Near-shore core dataset

Highstand strata of the central Texas shelf are dominated by prograding clastic shoreline deposits - see Rodriguez et al. (2001) for further details. In order to gain a better understanding of these deposits we undertook an investigation of the coastal deposits associated with the modern highstand.

The near-shore core dataset consists of 15 profiles, 7 cores per profile. Each core is up to 5 m long and samples upper shoreface, proximal lower shoreface, distal lower shoreface, marine, and Pleistocene sediments. The bounding surfaces are from top to bottom, the downlap surface, ravinement surface 2, and the basal Stage 2 sequence boundary.

Profile numbers 1-15 are clickable to detailed individual profiles.
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This is a fence diagram showing the trends of shoreface profiles 1-15. The Stage 2 sequence boundary is deepest in profiles 1-4, 12. The sequence boundary depth is related to the presence or absence of fluvial incision. The Lavaca and Nueces rivers (profiles 1-4, 12, respectively) incised up to -36 meters within the bays during the Stage 2 lowstand. High accommodation space combined with high sediment supply has resulted in thick successions of shoreface 1 sediments preserved within these valleys below ravinement surface 2. Subsequent progradation related to the modern shoreface 2 has prograded and downlapped onto marine and distal lower shoreface sediments. Shoreface 1 is contained within the transgressive systems tract and shoreface 2 is currently prograding within the highstand systems tract.

Near-shore core dataset

Evolution of the Central Texas shoreface
Central Texas versus East Texas shoreface preservation potential

Offshore dataset

Highstand systems tract

Lowstand systems tract

Transgressive systems tract

Controlling factors on shoreline configuration

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