dc.contributor.advisor	Wilson, James Lee
dc.creator	Spaw, Richard Hoencke
dc.date.accessioned	2018-12-18T21:16:35Z
dc.date.available	2018-12-18T21:16:35Z
dc.date.issued	1977
dc.description.abstract	Knowledge of the depositional history of Cozumel Island is important for an understanding of the tectonics of the block-faulted eastern Yucatan and Belize continental margin. Basic information was derived from field reconnaissance and petrographic and mineralogic descriptions of thin sectioned and x-rayed samples. Two older Pleistocene, ten late Pleistocene, and one Holocene shallow-water carbonate facies are differentiated by their geometries and positions, megafauna, sedimentary structures, textures, carbonate grain-types, mineralogies and cements. The two older Pleistocene facies represent patch reef and sandy backreef environments of deposition. The late Pleistocene facies were deposited in windward and leeward coral reef, reef pass, seagrass-stabilized backreef, oolite shoal, storm channel, beach, and dune environments. Beachrock is the only Holocene rock on the island. Previously described 125, + 15, B.P. reef, backreef, and beachnearshore facies on the eastern Yucatan coast are in the same positions as the late Pleistocene facies on Cozumel Island; thus, the late Pleistocene Cozumel facies probably were deposited during the Sangamon Interglacial. A world-wide sea level fluctuation curve compiled from the literature is applied to deposition on Cozumel. Rocks from the island record two periodsof submergence with associated shallow-water carbonate deposition, and two intervening periods of emergence with associated subaerial vadose diagenesis. In reconstructing the depositional history of the island, it is determined that no tectonic activity has occurred since the latter part of the middle Pleistocene.
dc.format.digitalOrigin	reformatted digital
dc.format.extent	196 pp
dc.identifier.callno	Thesis Geol. 1977 Spaw
dc.identifier.citation	Spaw, Richard Hoencke. "Late Pleistocene stratigraphy and geologic development of Cozumel Island, Quintana Roo, Mexico." (1977) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104042">https://hdl.handle.net/1911/104042</a>.
dc.identifier.digital	RICE1668
dc.identifier.uri	https://hdl.handle.net/1911/104042
dc.language.iso	eng
dc.rights	Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.title	Late Pleistocene stratigraphy and geologic development of Cozumel Island, Quintana Roo, Mexico
dc.type	Thesis
dc.type.material	Text
thesis.degree.department	Earth Science
thesis.degree.discipline	Natural Sciences
thesis.degree.grantor	Rice University
thesis.degree.level	Masters
thesis.degree.name	Master of Arts

Late Pleistocene stratigraphy and geologic development of Cozumel Island, Quintana Roo, Mexico

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