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Science 14 January 1994:
Vol. 263. no. 5144, pp. 215 - 218
DOI: 10.1126/science.263.5144.215
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Articles

Modes of Tilting During Extensional Core Complex Development

Drew S. Coleman 1 and J. Douglas Walker 2

1 Massachusetts Institute of Technology, Department of Earth Atmospheric and Planetary Sciences, 54-1126, Cambridge, MA 02139
2 Department of Geology, 120 Lindley Hall, University of Kansas, Lawrence, KS 66044

Crustal extension and formation of the Mineral Mountains core complex, Utah, involved tilting of the Mineral Mountains batholith and associated faults during hanging wall and footwall deformation. The batholith was folded in the hanging wall of the Beaver Valley fault between 11 and 9 million years ago yielding about 45° of tilt. Subsequently, the batholith was unroofed along the Cave Canyon detachment fault, and the batholith and fault were tilted approximately 40° during footwall uplift. Recognition of deformed dikes beneath the detachment fault establishes the importance of footwall tilt during formation of extensional core complexes and demonstrates that footwall rebound can be an important process during extension.

Submitted on July 30, 1993
Accepted on November 24, 1993


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Rock deformation studies in the Mineral Mountains and Sevier Desert of west-central Utah: Implications for upper crustal low-angle normal faulting.
M. H. Anders, N. Christie-Blick, S. Wills, and S. W. Krueger (2001)
Geological Society of America Bulletin 113, 895-907
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