Survey Overview

All geophysical data described in this report were acquired from R/V Erda (fig. 1). The Erda 90-1 geophysical cruise was conducted in two legs. The first leg included seismic data collected from the Hancock County region of the Mississippi Sound (Erda 90-1_HC) from June 4 to June 6, 1990 (fig. 2). The second leg included seismic data collected from the Petit Bois Pass area of Mississippi Sound (Erda 90-1_PBP) from June 8 to June 9, 1990 (fig. 3). The Erda 91-3 cruise occurred between September 12 and September 23, 1991, and surveyed the Mississippi Sound region just west of Horn Island, Mississippi (fig. 4).

Figure 1.  The R/V Erda (operated by Argonne National Labs) at Lake Pontchartrain Marina. Photograph from Sanford and others (2008). [Click figure to enlarge]

Figure 2.   Trackline map for the R/V Erda Hancock County cruise (Erda 90-1_HC) in June of 1990. [Click figure to enlarge]

Figure 3.   Trackline map for the R/V Erda Petit Bois Pass cruise (Erda 90-1_PBP) in June of 1990. [Click figure to enlarge]

Figure 4.  Trackline map for the R/V Erda cruise (Erda 91-3) in September of 1991. [Click figure to enlarge]