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Summary for Field Activity Number 1985-027-FA

Alternate Leg ID: 85 Leg 1

Area of Operations: western Gulf of Mexico, Texas, Louisiana, United States, North America, North Atlantic

Dates: August 07, 1985 to September 03, 1985

Objectives: The purpose of this cruise was to map the sea floor between approximately the shelf edge and the seaward limit of the EEZ using the GLORIA system owned and operated by IOS. Leg 1 focused on the western half of the Gulf of Mexico seaward of Texas and Louisiana abutting GLORIA coverage from a 1982 survey. This portion of the Gulf is dominated by salt tectonics. The area mapped with GLORIA during this leg was 45,000 sq nautical miles.

Type of Activity:

Information to be derived:

Summary: Hurricane Denny resulted in a loss of 13 hours of operation on August 14, 1985, and Hurricane Elena delayed arrival in New Orleans one day, from September 2 to September 3, 1985. The impact that the warm surface water and strong thermocline present in the Gulf of Mexico in the summer would have on the range of the GLORIA system was not realized. Although GLORIA was run at a 30 sec. repetition rate, 45 km swath width, the maximum swath width actually obtained was 8 km in approximately 1000 m of water. This required reducing the trackline spacing and adding additional tracklines and limited the effort in water depths shallower than 1000 m. Initially much time was spent getting all equipment operational. The GLORIA system suffered from logging problems resulting in a loss of approximately 24 hours of data during the cruise. The longest continuous down time period was 12 hours. Dirt particles in the air being pulled across the recording heads by the air conditioning system appears to have been the major problem. The air gun system was down a total of approximately 24 hours due to compressor, streamer and gun problems. The longest continuous period of down time was 7 hours. The magnetometer required 3 days to get operational initially but this was partly a result of its lower priority. A new computer system was installed for this cruise. Most of the leg was required to get the system operating properly. Navigation has to be plotted by hand for the duration of the cruise. Summary data plots for the cruise, however, were completed with the computer system at the end of the cruise. The data in the western Gulf are very interesting geologically. The Sigsbee Escarpment can be identified on the sonographs with piles of debris in places at its base. A continuous channel can be traced from the shelf edge through the diapir province of the slope, forming a reentrant in the Sigsbee Escarpment, and then meandering seaward across the rise into the deep water of the Gulf. The fan of the Rio Grande has a braided channel system and features which are interpreted to be bedforms on it. Similar bedforms are present seaward of the Sigsbee Escarpment suggesting that strong bottom currents are present in the region.

USGS Project Number: EEZ

Contact: Bonnie McGregor ()

InfoBank: uses the identifier F-1-85-GM. Visit this site for more information.

Map for Area of Operations :

Map of field activity boundary.

Platform Info:
photo of FARNELLA
FARNELLA

The following materials for this field activity are available in the Information Archives:

Paper seismic/sidescan bottom profiles:

