Coastal Depositional Systems, Northwest Gulf of Mexico: New by John R. Suter, Robert A. Morton, Shea Penland

By John R. Suter, Robert A. Morton, Shea Penland

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Published by means of the yank Geophysical Union as a part of the Field journey Guidebooks Series.

sleek depositional environments displayed alongside the northwestern Gulf of Mexico have been the 1st greatly approved sedimentary facies versions, and effectively guided exploration and construction of quite a few strength and nonfuel assets, akin to petroleum, lignite, uranium, geothermal power, development combination, and groundwater. simply because those commercial actions either required and supplied a major database, the depositional environments of the Gulf Coast are probably the greatest recognized anyplace. This guidebook describes chosen positive factors of the northwestern Gulf of Mexico coastline, starting from the trendy Mississippi delta and Louisiana coastal undeniable to the past due Holocene and Pleistocene sediments of Texas. the sphere stops exhibit a spectrum of transgressive and regressive sequences coexisting alongside a microtidal storm-dominated coast present process an important aid in sediment provide (both common and human-induced) and a moderate sea point upward push.

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Additional resources for Coastal Depositional Systems, Northwest Gulf of Mexico: New Orleans, Louisiana to Houston, Texas, July 21-25, 1989

Sample text

As a result, strong currents flow seaward from the seawall toe, and the beach sand is lost to the longshore currents or deposited on the lower shoreface below normal wave base. The long-term effect of FIGURE 52 Changes in beach profiles on Galveston Island between 1946 and 1980 (A) near the western end of the seawall and (B) on West Beach just west of the seawall. S. Army Corps of Engineers (1980 and unpublished drawings). these processes has been accelerated beach erosion (Morton, 1988). on West Beach (Figure 52) as well as changes .

The abandoned fans are locally subsiding and eroding because sediment is no longer being deposited on the fan surface. 2 kIn) sandy lithosome bracketed between muddy marine sediments of the inner continental shelf and bay. The adjoining bay was partially restricted to tidal exchange before Rollover Pass was artificially opened in 1955. Before then, Bolivar Peninsula was attached to the mainland and grew seaward and to the southwest in the direction of net littoral drift. Consequently, the barrier is wider and thicker toward the natural tidal inlet ,at Bolivar Roads.

It is also the only mine taken over by the Strategic Petroleum Reserve (SPR) to store oil in preparation for an oil embargo (the other reserves are in solution-mined cavities). Salt mining continues to the north and west of the SPR cavity and may eventually continue below it. The main oil production is from the north flank, which is also the "overhang" flank (youngest spine). 5 m at Pecan Island. The Holocene sediments rest unconformably on a weathered and eroded surface of the Prairie Formation (Figure 44).

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