| ![](../images/dot_clear.gif) | ![](../images/669corner-ul.gif) | Lake Pontchartrain Atlas: | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | Basin Geology | ![You are at the Basin Geology section of the Environmental Atlas of Lake Pontchartrain](../images/pointer.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | ![](../images/dot_clear.gif) | | ![](../images/669corner-ll.gif) | | ![](../images/dot_clear.gif) | | ![](../images/dot_clear.gif) | ![](../images/dot_clear.gif) | ![](../images/dot_clear.gif) | | | ![](../images/spacer.gif) | Basin Geology - Geomorphology Contributors: Beall, Zganjar, Westphal, Penland ![Map showing location of Pass Manchac.](images/pg58fig1.gif) | Figure 41: Location map for Pass Manchac. | Legend | ![pink bar](images/pinkbar.gif) | Riprap Armor Embankment or revetment along a shoreline reinforced by things thrown together without order in the form of broken concrete, concrete blocks, old pilings, rubble, etc. to resist erosion. | ![red bar](images/redbar.gif) | Bulkhead A wood, steel, or concrete wall along a waterfront. Can be adjacent to the land as a retaining wall or separate from it as a seawall to provide wave protection and resist erosion. | ![blue bar](images/bluebar.gif) | Swamp Any forested area normally subject to inundation through part of the growing season or with permanent or near-permanent standing water. | ![green bar](images/greenbar.gif) | Fresh Marsh Any unforested, vegetated area normally subject to inundation or tidal action at any time sufficient to support wetland-dependent, emergent vegetation with salinity less than 0.5 ppt. | ![purple bar](images/purplebar.gif) | Swamp with Fresh Marsh An area of swamp at the shoreline that contains a fresh marsh (salinity less than 0.5 ppt) behind the shoreline. | ![gray bar](images/graybar.gif) | Bank Natural riverine or lacustrine bank with grass and trees. | | | Figure 42: Shoreline types of pass Manchac. Based on Summer 1996 aerial video survey. (Click on a letter to see a photograph of the shoreline.) | « Previous | Next » |