Inventory #LinesFolderStart TimeEnd TimeProfile TypeRemarks
019351A-1F 00123:06 08/07/198522:42 08/10/1985 3.5K-
019361F-2 00222:48 08/10/198500:00 08/14/1985 3.5K-
019372-4 00300:00 08/14/198512:30 08/16/1985 3.5K-
019384 00412:37 08/16/198500:00 08/18/1985 3.5K-
019395 00500:05 08/18/198500:00 08/19/1985 3.5K-
019405,6 00600:00 08/19/198523:57 08/19/1985 3.5K-
019416,7 00700:00 08/20/198523:58 08/20/1985 3.5K-
019427 00800:00 08/21/198516:30 08/21/1985 3.5K-
019437-9 00916:36 08/21/198523:52 08/23/1985 3.5K-
019449 01023:54 08/23/198523:56 08/24/1985 3.5K-
0194510,11 01100:00 08/25/198523:56 08/25/1985 3.5K-
0194611-14 01200:00 08/26/198523:10 08/26/1985 3.5K-
0194714-17 01323:24 08/26/198524:00 08/27/1985 3.5K-
0194817-20 01400:01 08/28/198523:57 08/28/1985 3.5K-
0194920-14B 01500:00 08/29/198523:58 08/29/1985 3.5K-
0195014B-24F 01623:59 08/29/198523:55 08/30/1985 3.5K-
0195124F 01700:00 08/31/198507:41 08/31/1985 3.5K-
01952A25-27 01807:47 08/31/198501:39 09/01/1985 3.5K-
01952B27,28 01901:53 09/01/198515:43 09/01/1985 3.5K-
019531A-1E 00123:12 08/07/198511:45 08/10/1985 10K-
019541E-2 00211:46 08/10/198502:45 08/13/1985 10K-
019552,3 00302:48 08/13/198516:10 08/15/1985 10K-
019563-5 00416:10 08/15/198501:11 08/18/1985 10K-
019575,6 00501:17 08/18/198512:36 08/20/1985 10K-
019586-8 00612:42 08/20/198501:46 08/23/1985 10K-
019598-10 00701:49 08/23/198516:00 08/25/1985 10K-
0196011-17 00816:02 08/26/198505:09 08/28/1985 10K-
0196117-24D 00905:12 08/28/198517:55 08/30/1985 10K-
0196224D-24F 01017:58 08/30/198507:35 08/31/1985 10K-
019631A-1G 00113:30 08/08/198509:10 08/11/1985 AIR- 8 SEC SWP
019641G 00209:20 08/11/198506:19 08/12/1985 AIR- 8 SEC SWP
019651G-2 00306:30 08/12/198514:00 08/12/1985 AIR- 8 SEC SWP
019662-7 00420:00 08/12/198519:55 08/21/1985 AIR- 8 SEC SWP
019677-8 00520:00 08/21/198516:15 08/22/1985 AIR- 8 SEC SWP
019688-24F 00616:28 08/22/198507:35 08/31/1985 AIR- 8 SEC SWP
0196918,PART LINE 2 00114:30 08/08/198500:00 08/14/1985 AIR- 5 SEC SWP
019702-4 00200:05 08/14/198500:00 08/17/1985 AIR- 5 SEC SWP
019714 00300:00 08/17/198500:00 08/18/1985 AIR- 5 SEC SWP
019725 00400:00 08/18/198500:00 08/19/1985 AIR- 5 SEC SWP
019735,6 00500:00 08/19/198500:00 08/20/1985 AIR- 5 SEC SWP
019746,7 00600:00 08/20/198523:58 08/20/1985 AIR- 5 SEC SWP
019757 00700:00 08/21/198500:00 08/22/1985 AIR- 5 SEC SWP
019767-9 00800:00 08/22/198523:53 08/23/1985 AIR- 5 SEC SWP
019779 00923:54 08/23/198523:57 08/24/1985 AIR- 5 SEC SWP
0197810,11 01023:57 08/24/198523:57 08/25/1985 AIR- 5 SEC SWP
0197911-24F 01123:58 08/25/198507:35 08/31/1985 AIR- 5 SEC SWP
019801G-24F 00119:30 08/11/198507:35 08/31/1985 AIR- 2 SEC SWP
019811,2 00116:36 09/06/198500:00 09/08/1985 3.5K-
019822,3 00200:06 09/08/198500:00 09/09/1985 3.5K-
019834,5 00300:06 09/09/198500:00 09/10/1985 3.5K-
019845,6 00400:06 09/10/198500:00 09/11/1985 3.5K-
019856,7 00500:06 09/11/198500:00 09/12/1985 3.5K-
019867-9 00600:06 09/12/198500:00 09/13/1985 3.5K-
019879,10 00700:06 09/13/198500:00 09/14/1985 3.5K-
0198810,9B,8B 00800:06 09/14/198500:00 09/15/1985 3.5K-
019898B 00900:06 09/15/198500:00 09/16/1985 3.5K-
0199011,12 01000:06 09/16/198500:00 09/17/1985 3.5K-
0199112,13 01100:06 09/17/198500:00 09/18/1985 3.5K-
0199213,14 01200:06 09/18/198500:00 09/19/1985 3.5K-
0199314,15 01300:03 09/19/198500:31 09/20/1985 3.5K-
0199415 01400:33 09/20/198500:00 09/21/1985 3.5K-
0199515,16 01500:04 09/21/198500:02 09/22/1985 3.5K-
