Use of packrat middens to determine rates of cliff retreat in the eastern Grand Canyon, Arizona
Geology
By: Kenneth L. Cole and Larry Mayer
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Abstract
Packrat midden data can be used to calculate rates of cliff retreat by relating midden age to the distance between cliff face and midden. Regression analysis using 14 radiocarbon-dated packrat deposits from the Mississippian Redwall Limestone in the eastern Grand Canyon suggests that the Redwall has been retreating at an average rate of 0.45 m/103 14C yr. This rate of cliff retreat, which is comparable to other cliff-retreat rates reported from arid environments, implies that the Colorado River cut through the Redwall Limestone in the vicinity of Horseshoe Mesa about 3.7 m.y. B.P.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Use of packrat middens to determine rates of cliff retreat in the eastern Grand Canyon, Arizona |
| Series title | Geology |
| DOI | 10.1130/0091-7613(1982)10<597:UOPMTD>2.0.CO;2 |
| Volume | 10 |
| Issue | 11 |
| Year Published | 1982 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 3 p. |
| First page | 597 |
| Last page | 599 |
| Country | United States |
| State | Arizona |
| Other Geospatial | Grand Canyon |
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