Skip to main content
U.S. flag

An official website of the United States government

Richard F Madole (Former Employee)

Science and Products

Filter Total Items: 27

Constraints on the age of the Great Sand Dunes, Colorado, from subsurface stratigraphy and OSL dates Constraints on the age of the Great Sand Dunes, Colorado, from subsurface stratigraphy and OSL dates

The age of the Great Sand Dunes has been debated for nearly 150 yr. Seven ages ranging from Miocene to late Holocene have been proposed for them. This paper presents new information—chiefly subsurface stratigraphic data, OSL dates, and geomorphic evidence—that indicates that the Great Sand Dunes began to form in the latter part of the middle Pleistocene. The dunes overlie a thick wedge...
Authors
Richard F. Madole, Shannon Mahan, Joseph H. Romig, Jeremy C. Havens
By
Geosciences and Environmental Change Science Center, Luminescence Dating Laboratory

Holocene alluvial stratigraphy and response to climate change in the Roaring River valley, Front Range, Colorado, USA Holocene alluvial stratigraphy and response to climate change in the Roaring River valley, Front Range, Colorado, USA

Stratigraphic analyses and radiocarbon geochronology of alluvial deposits exposed along the Roaring River, Colorado, lead to three principal conclusions: (1) the opinion that stream channels in the higher parts of the Front Range are relics of the Pleistocene and nonalluvial under the present climate, as argued in a water-rights trial USA v. Colorado, is untenable, (2) beds of clast...
Authors
Richard F. Madole
By
Geology, Minerals, Energy, and Geophysics Science Center, Geosciences and Environmental Change Science Center

On the origin and age of the Great Sand Dunes, Colorado On the origin and age of the Great Sand Dunes, Colorado

Over the past 100??yr, several hypotheses have been proposed for the origin and age of the Great Sand Dunes. These hypotheses differ widely in the descriptions of dune morphometry, the immediate source of eolian sand, and when sand transport occurred. The primary purpose of this paper is to evaluate these hypotheses and, where warranted, to present new ideas about the origin and age of...
Authors
R.F. Madole, J.H. Romig, J. N. Aleinikoff, D.P. VanSistine, E.Y. Yacob

From buttes to bowls: Repeated relief inversion in the landscape of the Colorado Piedmont From buttes to bowls: Repeated relief inversion in the landscape of the Colorado Piedmont

Mesas and buttes of the central Colorado Piedmont are composed of at least two distinct rock types, which differ in their cohesiveness and resistance to erosion. The lower parts of the exposed stratigraphic section are poorly cemented, Upper Cretaceous to Middle Eocene sandstones of the Dawson Formation. The caprocks are composed of one or more resistant formations of Late Eocene age...
Authors
M.L. Morgan, Vincent Matthews, F. Gutierrez, J.P. Thorson, Richard F. Madole, P.R. Hanson
By
Geosciences and Environmental Change Science Center

Surface-exposure ages of Front Range moraines that may have formed during the Younger Dryas, 8.2 cal ka, and Little Ice Age events Surface-exposure ages of Front Range moraines that may have formed during the Younger Dryas, 8.2 cal ka, and Little Ice Age events

Surface-exposure (10Be) ages have been obtained on boulders from three post-Pinedale end-moraine complexes in the Front Range, Colorado. Boulder rounding appears related to the cirque-to-moraine transport distance at each site with subrounded boulders being typical of the 2-km-long Chicago Lakes Glacier, subangular boulders being typical of the 1-km-long Butler Gulch Glacier, and angular...
Authors
Larry Benson, Richard F. Madole, P. Kubik, Richard R. McDonald
By
Water Resources Mission Area, Geosciences and Environmental Change Science Center

Transverse and longitudinal variation in woody riparian vegetation along a montane river Transverse and longitudinal variation in woody riparian vegetation along a montane river

This study explores how the relationship between flow and riparian vegetation varies along a montane river. We mapped occurrence of woody riparian plant communities along 58 km of the San Miguel River in southwestern Colorado. We determined the recurrence interval of inundation for each plant community by combining step-backwater hydraulic modeling at 4 representative reaches with Log...
Authors
Jonathan M. Friedman, G.T. Auble, E.D. Andrews, G. Kittel, R.F. Madole, E.R. Griffin, Tyler M. Allred
By
Ecosystems Mission Area, Fort Collins Science Center

Geologic map of Great Sand Dunes National Park, Colorado Geologic map of Great Sand Dunes National Park, Colorado

Geologic mapping was begun after a range fire swept the area of what is now the Great Sand Dunes National Park in April 2000. The park spans an area of 437 square kilometers (or about 169 square miles), of which 98 percent is blanketed by sediment of Quaternary age, the Holocene and Pleistocene Epochs; hence, this geologic map of the Great Sand Dunes National Park is essentially a...
By
Groundwater and Streamflow Information Program, Geosciences and Environmental Change Science Center

Distribution of Late Quaternary wind-deposited sand in eastern Colorado Distribution of Late Quaternary wind-deposited sand in eastern Colorado

No abstract available.

