Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California

Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California

Bibliographic Details
Main Author: Reardon, Timothy W.
Language:English
Published: Oberlin College Honors Theses / OhioLINK 1995
Subjects:
Geology
Baja
California
Bahia Concepcion
lithofacies
sediment
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411645561
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-oberlin14116455612021-08-03T06:27:40Z Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California Reardon, Timothy W. Geology Baja California Bahia Concepcion lithofacies sediment Neogene strata in Baja California preserve a record of extensional basins produced during early phases of rifting in the Gulf of California. This actualistic study addresses the feasibility of using Holocene sediments of Bahia Concepcion -- a rift basin forming a shallow marine bay In southern Baja California -- as analogues for the interpretation of Neogene strata in the Pliocene Loreto Basin. Three major lithofacies occur in Bahia Concepcion: Mud sediments dominate most of the central portion of the bay. Moderately sorted sands occur adjacent to shorelines formed by coalesced alluvial fans and a broad alluvial plain, while carbonate sands dominate semi-restricted embayments and rocky shorelines. The distribution of these lithofacies is largely attributable to local geology and changes in base level. Eastern alluvial fans sourced in the foot-wall of a normal fault on the Concepcion Peninsula shed clastic sand far into the bay. In contrast, drainages on the west side of the bay appear to be backfilling in response to Holocene eustatic sea-level rise, resulting in clastic-starved conditions favorable to carbonate production. Comparisons of modern sediments of Bahia Concepcion with those of the Pliocene Loreto Basin suggest that modern lithofacies are most useful in interpreting sediments deposited during transgressive episodes. 1995 English text Oberlin College Honors Theses / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411645561 http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411645561 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Geology
Baja
California
Bahia Concepcion
lithofacies
sediment
spellingShingle Geology
Baja
California
Bahia Concepcion
lithofacies
sediment
Reardon, Timothy W.
Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California
author Reardon, Timothy W.
author_facet Reardon, Timothy W.
author_sort Reardon, Timothy W.
title Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California
title_short Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California
title_full Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California
title_fullStr Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California
title_full_unstemmed Modern Marine Sediments of Bahia Concepcion : Patterns, Processes, and Potential Analogues to Neogene Rift Basin deposits of Baja California
title_sort modern marine sediments of bahia concepcion : patterns, processes, and potential analogues to neogene rift basin deposits of baja california
publisher Oberlin College Honors Theses / OhioLINK
publishDate 1995
url http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411645561
work_keys_str_mv AT reardontimothyw modernmarinesedimentsofbahiaconcepcionpatternsprocessesandpotentialanaloguestoneogeneriftbasindepositsofbajacalifornia
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