Quaternary geology, Cold Bay and False Pass quadrangles, Alaska Peninsula
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- Document: Start page in larger work
- Larger Work: Geologic studies in Alaska by the U.S. Geological Survey, 1999
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Abstract
Recent mapping and interpretation of Quaternary geologic features has improved our understanding of the interaction between volcanic, glacial, and tectonic activity in the Cold Bay and False Pass 1:250,000-scale quadrangles on the Alaska Peninsula. The glacial and volcanic record of the map area strongly suggests that continental-shelf glaciations and two massive volcanic centers were the dominant controls over landscape development during Pleistocene time. Ancestral Morzhovoi and Emmons Volcanoes were major impediments to flow of shelf glaciers during much of the Pleistocene. Our mapping suggests that the area around Emmons Volcano may have also been an important source area for glaciers during this period. Our data further indicate that Frosty Volcano developed late in the Pleistocene, having had no apparent impact on early Brooks Lake glacial advances but serving as a source area for later glacial advances during late Brooks Lake time. We also believe that major Holocene eruptions of Frosty Volcano have yielded multiple debris and ash flows resulting in the construction of a new south summit cone that filled an earlier crater. Frosty Volcano was the source area for multiple Holocene glacial advances, and its flanks preserve the best record of Neoglacial activity in the map area.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Quaternary geology, Cold Bay and False Pass quadrangles, Alaska Peninsula |
| Series title | Professional Paper |
| Subseries | 1633 |
| DOI | 10.3133/70180468 |
| Year Published | 2001 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Denver, CO |
| Contributing office(s) | Alaska Science Center |
| Description | 21 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Geologic studies in Alaska by the U.S. Geological Survey, 1999 |
| First page | 51 |
| Last page | 71 |
| Country | United States |
| State | Alaska |
| Other Geospatial | Alaska Peninsula, Cold Bay quadrangle, False Pass quadrangle |
| Google Analytic Metrics | Metrics page |