Pleistocene glaciation in the upper Platte River drainage basin, Colorado Pleistocene glaciation in the upper Platte River drainage basin, Colorado

No abstract available.

Surficial geologic map of the Walden 30' x 60' quadrangle, Jackson, Larimer, and Routt counties, Colorado Surficial geologic map of the Walden 30' x 60' quadrangle, Jackson, Larimer, and Routt counties, Colorado

This map is one of a series of four 30' x 60' surficial geologic maps (1:100,000 scale) intended to provide basic geologic information for planning for energy resource development and growth in northwestern Colorado. An effort is made to characterize all surficial materials, regardless of origin. Hence, residuum is given much more emphasis than is customary, and this results in several...

Surficial geologic map of the Steamboat Springs 30' x 60' quadrangle, Grand, Jackson, and Routt counties, Colorado Surficial geologic map of the Steamboat Springs 30' x 60' quadrangle, Grand, Jackson, and Routt counties, Colorado

This map is one of a series of four 30' x 60' surficial geologic maps (1:100,000 scale) intended to provide basic geologic information for planning for energy resource development and growth in northwestern Colorado. An effort is made to characterize all surficial materials, regardless of origin. Hence, residuum is given much more emphasis than is customary, and this results in several...

Surficial geologic map of the Meeker 30' x 60' quadrangle, Garfield, Moffat, Rio Blanco and Routt Counties, Colorado Surficial geologic map of the Meeker 30' x 60' quadrangle, Garfield, Moffat, Rio Blanco and Routt Counties, Colorado

This map is one of a series of four 30' x 60' surficial geologic maps (1:100,000 scale) intended to provide basic geologic information for planning for energy resource development and growth in northwestern Colorado. An effort is made to characterize all surficial materials, regardless of origin. Hence, residuum is given much more emphasis than is customary, and this results in several...
Image: Io Global Image Mosaic and Geologic Map
Io Global Image Mosaic and Geologic Map
Io Global Image Mosaic and Geologic Map
Image: Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

To present the most information in a single view of Jupiter's moon, Io, a global color mosaic, derived from Galileo color images, was superposed on a higher resolution image mosaic, derived from merging the best resolution images from spacecrafts Galileo and Voyager 1.

By
Astrogeology Science Center, Communications and Publishing
Image: Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

To present the most information in a single view of Jupiter's moon, Io, a global color mosaic, derived from Galileo color images, was superposed on a higher resolution image mosaic, derived from merging the best resolution images from spacecrafts Galileo and Voyager 1.

By
Astrogeology Science Center, Communications and Publishing

Science and Products

Filter Total Items: 27

Constraints on the age of the Great Sand Dunes, Colorado, from subsurface stratigraphy and OSL dates Constraints on the age of the Great Sand Dunes, Colorado, from subsurface stratigraphy and OSL dates

The age of the Great Sand Dunes has been debated for nearly 150 yr. Seven ages ranging from Miocene to late Holocene have been proposed for them. This paper presents new information—chiefly subsurface stratigraphic data, OSL dates, and geomorphic evidence—that indicates that the Great Sand Dunes began to form in the latter part of the middle Pleistocene. The dunes overlie a thick wedge...
Authors
Richard F. Madole, Shannon Mahan, Joseph H. Romig, Jeremy C. Havens
By
Geosciences and Environmental Change Science Center, Luminescence Dating Laboratory

Holocene alluvial stratigraphy and response to climate change in the Roaring River valley, Front Range, Colorado, USA Holocene alluvial stratigraphy and response to climate change in the Roaring River valley, Front Range, Colorado, USA

Stratigraphic analyses and radiocarbon geochronology of alluvial deposits exposed along the Roaring River, Colorado, lead to three principal conclusions: (1) the opinion that stream channels in the higher parts of the Front Range are relics of the Pleistocene and nonalluvial under the present climate, as argued in a water-rights trial USA v. Colorado, is untenable, (2) beds of clast...
Authors
Richard F. Madole
By
Geology, Minerals, Energy, and Geophysics Science Center, Geosciences and Environmental Change Science Center

On the origin and age of the Great Sand Dunes, Colorado On the origin and age of the Great Sand Dunes, Colorado

Over the past 100??yr, several hypotheses have been proposed for the origin and age of the Great Sand Dunes. These hypotheses differ widely in the descriptions of dune morphometry, the immediate source of eolian sand, and when sand transport occurred. The primary purpose of this paper is to evaluate these hypotheses and, where warranted, to present new ideas about the origin and age of...
Authors
R.F. Madole, J.H. Romig, J. N. Aleinikoff, D.P. VanSistine, E.Y. Yacob

From buttes to bowls: Repeated relief inversion in the landscape of the Colorado Piedmont From buttes to bowls: Repeated relief inversion in the landscape of the Colorado Piedmont

Mesas and buttes of the central Colorado Piedmont are composed of at least two distinct rock types, which differ in their cohesiveness and resistance to erosion. The lower parts of the exposed stratigraphic section are poorly cemented, Upper Cretaceous to Middle Eocene sandstones of the Dawson Formation. The caprocks are composed of one or more resistant formations of Late Eocene age...
Authors
M.L. Morgan, Vincent Matthews, F. Gutierrez, J.P. Thorson, Richard F. Madole, P.R. Hanson
By
Geosciences and Environmental Change Science Center

