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GEOREF RECORD

Synopsis of the stratigraphy and paleontology of the uppermost Cretaceous and lower Tertiary strata in the Denver Basin, Colorado

Robert G. Raynolds and Kirk R. Johnson
Synopsis of the stratigraphy and paleontology of the uppermost Cretaceous and lower Tertiary strata in the Denver Basin, Colorado (in Paleontology and stratigraphy of Laramide strata in the Denver Basin; Part II, Kirk R. Johnson (editor), Robert G. Raynolds (editor) and Michele L. Reynolds (editor))
Rocky Mountain Geology (2003) 38 (1): 171-181

Abstract

In a multidisciplinary effort, uppermost Cretaceous and lower Tertiary Laramide synorogenic strata in the Denver Basin have been dated using biostratigraphy, magnetostratigraphy, and radioactive isotopes. The resulting calibrated framework permits biotic and stratigraphic events to be examined in a spatial and temporal context. Synorogenic sediments accumulated in two distinct pulses separated by about eight million years. Faunal changes are evident across time and, to a lesser extent, space. In addition to evolutionary changes through time, floras show distinctive distributional patterns that reflect the ancient landscape and indicate the presence of Paleocene monsoons on eastern flanks of the Rocky Mountains. Observations by the Denver Basin Project team have been used to create a series of rigorously documented paintings reconstructing ancient Denver Basin landscapes. As a result of our stratigraphic work, bedrock aquifer patterns in the Denver Basin are better quantified. The Arapahoe aquifer is comprised of a series of buried alluvial fans and does not form a uniform layer across the Denver Basin.


ISSN: 1555-7332
EISSN: 1555-7340
Coden: WUGGAO
Serial Title: Rocky Mountain Geology
Serial Volume: 38
Serial Issue: 1
Title: Synopsis of the stratigraphy and paleontology of the uppermost Cretaceous and lower Tertiary strata in the Denver Basin, Colorado
Title: Paleontology and stratigraphy of Laramide strata in the Denver Basin; Part II
Author(s): Raynolds, Robert G.Johnson, Kirk R.
Author(s): Johnson, Kirk R.editor
Author(s): Raynolds, Robert G.editor
Author(s): Reynolds, Michele L.editor
Affiliation: Denver Museum of Nature & Science, Department of Earth Sciences, Denver, CO, United States
Affiliation: Denver Museum of Nature & Science, Department of Earth Sciences, Denver, CO, United States
Pages: 171-181
Published: 2003
Text Language: English
Publisher: University of Wyoming, Dept. of Geology and Geophysics, Laramie, WY, United States
References: 39
Accession Number: 2004-024715
Categories: StratigraphyHydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 1 plate, geol. sketch map
N39°00'00" - N39°45'00", W105°00'00" - W104°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200408
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