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Title Ostracodes as indicators of low-energy versus high-energy marine carbonates, northeastern Yucatan Shelf, Mexico
Creator/Author Krutak, P.R. ; Gio-Argaez, R.
Publication Date1984 Apr 01
OSTI IdentifierOSTI ID: 6528594
Report Number(s)CONF-8405216-
Other Number(s)CODEN: AAPGB
Resource TypeConference
Specific TypeJournal Article
Resource RelationAm. Assoc. Pet. Geol., Bull. ; Vol/Issue: 68:4; AAPG annual convention; 20 May 1984; San Antonio, TX, USA
Research OrgARCO Exploration Co., Lafayette, LA
Subject020200 -- Petroleum-- Reserves, Geology, & Exploration; ;CARBONATE ROCKS-- SEDIMENTATION;MEXICO-- CARBONATE ROCKS; CORRELATIONS;FOSSILS;STRATIGRAPHY
Related SubjectDEVELOPING COUNTRIES;GEOLOGY;LATIN AMERICA;NORTH AMERICA;ROCKS;SEDIMENTARY ROCKS
Description/Abstract Carbonate sediments on the inner Yucatan Shelf occur as textural belts paralleling the shoreline.^Nearshore, high-energy, oolitically coated grains occur in the strait between Isla Mujeres and the mainland.^Nichupte Lagoon, on the lee side of the tombolo connecting Punta Cancun and Cancun, contains fine-grained, low-energy, magnesium-calcite rich mud.^Five widely spaced quantitative (total = live + dead) benthic reconnaissance samples were collected from each of these radically different depositional settings.^Ostracodes (approximately 300/sample) isolated from each sample were speciated, and ternary plots of the first 3 dominant species generated.^Plots from the low-energy Nichupte Lagoon indicate: (1) Cyprideis sp. is the first-order dominant in 80% of these samples, (2) second-order dominants are usually Xestoleberis sp., with some Paranesidea frilled and others, (3) other Paranesidea (frilled and arched) occur as third-order dominants, and (4) the percentage spread among the 5 samples of the first-order dominants is approximately 52%, whereas it is only 24% among the second- and third-order dominants.^Ternary diagrams of the first three dominants in high-energy strait sediments reveal: (1) Paranesidea arched is the first-order dominant in 60% of these samples, (2) second-order dominants are almost equally divided between P. arched and P. elongate, (3) third-order dominants are almost equally divided between P. elongate and Neonesidea longisetosa, and (4) the percentage spread among the 5 samples of the first-order dominants is approximately 32%, whereas it is only about 16% among the second- and third-order dominants.^The smaller spread (32%, 16%) of the high-energy grainstones of the carbonate strait separates these sediments from the greater spread (52%, 24%) of the low-energy logoonal sediments of Nichupte Lagoon.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 497
System Entry Date2001 May 13

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