Link to USGS home page
Coastal and Marine Geology Program
Coastal & Marine Geology Program > St. Petersburg Coastal and Marine Science Center > Geologic Framework

Return to: Geologic Framework

Dredge Pit

The dredge pit along the south shore is characterized by bathymetric perspective-block diagram (top) and side-scan sonar imagery (bottom). The pit was dug in the early 1930's for a land-fill project to the Pleistocene surface. Side-scan imagery shows the steep walls of the pit that extend from 7 meters water depth to about 18 meters. A sediment core acquired from the pit provides a unique glimpse at the undisturbed accumulation of material in the lake since the 1930's (see Sediment Characterization).

Dredge pit location Dredge pit 3-D model
Dredge pit sidescan sonar map

Return to: Geologic Framework

Coastal & Marine Geology Program > St. Petersburg Coastal and Marine Science Center > Geologic Framework

FirstGov.gov U. S. Department of the Interior | U.S. Geological Survey
Center for Coastal & Regional Marine Studies

email Feedback | USGS privacy statement | Disclaimer | Accessibility

This page is http://coastal.er.usgs.gov/pontchartrain/figures/framework4.html
Updated December 02, 2016 @ 11:25 AM (THF)