Distribution and significance of coarse biogenic and clastic deposits on the Texas inner shelf.

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dc.acquisition-srcen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorMorton, R.A.en_US
dc.contributor.authorWinker, C.D.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T16:55:39Z
dc.date.available2010-02-15T16:55:39Z
dc.date.issued1980en_US
dc.degreeen_US
dc.description15 p.en_US
dc.description-otheren_US
dc.description.abstractSediments of the Texas inner shelf are generally fine grained, coarse clasts (>0.5mm) are uncommon (<1%) over much of the area. Higher concentrations of coarse material, however, occur in discreet areas that apparently represent positions of former deltas. Coarsest constituents are predominantly whole shells and shell fragments with subordinate amounts of lithic clasts. The calcareous skeletal debris represents a mixture or extant shelf fauna and relict brackish water molluscs including Rangia spp. and Crassostrea virginica. Rounded sandstone, limestone, and mudstone clasts up to 7 cm long and caliche nodules are common in some areas. Maps showing 1) coarse fraction percent, 2) distribution of brackish water molluscs, and 3) rock fragments show similar trends outlining ancestral Rio Grande, Brazos-Colorado, and Trinity Deltas; a patchy, arcuate trend between Pass Cavallo and Aransas Pass is enigmatic. Criteria used to determine post-depositional history and possible sources of shell debris for each of the four trends are degree of abrasion, fragmentation, etching, boring, and discoloration.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTexas coasten_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/20095
dc.latitudeen_US
dc.locationNOT AVAILABLE IN-HOUSE.en_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries2317.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesUniv. Tex. Bur. Econ. Geol. Circ. No. 80-6.en_US
dc.subjectdeltasen_US
dc.subjectsedimentsen_US
dc.subjectsediment distributionen_US
dc.subjectsedimentationen_US
dc.subjectshellsen_US
dc.subjectcontinental shelvesen_US
dc.subjectbrackishwater molluscsen_US
dc.subjectRangia sp.en_US
dc.subjectCrassostrea virginicaen_US
dc.subjectbiogenic depositsen_US
dc.subjectclasticsen_US
dc.titleDistribution and significance of coarse biogenic and clastic deposits on the Texas inner shelf.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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