USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 2001-010-FA

Other ID: IB S-1-01-GM

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): David Twichell

Affiliate Investigator(s): Robert Halley, USGS-St. Pete; Al Hine, USF

Information Specialist(s): David Twichell

Data Type(s): Imagery: Photo, Imagery: Video, Location-Elevation: Navigation, Seismics: Boomer, Sonar: Multibeam, Sonar: Sidescan

Scientific Purpose/Goals: Use sidescan sonar, multibeam bathymetry, and high-resolution seismic data to map the geologic framework and distribution of deep water reefs west of the Florida Keys. An ROV was used to video the deep-water reef to determine extent and composition of benthic biota.


Start Date: 2001-09-05

Start Port/Location: St. Petersburg, FL

End Date: 2001-09-12

End Port/Location: St. Petersburg, FL

Equipment Used: Boomer, Multibeam swath bathymetry, Video camera - deep sea, DGPS, Edgetech DF-1000 sidescan sonar, ISIS, HYPACK, Digital camera, Single channel hydrophone

Information to be Derived:

Summary of Activity and Data Gathered: Cruise ended early due to World Trade Center terrorism and tropical depression forming in the study area.

Staff: Erika Hammar-Klose, Kenneth E. Parolski, Charles Worley

Affiliate Staff:
Bob Halley
USGS-St. Pete - co-chief scientist; Katie Ciembronowicz
USGS-St. Pete - watchstander; Al Hine
Univ. South Florida - co-chief scientist; Stan Locker
Univ. South Florida - seismic data acquisition and processing; David Naar
Univ. South Florida - multibeam data acquisition and processing; Bret Jarrett
Univ. South Florida - watchstander; Glen Taylor
NOAA-NURP - ROV operator

Notes: Original Center People field contained: Chuck Worley - technician to maintain sidescan and navigation gear; Erika Hammar-Klose - processor for sidescan mapping; Ken Parolski - cruise mobilization.
Project = Deep-water reefs, Deep-water reefs


Pulley Ridge, southeastern Gulf of Mexico, Florida, United States, North America, North Atlantic;

North: 25 South: 24.6 West: -83.8 East: -83.6


photo of Suncoaster


Cross, V.A.A., Twichell, David C., Halley, Robert B., Ciembronowicz, Kate T., Jarrett, Bret D., Hammar-Klose, Erika S., Hine, Al C., Locker, Stan D., and Naar, Dave F., 2006, GIS compilation of data collected from the Pulley Ridge deep coral reef region: URL:

Hammar-Klose, E.S., Twichell, D.C., and Worley, C.R., 2003, Archive of sidescan-sonar data and DGPS navigation data collected during USGS Cruise SUNC01010, Pulley Ridge, Gulf of Mexico, 05 September - 12 September, 2001: .


FAN 2001-010-FA has data viewable in the GeoMappApp/Virtual Ocean applications. To view this data in these applications go to and See the instructions for locating USGS data in these applications. You can also view the imagery created from the SEGY data at

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Boomer --- Boomer
Multibeam swath bathymetry --- Multibeam
Bathymetry GIS data ( )
Video camera - deep sea --- Video
DGPS --- Navigation
2001-010-FA-LN-001 ( Processed navigation data)
Edgetech DF-1000 sidescan sonar --- Sidescan
2001-010-FA-SO-001 ( DVD ROM disk of L1-42, PULLEY RIDGE, )
Sidescan mosaic ( )
ISIS --- Sidescan
HYPACK --- Navigation
Digital camera --- Photo
2001-010-FA-PH-001 ( Deck photos of field activity operations)
Single channel hydrophone --- Air Gun / Water Gun
Bubble Gun
Sub Bottom Profiler
2001-010-FA-SE-001 ( Raw SEGY data)
Boomer seismic data ( )