--> ABSTRACT: High-Resolution Sequence Stratigraphy of Lower-Middle Guadalupian Outcrops, Western Guadalupe Mountains, Texas and New Mexico, by W. M. Fitchen, M. E. New; #91003 (1990).
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ABSTRACT: High-Resolution Sequence Stratigraphy of Lower-Middle Guadalupian Outcrops, Western Guadalupe Mountains, Texas and New Mexico

W. M. Fitchen, M. E. New

We describe parts of three third-order depositional sequences and their associated system Previous HittractsNext Hit within seismic-scale outcrops of the Lower-Middle Guadalupian Northwestern shelf-to-Delaware basin transition. These sequences are well exposed along a 20-km dip-oriented transect in the western Guadalupe Mountains, Texas and New Mexico. Previous HitSystemsNext Hit Previous HittractsNext Hit are defined on the basis of lithofacies distribution, stratal geometry, and bounding (stratal termination) surfaces. These Lower-Middle Guadalupian sequences record (1) carbonate platform retrogradation, basin margin erosion, and sediment starvation followed by platform aggradation and progradation (lower San Andres Formation-Cutoff Formation; transgressive and highstand Previous HitsystemsNext Hit Previous HittractsNext Hit), (2) major basin infill by terrigenous cla tics bypassed over the underlying lower San Andres highstand carbonate bank and development of a shelf-margin-restricted carbonate bank and coeval base-of-slope apron (Brushy Canyon Formation, Cherry Canyon Tongue, and basal upper San Andres Formation; lowstand and transgressive Previous HitsystemsNext Hit Previous HittractsNext Hit), (3) progradation of a mixed carbonate-terrigenous clastic bank (upper San Andres Formation; highstand Previous HitsystemsNext Hit tract), followed by subaerial exposure of the highstand bank top, and (4) deposition of interbedded terrigenous clastics and carbonates in a shorezone that onlaps the subaerial exposure surface at the top of the upper San Andres Formation highstand bank (lower Grayburg Formation; lowstand and transgressive Previous HitsystemsNext Hit Previous HittractsNext Hit). Previous HitSystemsNext Hit Previous HittractsNext Hit developed in response to the interaction of rate an direction of change of relative Previous HitseaNext Hit Previous HitlevelTop; timing, rate and location of terrigenous clastic supply; and depositional topography.

AAPG Search and Discovery Article #91003©1990 AAPG Annual Convention, San Francisco, California, June 3-6, 1990