### Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska

By: Frederic H. Wilson**

                            https://doi.org/10.3133/sim3334

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#### Abstract

First posted September 28, 2015

Revised December 19, 2017

**For additional information, contact:**
Alaska Science Center staffU.S. Geological Survey4210 University Dr.Anchorage, AK 99508Alaska Mineral ResourcesAlaska Science Center

This map and accompanying digital files are the result of the interpretation of aerial photographs from the 1950s as well as more modern imagery. The area, long considered a part of Alaska that was largely not glaciated (see Karlstrom, 1964; Coulter and others, 1965; or Péwé, 1975), actually has a long history reflecting local and more distant glaciations. An unpublished photogeologic map of the Taylor Mountains quadrangle from the 1950s by J.N. Platt Jr. was useful in the construction of this map. Limited new field mapping in the area was conducted as part of a mapping project in the Dillingham quadrangle to the south (Wilson and others, 2003); however, extensive aerial photograph interpretation represents the bulk of the mapping effort. The accompanying digital files show the sources for each line and geologic unit shown on the map.

I used the Platt and Muller 1950s-era aerial photographic interpretation map as the starting point for the surficial geology; their unpublished data were produced using a reconnaissance quality topographic base map. In addition to transferring their data to a modern base to use as a guide, all of the photographs were re-examined. As result, in a number of areas, the features have been reinterpreted and the linework revised. A major difference between the maps is the recognition of much more extensive glacially dammed lake deposits and reassignment of some glacial deposits to different glacial events.

#### Suggested Citation

Wilson, F.H., 2017, Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska (ver. 1.2, December 2017): U.S. Geological Survey Scientific Investigations Map 3334, pamphlet 12 p., scale 1:250,000, https://doi.org/10.3133/sim3334.

ISSN: 2329-132X (online)

#### Study Area

#### Table of Contents

- Introduction and Previous Work
- Physiographic and Geologic Framework
- Discussion—Quaternary Geology and Surficial Mapping
- Description of Map Units
- References Cited

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