Origin of Unconsolidated Quaternary Deposits at Harriet Point near Redoubt Volcano, Alaska
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Abstract
Unconsolidated boulder-rich diamicton units exposed in sea cliffs at Harriet Point southeast of Redoubt Volcano were evaluated to better understand their provenance relative to the late Quaternary eruptive history of the volcano. A previous study concluded that deposits at Harriet Point were emplaced by a large volcanic landslide originating on the southeast flank of Redoubt Volcano (Begét and Nye, 1994). Field-based analysis of the stratigraphy and sedimentology of the Harriet Point deposits and numerical simulations of the volcanic landslide area of inundation indicate that none of the deposits are volcanogenic. All of the unconsolidated boulder-rich diamicton units at Harriet Point are glacial in origin and can be reconciled using the presently available model for late Quaternary glaciation of Cook Inlet.
Suggested Citation
Waythomas, C.F., 2021, Origin of unconsolidated Quaternary deposits at Harriet Point near Redoubt Volcano, Alaska: U.S. Geological Survey Scientific Investigations Report 2021-5071, 14 p., https://doi.org/10.3133/sir20215071.
ISSN: 2328-0328 (online)
Study Area
Table of Contents
- Abstract
- Introduction
- Deposits at Harriet Point
- Stratigraphy and Interpretation of Deposits at Harriet Point
- Depositional Model for Harriet Point Deposits
- Reevaluation of Harriet Point Debris-Avalanche Deposit
- Summary
- Acknowledgments
- References Cited
Publication type | Report |
---|---|
Publication Subtype | USGS Numbered Series |
Title | Origin of unconsolidated Quaternary deposits at Harriet Point near Redoubt Volcano, Alaska |
Series title | Scientific Investigations Report |
Series number | 2021-5071 |
DOI | 10.3133/sir20215071 |
Year Published | 2021 |
Language | English |
Publisher | U.S. Geological Survey |
Publisher location | Reston, VA |
Contributing office(s) | Alaska Volcano Observatory, Volcano Science Center |
Description | iv, 14 p. |
Country | United States |
State | Alaska |
Other Geospatial | Harriet Point, Redoubt Volcano |
Online Only (Y/N) | Y |
Google Analytic Metrics | Metrics page |