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Reinterpretation of the stratigraphy and structure of the Rancho Las Norias area, central Sonora, Mexico

Journal of South American Earth Sciences

By:
, , , and
DOI: 10.1016/j.jsames.2003.07.002

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Abstract

New geologic mapping and fossil data in the vicinity of Rancho Las Norias, 30 km east of Hermosillo, Sonora, Mexico, show that rocks previously mapped as Precambrian instead are Paleozoic. Previous geologic maps of the Rancho Las Norias area show northeast-directed, southwest-dipping reverse or thrust faults deforming both Precambrian and Paleozoic rocks. The revised stratigraphy requires reinterpretation of some of these faults as high-angle normal or oblique-slip faults and the elimination of other faults. We agree with earlier geologic map interpretations that compressional structures have affected the Paleozoic rocks in the area, but our mapping suggests that the direction of compression is from southeast to northwest. Published by Elsevier Ltd.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Reinterpretation of the stratigraphy and structure of the Rancho Las Norias area, central Sonora, Mexico
Series title:
Journal of South American Earth Sciences
DOI:
10.1016/j.jsames.2003.07.002
Volume
16
Issue:
6
Year Published:
2003
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of South American Earth Sciences
First page:
523
Last page:
540
Number of Pages:
18