PALEOMAGNETIC EVIDENCE OF TERTIARY TECTONIC ROTATION IN WEST TEXAS

被引：0
作者：
SAGER, WW
MORTERAGUTIERREZ, CA
URRUTIAFUCUGAUCHI, J
机构：
[1] TEXAS A&M UNIV SYST,DEPT GEOPHYS,COLL STN,TX 77843
[2] UNIV NACL AUTONOMA MEXICO,INST GEOFIS,DELEGACION COYOACAN 04510,DF,MEXICO
来源：
GEOLOGY | 1992年 / 20卷 / 10期
关键词：
D O I：
10.1130/0091-7613(1992)020<0935:PEOTTR>2.3.CO;2
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
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-degrees-N, long 348.0-degrees-E (alpha95 = 9.4-degrees; N = 20). This pole is displaced significantly from North American reference poles of similar age, implying a clockwise rotation of 21.3-degrees +/- 8.8-degrees. It is also consistent with other paleomagnetic data from west Texas. We 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.
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页码：935 / 938
页数：4
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