Surface-exposure ages of Front Range moraines that may have formed during the Younger Dryas, 8.2 cal ka, and Little Ice Age events Surface-exposure ages of Front Range moraines that may have formed during the Younger Dryas, 8.2 cal ka, and Little Ice Age events

Surface-exposure (10Be) ages have been obtained on boulders from three post-Pinedale end-moraine complexes in the Front Range, Colorado. Boulder rounding appears related to the cirque-to-moraine transport distance at each site with subrounded boulders being typical of the 2-km-long Chicago Lakes Glacier, subangular boulders being typical of the 1-km-long Butler Gulch Glacier, and angular...
Authors
Larry Benson, Richard F. Madole, P. Kubik, Richard R. McDonald
By
Water Resources Mission Area, Geosciences and Environmental Change Science Center

Transverse and longitudinal variation in woody riparian vegetation along a montane river Transverse and longitudinal variation in woody riparian vegetation along a montane river

This study explores how the relationship between flow and riparian vegetation varies along a montane river. We mapped occurrence of woody riparian plant communities along 58 km of the San Miguel River in southwestern Colorado. We determined the recurrence interval of inundation for each plant community by combining step-backwater hydraulic modeling at 4 representative reaches with Log...
Authors
Jonathan M. Friedman, G.T. Auble, E.D. Andrews, G. Kittel, R.F. Madole, E.R. Griffin, Tyler M. Allred
By
Ecosystems Mission Area, Fort Collins Science Center

Geologic map of Great Sand Dunes National Park, Colorado Geologic map of Great Sand Dunes National Park, Colorado

Geologic mapping was begun after a range fire swept the area of what is now the Great Sand Dunes National Park in April 2000. The park spans an area of 437 square kilometers (or about 169 square miles), of which 98 percent is blanketed by sediment of Quaternary age, the Holocene and Pleistocene Epochs; hence, this geologic map of the Great Sand Dunes National Park is essentially a...
By
Groundwater and Streamflow Information Program, Geosciences and Environmental Change Science Center

Distribution of Late Quaternary wind-deposited sand in eastern Colorado Distribution of Late Quaternary wind-deposited sand in eastern Colorado

No abstract available.

Pleistocene glaciation in the upper Platte River drainage basin, Colorado Pleistocene glaciation in the upper Platte River drainage basin, Colorado

No abstract available.

Surficial geologic map of the Walden 30' x 60' quadrangle, Jackson, Larimer, and Routt counties, Colorado Surficial geologic map of the Walden 30' x 60' quadrangle, Jackson, Larimer, and Routt counties, Colorado

This map is one of a series of four 30' x 60' surficial geologic maps (1:100,000 scale) intended to provide basic geologic information for planning for energy resource development and growth in northwestern Colorado. An effort is made to characterize all surficial materials, regardless of origin. Hence, residuum is given much more emphasis than is customary, and this results in several...

Surficial geologic map of the Steamboat Springs 30' x 60' quadrangle, Grand, Jackson, and Routt counties, Colorado Surficial geologic map of the Steamboat Springs 30' x 60' quadrangle, Grand, Jackson, and Routt counties, Colorado

This map is one of a series of four 30' x 60' surficial geologic maps (1:100,000 scale) intended to provide basic geologic information for planning for energy resource development and growth in northwestern Colorado. An effort is made to characterize all surficial materials, regardless of origin. Hence, residuum is given much more emphasis than is customary, and this results in several...

Surficial geologic map of the Meeker 30' x 60' quadrangle, Garfield, Moffat, Rio Blanco and Routt Counties, Colorado Surficial geologic map of the Meeker 30' x 60' quadrangle, Garfield, Moffat, Rio Blanco and Routt Counties, Colorado

This map is one of a series of four 30' x 60' surficial geologic maps (1:100,000 scale) intended to provide basic geologic information for planning for energy resource development and growth in northwestern Colorado. An effort is made to characterize all surficial materials, regardless of origin. Hence, residuum is given much more emphasis than is customary, and this results in several...
Image: Io Global Image Mosaic and Geologic Map
Io Global Image Mosaic and Geologic Map
Io Global Image Mosaic and Geologic Map
Image: Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

To present the most information in a single view of Jupiter's moon, Io, a global color mosaic, derived from Galileo color images, was superposed on a higher resolution image mosaic, derived from merging the best resolution images from spacecrafts Galileo and Voyager 1.

By
Astrogeology Science Center, Communications and Publishing
Image: Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

Io Global Image Mosaic and Geologic Map

To present the most information in a single view of Jupiter's moon, Io, a global color mosaic, derived from Galileo color images, was superposed on a higher resolution image mosaic, derived from merging the best resolution images from spacecrafts Galileo and Voyager 1.

By
Astrogeology Science Center, Communications and Publishing
Was this page helpful?