A shoaling-upward carbonate sequence in the Dogger (Middle Jurassic) of the Central High Atlas of Morocco

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dc.contributor.advisorWarme, John E.en_US
dc.creatorStanley, Richard Grahamen_US
dc.date.accessioned2018-12-18T21:16:12Zen_US
dc.date.available2018-12-18T21:16:12Zen_US
dc.date.issued1976en_US
dc.description.abstractA late stage of sedimentary infilling of the High Atlas Trough during Dogger (Middle Jurassic) time has been documented in a petrographic study of a 1,2 m-thick sequence of carbonate rocks exposed near Rich, Morocco. The sequence was studied in order to determine the events that led to the establishment of coral reefs in the center of a deeply subsided basin. Within this sequence, five lithologic units are distinguished and described in detail. The bulk of the sequence consists of rhythmically interbedded marls and fine-grained limestones that probably were deposited in quiet, relatively deep water. The hypothesis of progressive shallowing is supported by several lines of evidence, including upward increases in benthic vs. pelagic organisms, shelly vs soft-bodied benthic organisms, and algae and algal-coated particles. The sequence is capped by a 5-1 m-thick horizon of scleractinian coral reefs and coral-rich beds that probably formed in shallow, moderately agitated, well-illuminated marine environments. Evidence from local and regional stratigraphic relationships and insoluble residue analyses suggests that some large reef bodies within this horizon were established on local submarine topographic highs that formed as a result of tectonic activity during Dogger time.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent213 ppen_US
dc.identifier.callnoThesis Geol. 1976 Stanleyen_US
dc.identifier.citationStanley, Richard Graham. "A shoaling-upward carbonate sequence in the Dogger (Middle Jurassic) of the Central High Atlas of Morocco." (1976) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104011">https://hdl.handle.net/1911/104011</a>.en_US
dc.identifier.digitalRICE1637en_US
dc.identifier.urihttps://hdl.handle.net/1911/104011en_US
dc.language.isoengen_US
dc.rightsCopyright 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.en_US
dc.titleA shoaling-upward carbonate sequence in the Dogger (Middle Jurassic) of the Central High Atlas of Moroccoen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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