Download e-book for kindle: 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 through the yankee Geophysical Union as a part of the Field journey Guidebooks Series.

smooth depositional environments displayed alongside the northwestern Gulf of Mexico have been the 1st extensively authorised sedimentary facies versions, and effectively guided exploration and construction of quite a few power and nonfuel assets, corresponding to petroleum, lignite, uranium, geothermal power, development mixture, and groundwater. simply because those business actions either required and supplied an immense database, the depositional environments of the Gulf Coast are the most effective identified at any place. This guidebook describes chosen positive aspects of the northwestern Gulf of Mexico coastline, starting from the trendy Mississippi delta and Louisiana coastal simple to the past due Holocene and Pleistocene sediments of Texas. the sphere stops display a spectrum of transgressive and regressive sequences coexisting alongside a microtidal storm-dominated coast present process an important relief in sediment offer (both normal and human-induced) and a mild sea point upward thrust.

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Concerning the ProductPublished by means of the yankee Geophysical Union as a part of the Geophysical Monograph sequence. content material:

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P. The thickness of this transgressive sequence reflects sustained surface aggradation landward of the· then-retreating Teche shoreline under the conditions of relative sea level rise. (Penland et a1. ) Stop 11. Morgan City, Louisiana--Atchafalaya River According to Fisk (1952), the Atchafalaya River was a definite distributary of the Mississippi River by 1542. Although the Atchafalaya River has been diverting water and sediment from the Mississippi for several hundred years, it was not until the early 1950's that sediments (primarily clays) in significant quantities reached the coast.

The goal is to raise elevations, prevent segmentation by tidal processes and storm overwash, and provide a platform for beach T370: 27 nourishment. The Terrebonne Parish project, built in 1985 at a cost of just over $1,000,000, successfully withstood the impact of three hurricanes in 1985, although it required maintenance. Island restoration was scheduled for the entire Isles Dernieres chain in 1988, but the project was put on hold after a $3,000,000 engineering design study. Stop 9. Bayou Terrebonne: Presque Isle, Louisiana-Modern Shelf·Phase Delta The second Lafourche delta to build in the Terrebonne coastal region was the Bayou Terrebonne distributary network, which consists of Bayou Petit Caillou, Bayou Terrebonne, Bayou Saint Jean Charles, Bayou Point au Chiene, and Bayou Black.

87 follows a topographic high that is the narrow crest of an old beach ridge (Figures 23, 48). Marsh vegetation grows on the low, poorly drained, muddy substrates that parallel the beach ridge. Subtle changes in elevation and vegetation on both sides of the road delineate other beach ridges and intervening swales that constitute the chenier plain. The ridges rise 2-3 m above sea level and are composed mainly of sand and shell. They follow arcuate paths converging to the southwest toward a common inflection point that has marked the boundary between accreting shorelines and eroding shorelines over the past few thousand years.

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