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| Schematic cross section showing shoal formation, developed using seismic and core data collected from a submerged portion of the St. Bernard Delta (a lobe of the Mississippi River Delta). As sea level (SL 1 and 2) rose during the transgression, a barrier island arc was formed. In response to rising sea level, the barrier island migrated shoreward over lagoonal muds. Rising sea level (SL 3) drowned the barrier island and continuing sea level rise (SL 4) reworked the drowned barrier to form the St. Bernard Shoals. |
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