0199616,17 01600:04 09/22/198500:02 09/23/1985 3.5K-
0199717 01700:03 09/23/198500:02 09/24/1985 3.5K-
0199817,18 01800:03 09/24/198500:01 09/25/1985 3.5K-
0199918,19 01900:04 09/25/198500:02 09/26/1985 3.5K-
0200019,20 02000:03 09/26/198500:02 09/27/1985 3.5K-
0400120 02100:03 09/27/198500:02 09/28/1985 3.5K-
0400221,22 02200:03 09/28/198517:40 09/28/1985 3.5K-
040031-5 00119:00 09/06/198510:00 09/10/1985 AIR- 5 SEC SWP
040046-10,9B,8B 00210:12 09/10/198507:00 09/15/1985 AIR- 5 SEC SWP
0400510-15 00307:04 09/15/198507:02 09/21/1985 AIR- 5 SEC SWP
0400616-19 00407:08 09/21/198519:42 09/26/1985 AIR- 5 SEC SWP
0400720-22 00520:00 09/26/198518:10 09/28/1985 AIR- 5 SEC SWP
040087 00104:09 09/11/198500:06 09/12/1985 AIR- 8 SEC SWP
040082,3 00116:30 09/07/198500:30 09/09/1985 AIR- 8 SEC SWP
040086 00110:12 09/10/198504:00 09/11/1985 AIR- 8 SEC SWP
040085 00115:50 09/09/198509:37 09/10/1985 AIR- 8 SEC SWP
040084 00101:00 09/09/198515:30 09/09/1985 AIR- 8 SEC SWP
040081 00120:30 09/06/198516:00 09/07/1985 AIR- 8 SEC SWP
0400910 00205:12 09/13/198504:30 09/14/1985 AIR- 8 SEC SWP
040099 00216:04 09/12/198505:02 09/13/1985 AIR- 8 SEC SWP
040098B 00216:09 09/14/198506:58 09/15/1985 AIR- 8 SEC SWP
040098 00200:16 09/12/198516:00 09/12/1985 AIR- 8 SEC SWP
040099B 00204:42 09/14/198516:00 09/14/1985 AIR- 8 SEC SWP
0401010,11-15 00307:00 09/15/198507:00 09/21/1985 AIR- 8 SEC SWP
0401116-19 00407:00 09/21/198522:00 09/25/1985 AIR- 8 SEC SWP
0401219-22 00522:05 09/25/198517:40 09/28/1985 AIR- 8 SEC SWP
040131-4 00118:42 09/06/198502:24 09/09/1985 10K-
040144-7 00202:24 09/09/198515:12 09/11/1985 10K-
040157-10 00315:18 09/11/198503:00 09/14/1985 10K-
0401610,9B,8B,11,12 00403:07 09/14/198512:24 09/16/1985 10K-
0401712-14 00512:28 09/16/198501:30 09/19/1985 10K-
0401814-16 00601:36 09/19/198510:03 09/21/1985 10K-
0401916-17 00710:06 09/21/198523:24 09/23/1985 10K-
0402017-19 00823:30 09/23/198507:12 09/26/1985 10K-
0402119-22 00907:18 09/26/198517:54 09/28/1985 10K-
0402225-28 00107:40 08/31/198515:43 09/01/1985 AIR- 2 SEC SWP
0402325-28 00107:40 08/31/198515:43 09/01/1985 AIR- 5 SEC SWP
0402425-28 00107:40 08/31/198515:43 09/01/1985 AIR- 8 SEC SWP
0402525-28 00107:40 08/31/198515:43 09/01/1985 10K-
040261,2 00119:00 09/06/198518:56 09/07/1985 AIR- 2 SEC SWP
040272,3 00102:00 09/08/198500:45 09/09/1985 AIR- 2 & 4 SEC SWP
040277 00104:09 09/11/198501:15 09/12/1985 AIR- 4 SEC SWP
040276 00110:12 09/10/198504:15 09/11/1985 AIR- 4 SEC SWP
040279 00116:04 09/12/198506:00 09/13/1985 AIR- 4 SEC SWP
040275 00115:50 09/09/198510:00 09/10/1985 AIR- 4 SEC SWP
0402710 00106:17 09/13/198513:30 09/13/1985 AIR- 4 SEC SWP
040274 00100:45 09/09/198515:30 09/09/1985 AIR- 4 SEC SWP
040278 00101:11 09/12/198516:00 09/12/1985 AIR- 4 SEC SWP
0402810-22 00213:37 09/13/198518:10 09/28/1985 AIR- 4 SEC SWP
040291-6 00112:49 08/08/198510:06 08/19/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED.
040306-17 00210:35 08/19/198502:00 08/28/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED.
0403117-28 00302:45 08/28/198515:00 09/01/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED.
040321-5 00118:08 09/06/198521:10 09/09/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED
040335-12 00221:22 09/09/198510:07 09/16/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED
0403412-14 00310:15 09/16/198505:45 09/19/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED
0403514-22 00405:45 09/19/198517:00 09/28/1985 SSS- GLORIA MONITORNOT FLOW PHOTOED

