Basins of the Rio Grande Rift: Structure, Stratigraphy, and Tectonic Setting

Tertiary stratigraphy and tectonic development of the Alamosa basin (northern San Luis Basin), Rio Grande rift, south-central Colorado
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Published:January 01, 1994
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CiteCitation
Brian S. Brister, Robbie R. Gries, 1994. "Tertiary stratigraphy and tectonic development of the Alamosa basin (northern San Luis Basin), Rio Grande rift, south-central Colorado", Basins of the Rio Grande Rift: Structure, Stratigraphy, and Tectonic Setting, G. Randy Keller, Steven M. Cather
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Analysis of borehole and reflection seismic data from the Alamosa basin (northern San Luis Basin, Rio Grande rift) reveals tectonic development in response to three Tertiary events, each with an associated package of rocks distinguished by mineralogy and petrology. Eocene redbeds of the Blanco Basin Formation (0 to 696 m thick) are micaceous, sandy mudstone and coarse arkosic sandstone units containing lithic pebbles derived from granitic basement rock. They were deposited in a late Laramide basin formed during wrench-fault-related segmentation of the early Laramide San Luis-Brazos uplift. The western half of the younger, rift-related Alamosa basin is superposed over this...
- ash-flow tuff
- basement
- basins
- boreholes
- Cenozoic
- clastic rocks
- Colorado
- conglomerate
- elastic waves
- evolution
- extension tectonics
- faults
- geometry
- geophysical methods
- geophysical profiles
- geophysical surveys
- half grabens
- igneous rocks
- isochrons
- Laramide Orogeny
- lava flows
- mudstone
- North America
- pyroclastics
- reflection
- Rio Grande Rift
- Rocky Mountains
- San Juan volcanic field
- sandstone
- Sangre de Cristo Mountains
- Santa Fe Group
- sedimentary rocks
- seismic methods
- seismic profiles
- seismic waves
- stratigraphy
- surveys
- tectonics
- Tertiary
- traveltime
- U. S. Rocky Mountains
- United States
- volcanic rocks
- volcaniclastics
- volcanism
- well logs
- wrench faults
- south-central Colorado
- Conejos Formation
- San Luis Basin
- Blanco Basin Formation
- Brazos Uplift
- Sangre de Cristo fault zone
- Alamosa Basin