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Maps showing aeromagnetic data and interpretation for the Kalmiopsis Wilderness, southwestern Oregon

Miscellaneous Field Studies Map 1240-D

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Abstract

The distinctive magnetic properties of the major rock types in the Kalmiopsis Wilderness of southwestern Oregon facilitate interpretation of aeromagenetic data. The region is composed of tectonic slices of magnetic ultramafic, gabboric, and other ophiolitic rocks faulted against  the realitively nonmagnetic Dothan Formation, the equivalent of the Franciscan Complex of Western California. The sharp contacts between these rocks are manifested in the data by abrupt contrases in the nature of the magnetic anomalies which provide insights into the structural relations of major geologic elements. 

Most individual anomalies in this area are caused by known geologic boundaries or topographic features; those that are not are of particular interest because they may reflect areas of increased or decreased magnetization associated with zones of minerlization. 

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Maps showing aeromagnetic data and interpretation for the Kalmiopsis Wilderness, southwestern Oregon
Series title:
Miscellaneous Field Studies Map
Series number:
1240
Chapter:
D
Year Published:
1983
Language:
English
Publisher:
U. S. Geological Survey
Publisher location:
Reson, VA
Description:
2 plates: 29.41 x 49.89 inches and 41.19 x 40.73 inches
Country:
United States
State:
Oregon
Other Geospatial:
Kalmiopsis Wilderness
Scale:
62500
Online Only (Y/N):
N
Additional Online Files (Y/N):
N