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

Quaternary Research

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DOI: 10.1016/j.yqres.2012.05.005

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Abstract

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-supported gravel alternate in vertical succession with beds of fine-grained sediment (sand, mud, and peat) in response to centennial-scale changes in snowmelt-driven peak discharges, and (3) alluvial strata provide information about Holocene climate history that complements the history provided by cirque moraines, periglacial deposits, and paleontological data. Most alluvial strata are of late Holocene age and record, among other things, that: (1) the largest peak flows since the end of the Pleistocene occurred during the late Holocene; (2) the occurrence of a mid- to late Holocene interval (~2450–1630(?) cal yr BP) of warmer climate, which is not clearly identified in palynological records; and (3) the Little Ice Age climate seems to have had little impact on stream channels, except perhaps for minor (~1 m) incision. Published

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Holocene alluvial stratigraphy and response to climate change in the Roaring River valley, Front Range, Colorado, USA
Series title:
Quaternary Research
DOI:
10.1016/j.yqres.2012.05.005
Volume
78
Issue:
2
Year Published:
2012
Language:
English
Publisher:
Elsevier
Publisher location:
Amsterdam, Netherlands
Contributing office(s):
Geology and Environmental Change Science Center
Description:
12 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
197
Last page:
208
Number of Pages:
11
Country:
United States
State:
Colorado
Other Geospatial:
Front Range;Roaring River Valley