Data and publications on CD-ROM/DVD-ROM:

Inventory ## per setData TypeContentsAuthorYearReport #FormatTitleRemarks
027601/01SSS BTHGLORIA IMAGES19GLORIA GULF OF MEXICO*85028, 85034
051101/01PublicationSSS GEOL BTHY GULF MEXICOPASKEVICH, VALERIE2000OF00-0019GULF MEXICO GLORIA SIDESCAN SONAR GEOLOGIC INTERPRETATION: ARCVIEW DATA COVERAGES
157001/01SSSGLORIA ATLANTIC GEOTIFFPASKEVICH VF20030604INTERNAL ARCHIVE ARCHIVE GLORIA GEOTIFF IMAGES US EAST COAST, GULF MEXICO, CAYMAN ISLANDS, PUERTO RICO AREAS
157101/01SSSGLORIA GULF MEXICO GEOTIFFPASKEVICH VF20030605INTERNAL ARCHIVE ARCHIVE GLORIA GEOTIFF IMAGES GULF MEXICO
016601/01PublicationGLORIA MOSAICS, GEO MAPSTWICHELL, POLLONI, AMBROZIAK, COOK1993DDS-0015CD-ROM ATLAS DEEPWATER US EEZ ATLANTIC, GULF MEXICO, EASTERN CARIBBEAN*82005,85028,85034,85039,87004,87008,87010,87015,
008101/01SSSGLORIA/MOSAIC 1-16PASKEVICH V1995DIGITAL MOSAICS OF THE GLORIA SIDESCAN SONAR DATA OF THE GULF OF MEXICO 1982 AND 1985*2, 3A
015201/01PublicationGLORIA MOSAICS,PASKEVICH1996OF96-0657DIGITAL MOSAICS GLORIA SIDESCAN SONAR DATA GULF OF MEXICO2 COPIES
015301/01PublicationGLORIA SSS, NAVTWICHELL, PASKEVICH1996OF96-0707GLORIA SIDESCAN SONAR FIELD, NAVIGATION DATA GULF OF MEXICO FARNELLA 1982, 1985
280101/01PublicationGIS SEIS SAMP N GULF MEXICOTWICHELL, CROSS, PASKEVICH, HUTCHINSON, WINTERS, *20060808OF 2005-1071GIS SELECTD GEOPHYSICAL AND CORE DATA NORTHERN GULF MEXICO CONTINENTAL SLOPE COLLECTED BY US GEOLOGICAL SURVEY, 2005*DFRN, GYRE; *HART
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