Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Universidad Nacional Autónoma de México
2000
|
| Schlagworte: | |
| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=56839402 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Inhaltsangabe:
- Lower Cretaceous rocks of Sierra Los Chinos, east-central Sonora, Mexico Rogelio Monreal José F. Longoria Ciencias de la Tierra Sonora Lower Cretaceous Chihuahua trough Most Lower Cretaceous rocks in Sonora are part of the Bisbee Group of southern Arizona, deposited within a basinconsidered to be an extension of the Gulf of Mexico into Texas, New Mexico, Arizona and Sonora. However, the LowerCretaceous rocks of the Sierra Los Chinos are more closely related to the Lampazos rocks of eastern Sonora, and consequently,to Chihuahua stratigraphy. In the Los Chinos area, the exposed Lower Cretaceous units include the Agua Salada, Lampazos andLos Picachos Formations. The Upper Cretaceous sequence is made up of volcanosedimentary rocks overlain by Tertiary intrusive,volcanic, and sedimentary rocks. Lower Cretaceous rocks of the Sierra Los Chinos area are strongly folded and faulted, withkilometer-scale overturned folds and thrusts. The area was affected by at least two episodes of normal faulting. The Sierra LosChinos sequence is paleogeographically and tectonically related to the Chihuahua tectonic belt and is unrelated to the BisbeeGroup of Sonora. The marine conglomerate at the base of the Los Picachos Formation represents a significant active tectonicepisode at the end of the Albian, possibly related to re-activation of strike-slip faulting due to tectonic transpression. Thecompressional structures in the Los Chinos area are similar to structures of the same age in the states of Chihuahua, Coahuila,and Nuevo León. 2000 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56839402 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.39