georefid:1984-029704SEDIS Publication Catalogue
ana.macario@awi.de
http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=1984-029704<gco:CharacterString>Early Cretaceous platform re-entrant and escarpment erosion in the Bahamas</gco:CharacterString>1984-01-01publicationgeorefid:1984-029704Schlager, WolfgangUniv. Miami, Fisher Island Stn., Miami, FL, United StatesauthorAustin, J. A., Jr.Univ. Tex., United StatesauthorCorso, W.Univ. Erlangen, Federal Republic of GermanyauthorMcNulty, Charles L.Nathist. Mus., SwitzerlandauthorFluegel, E.Marathon Res. Lab., United StatesauthorRenz, O.authorSteinmetz, J. C.authorGeological Society of America (GSA), Boulder, CO, United StatespublisherdocumentHardcopyGeology (Boulder)12 (3)147-150A multichannel, 24-fold seismic profile crossing the Bahama Escarpment south of San Salvador is tied stratigraphically to Deep Sea Drilling Project Site 99 and dredge hauls on the eroded platform slopes in the Bahamas. Conclusions: (1) a deep-water sequence crops out in Exuma Canyon west of the Bahama Escarpment between 2,6000 and 3,800 m and includes Valanginian through Cenomanian chalk and limestone presumably deposited in a re-entrant between the platforms; (2) beneath these carbonates the seismic data indicate a possible reef structure at 5,700 m and prograding clinoforms suggestive of rapidly deposited rift(?) sediments below 6,500 m; (3) the Bahama Escarpment, like the Blake Escarpment, is an erosional slope exposing Jurassic(?) to Early Cretaceous back-reef limestones; geometry indicates an erosional retreat of ca. 5 km of the base of the escarpment since Early Cretaceous time; (4) major faults may separate the re-entrant sequence from the ridge forming the escarpment and may also define Exuma Canyon and the escarpment itself.--Modified journal abstract.completedOceanographyAtlantic OceanBahama EscarpmentBahamasBlake Plateaubottom featurescarbonate rocksCaribbean regionCretaceousDeep Sea Drilling Projectdeep-sea sedimentationdepth indicatorsdredged samplesDSDP Site 99environmental analysisExuma Canyonfaultsgeophysical methodsgeophysical surveysLeg 11Lower Cretaceousmarine sedimentationMesozoicmultichannel filtersNorth American AtlanticNorth Atlanticocean floorsoceanographypaleogeographyprocessesreflection methodsscarpssedimentary rockssedimentationseismic methodssubmarine canyonssurveysWest Indiesurn:org.iodp:exp:11urnlargerWorkCitationcampaignurn:org.iodp:exp:11:site:99urnlargerWorkCitationstudyurn:org.iodp:exp:11urnlargerWorkCitationcampaignEnglishgeoscientificInformation-80.000020.00000.000075.0000BahamasNorth AtlanticUniv. Tex., Inst. Geophys. Contrib. No. 556