Possible active fault traces on or near the Castle Mountain fault between Houston and the Hatcher Pass Road: A section in RGeologic studies in Alaska by the U.S. Geological Survey, 1993

Bulletin
By:

Links

Abstract

The Castle Mountain fault is one of several major east-northeast-striking faults in southern Alaska, and it has had historical seismicity and Holocene surface faulting. The Castle Mountain fault was delineated on a regional scale by Detterman and others (1974, 1976), who divided it into two physiographic segments. Mapping in a 30-km-long region between the two segments (from Houston to the Hatcher Pass Road) is the subject of this study. I found two faults in the central part of the study area, north of the inferred trace of the Castle Mountain fault, which have experienced late Quaternary surface-faulting. I also traced the Castle Mountain fault in the Houston area about 3 km farther east than previously recognized. The age of faulting in the study area is constrained by the glacial history to be younger than approximately 10,000 yr B.P. on several faults and younger than approximately 40,000 yr B.P. on another fault. However, because prior work on the Castle Mountain fault west of the study area has recognized surface faulting younger than 1,860 yr B.P., it is likely that the age of faulting within the study area is substantially younger than 10,000 or 40,000 yr B.P.

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Possible active fault traces on or near the Castle Mountain fault between Houston and the Hatcher Pass Road: A section in RGeologic studies in Alaska by the U.S. Geological Survey, 1993
Series title Bulletin
Subseries 2107
DOI 10.3133/70180221
Year Published 1994
Language English
Publisher U.S. Government Printing Office
Publisher location Washington, D.C.
Contributing office(s) Alaska Science Center, Alaska Science Center Geology Minerals
Description 10 p.
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Geologic studies in Alaska by the U.S. Geological Survey, 1993 (Bulletin 2107)
First page 49
Last page 58
Country United States
State Alaska
Other Geospatial Castle Mountain fault