Downslope sediment transport processes and sediment distributions at the East Breaks, Northwest Gulf of Mexico

dc.contributor.advisorBehrens, E. W. (Earl William), 1935-
dc.creatorPiper, James Nolan
dc.date.accessioned2024-01-24T01:28:37Z
dc.date.available2024-01-24T01:28:37Z
dc.date.issued1997
dc.description.abstractHigh-frequency 3.5-kHz acoustic reflection data and piston cores collected during 19 research and student-training cruises were used to interpret sediment distribution and downslope sediment transport processes involved in the formation of the two lobes of the East Breaks slide. The distribution of depositional systems was mapped by developing an acoustic facies classification system from 28,000 kms of high-resolution 3.5-kHz acoustic reflection data. Bathymetry and piston core data were also used in interpretations. Fourteen acoustic facies were recognized. Previous investigations of the near-surface geomorphology of the East Breaks slide interpreted this site as having been formed by a single mass-wasting event at the terminous of a late Wisconsinan shelf-edge delta. According to these interpretations, after initiation, this slide/slump propagated downslope and divided into two major lobes as it encountered a salt diapir-induced bathymetric high. This study shows that the two lobes are genetically separate. The formation involved the two major types of downslope sediment transport mechanisms that dominate the northern Gulf of Mexico: gravity-driven slide/slump/debris flows and turbidity currents. The upper part of the western lobe was produced by mass wasting, and the eastern lobe was formed by channelized turbidity currents
dc.description.departmentMarine Science
dc.format.mediumelectronicen
dc.identifier.urihttps://hdl.handle.net/2152/123487
dc.identifier.urihttps://doi.org/10.26153/tsw/50283
dc.language.isoen
dc.relation.ispartofUT Electronic Theses and Dissertationsen
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.rights.restrictionOpen
dc.subjectMarine sediments
dc.subjectGulf of Mexico
dc.subjectSediment transport
dc.subjectSediment mapping
dc.subjectMass-wasting
dc.subjectTurbidity currents
dc.subjectGeomorphology
dc.subject.lcshMarine sediments--Mexico, Gulf of
dc.subject.lcshSediment transport--Mexico, Gulf of
dc.subject.lcshSediment transport--Mexico, Gulf of--Maps
dc.subject.lcshMass-wasting--Mexico, Gulf of
dc.subject.lcshGeomorphology--Mexico, Gulf of
dc.subject.lcshTurbidity currents
dc.titleDownslope sediment transport processes and sediment distributions at the East Breaks, Northwest Gulf of Mexico
dc.typeThesis
dc.type.genreThesisen
thesis.degree.departmentMarine Science
thesis.degree.disciplineMarine Science
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMasters
thesis.degree.nameMaster of Arts

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