Colorado east of the Rocky Mountains; about 30% of the sediment is sand and 70% is loess. Initially, flood plains were the principal sources of eolian sediment, but during the Holocene, dunes formed from older eolian sand and alluvium on uplands. Since latest Pleistocene time, dominant dune-forming winds have been northwesterly in the northern part of...
Authors
Richard F. Madole
Science and Products
Filter Total Items: 27
New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado
New cosmogenic surface-exposure ages of moraine-crest boulders from southwestern Colorado are compared with published surface-exposure ages of boulders from moraine complexes in north-central Colorado and in west-central (Fremont Lake basin) Wyoming. 10Be data sets from the three areas were scaled to a single 10Be production rate of 5.4 at/g/yr at sea level and high latitude (SLHL)...
Authors
L. Benson, R. Madole, G. Landis, J. Gosse
The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines
Eight uncorrected 36Cl ages for Pinedale boulders in north-central Colorado fall in the range 16.5 to 20.9 kyr. 10Be age determinations on four of five boulders are in close agreement (???6% difference) with 36Cl determinations. Hypothetical corrections for snow shielding increased the 36Cl ages of Pinedale boulder surfaces by an average of ???12%. Most ages for pre-Pinedale (Bull Lake)...
Authors
L. Benson, R. Madole, W. Phillips, G. Landis, T. Thomas, P. Kubik
Quaternary stratigraphy, geomorphology, soils, and alpine archaeology in an alpine-to-plains transect, Colorado Front Range Quaternary stratigraphy, geomorphology, soils, and alpine archaeology in an alpine-to-plains transect, Colorado Front Range
No abstract available.
Authors
David P. Dethier, James B. Benedict, Peter W. Birkeland, Nel Caine, P. Thompson Davis, Richard F. Madole, Penny E. Patterson, Alan B. Price, Taylor F. Schildgen, Ralph R. Shroba
Geologic map of the Hygiene quadrangle, Boulder County, Colorado Geologic map of the Hygiene quadrangle, Boulder County, Colorado
No abstract available.
Authors
Richard F. Madole, William A. Braddock, Roger B. Colton
Late Holocene eolian activity in the mineralogically mature Nebraska Sand Hills Late Holocene eolian activity in the mineralogically mature Nebraska Sand Hills
The age of sand dunes in the Nebraska Sand Hills has been controversial, with some investigators suggesting a full-glacial age and others suggesting that they were last active in the late Holocene. New accelerator mass spectrometry radiocarbon ages of unaltered bison bones and organic-rich sediments suggest that eolian sand deposition occurred at least twice in the past 3000 14C yr B.P...
Authors
D.R. Muhs, Thomas W. Stafford, J. B. Swinehart, S.D. Cowherd, S. A. Mahan, C. A. Bush, R.F. Madole, P.B. Maat
Spatial and temporal patterns of late quaternary eolian deposition, Eastern Colorado, U.S.A Spatial and temporal patterns of late quaternary eolian deposition, Eastern Colorado, U.S.A
Eolian sediment covers about 60% of Colorado east of the Rocky Mountains; about 30% of the sediment is sand and 70% is loess. Initially, flood plains were the principal sources of eolian sediment, but during the Holocene, dunes formed from older eolian sand and alluvium on uplands. Since latest Pleistocene time, dominant dune-forming winds have been northwesterly in the northern part of...
Authors
Richard F. Madole