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Date Permissions Signed


Date of Award

Spring 1995

Document Type

Masters Thesis

Degree Name

Master of Science (MS)



First Advisor

Beck, Myrl E.

Second Advisor

Babcock, R. Scott (Randall Scott)

Third Advisor

Burmester, Russell F.


Paleomagnetic techniques were used to determine crustal rotations at two locations along the Liquine Ofqui fault zone (LOFZ) in southern Chile, South America. East of the fault zone, near the town of Lago Verde, twelve sites drilled in intermediate volcanic rocks and diorite yielded a paleomagnetic pole at 82°S, 210.8°E (A95=8.3°), which, when compared to a Late Cretaceous reference pole (the mean of Butler et al. (1991) and Somoza (1994) poles) implies 17.7° ± 11.1° of in situ, clockwise rotation. At Cocotue Beach, west of the fault zone on Isla Chiloe, seven sites drilled in middle Tertiary basalts yielded a paleomagnetic pole at 54.9°S, 349°E (A95=15.4°) that implies 45° ± 18.7° of in situ, counterclockwise rotation when compared to a middle Tertiary reference pole (Diehl et al., 1988) rotated into the South American reference frame. There is reason to have some reservations about data from both localities, but the results, nevertheless, are consistent with other kinematic studies along the LOFZ. The geology of the Lago Verde field area is described in aid of the paleomagnetic work.




Paleomagnetic techniques, Crustal rotations, Lago Verde, Kinematic studies


Western Washington University

OCLC Number


Subject – LCSH

Faults (Geology)--Chile; Plate tectonics--Chile; Paelomagnetism--Chile; Kinematics

Geographic Coverage





masters theses




Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.

Map of Lago Verde Field Area reduced 7272144.pdf (147 kB)
Map of Lago Verde Field Area

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