Paleomagnetic evidence of Tertiary tectonic rotation in west Texas
Journal Article
·
· Geology; (United States)
- Texas A and M Univ., College Station (United States)
- Univ. Nacional Autonoma, Mexico City (Mexico)
Paleomagnetic samples obtained from Rawls Formation (26.9-28.3 Ma) lava flows of Bofecillos volcano in west Texas give a paleomagnetic pole at lat 76.5[degree]N, long 348.0[degree]E ([alpha][sub 95] = 9.4[degree]; N = 20). This pole is displaced significantly from North American reference poles of similar age, implying a clockwise rotation of 21.3[degree] [plus minus] 8.8[degree]. It is also consistent with other paleomagnetic data from west Texas. The authors argue that the discordance is a result of vertical-axis crustal rotation in west Texas caused by shear deformation that was probably related to Basin and Range tectonics.
- OSTI ID:
- 6991769
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 20:10; ISSN 0091-7613; ISSN GLGYBA
- Country of Publication:
- United States
- Language:
- English
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