Recent sedimentary facies of isolated carbonate platforms, Belize-Yucatan System, Central America
Entry ID: SEPM_JSR_ISO_CARBS

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Summary
Abstract: Distribution of recent sedimentary facies is significantly
different in four closely spaced, isolated carbonate platforms off the
coasts of Belize and Yucatan (SE Mexico). These differences are
largely controlled by variations in submarine topography, which are
likely the result of differential subsidence and karstification from
platform to platform. A variety of depositional styles and patterns is
found in platform interiors that developed during the same Holocene
sea-level rise. Composition and texture of surface sediment samples
were used to define four major sediment types and to distinguish nine
depositional environments within the platforms. Facies maps are based
on analysis of 454 sediment samples and high-resolution satellite
imagery. Glovers Reef is characterized by a circular facies
distribution. The nearly continuous reef margin is composed of a
coral--red coralline algae--Halimeda grainstone. Mixed nonskeletal
(peloidal)/skeletal wackestones and packstones are present in shallow
lagoon parts (< 5 m water depth) behind the margin. The deep interior,
from 5 to 18 m water depth, is characterized by
mollusk--foram--Halimeda wackestones with over 860 patch reefs of
coral--red algae--Halimeda--mollusk packstones. Lighthouse Reef also
has a coral grainstone and coral--red algae--Halimeda grainstone rim,
but the facies distribution in the interior is strongly
asymmetrical. The 8-m-deep eastern lagoon is floored by
mollusk--foram--Halimeda wackestones and packstones; the 3-m-deep
western lagoon has the mixed peloidal/skeletal wackestone to
grainstone facies. A linear trend of coalescing patch reefs and
skeletal grainstone facies separates the two lagoons. Banco Chinchorro
is similar to Lighthouse Reef, inasmuch as facies distribution
patterns of the interior are strongly
asymmetrical. Mollusk--foram--Halimeda wackestones--grainstones are
present in eastern lagoon areas, whereas shallow (< 5 m) western parts
of the lagoon are composed of mixed peloidal/skeletal grainstones,
packstones, and wackestones. Most of Turneffe Islands is protected on
the east by Lighthouse Reef. Accordingly, Turneffe has a narrower reef
and skeletal grainstone rim than the other two platforms. Restricted
interior lagoons are up to 8 m deep, and are enclosed by wide mangrove
rims and surface sediments dominated by Halimeda-rich wackestone rich
in organic matter. Coral patch reefs are absent. In contrast, the
unprotected northernmost part of Turneffe has a wide reef and
grainstone rim and the open lagoon area consists of
mollusk--foram--Halimeda wackestones--packstones with abundant patch
reefs.

Related URL
Link: GET DATA
Description: This is the location from which the two data sets may be
viewed/downloaded.
File "gischlerc835.xls" contains the Latitude-Longitude coordinates of
individual samples.
File "gischleratollsedall.xls" contains the composition and texture
data of individual samples.


Geographic Coverage
 N: 19.0 S: 16.0  E: -87.0  W: -88.0
 Min Depth: 0 M  Max Depth: 18 M

Data Set Citation
Dataset Originator/Creator: Gischler, Eberhard and Anthony J. Lomando
Dataset Title: Recent sedimentary facies of isolated carbonate platforms, Belize-Yucatan System, Central America
Dataset Series Name: Journal of Sedimentary Research
Dataset Release Date: 1999-05-01
Dataset Publisher: SEPM
Issue Identification: Volume 69(3)
Data Presentation Form: Spreadsheet
Online Resource: http://www.sepm.org/archive/index.html


Paleo_Temporal_Coverage
Chrono Unit:


Location Keywords
CONTINENT > NORTH AMERICA > CENTRAL AMERICA > BELIZE


Data Resolution
Latitude Resolution: 1 second
Longitude Resolution: 1 second
Vertical Resolution: 1 m


Science Keywords
OCEANS >COASTAL PROCESSES >BEACHES    [Definition]
OCEANS >COASTAL PROCESSES >CORAL REEFS    [Definition]
OCEANS >COASTAL PROCESSES >LAGOONS    [Definition]
OCEANS >COASTAL PROCESSES >SEA LEVEL RISE    [Definition]
OCEANS >COASTAL PROCESSES >SEDIMENT TRANSPORT    [Definition]
OCEANS >COASTAL PROCESSES >SEDIMENTATION    [Definition]
OCEANS >MARINE SEDIMENTS >BIOGENIC SEDIMENTS >CARBONATE SEDIMENTS    [Definition]
OCEANS >MARINE SEDIMENTS >SEDIMENT COMPOSITION    [Definition]
OCEANS >MARINE SEDIMENTS >SEDIMENTARY TEXTURES >SEDIMENT GRAIN SIZE    [Definition]
OCEANS >MARINE SEDIMENTS >SEDIMENT TRANSPORT    [Definition]
OCEANS >MARINE SEDIMENTS >STRATIGRAPHIC SEQUENCE    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MACROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >STRATIGRAPHIC SEQUENCE    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >SEDIMENTARY ROCKS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >SEDIMENTS    [Definition]
SOLID EARTH >TECTONICS >PLATE TECTONICS >STRATIGRAPHIC SEQUENCE    [Definition]
BIOLOGICAL CLASSIFICATION >ANIMALS/INVERTEBRATES    [Definition]
BIOSPHERE >AQUATIC ECOSYSTEMS >MARINE HABITAT    [Definition]


ISO Topic Category
BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Access Constraints
None


Use Constraints
Please use the following to cite the data:
Gischler, Eberhard and Anthony J. Lomando, Recent sedimentary
facies of isolated carbonate platforms, Belize-Yucatan System, Central
America, JSR Volume 69(3), May 1999.


Keywords
CARBONATE PLATFORM
COARSE FRACTION
CORAL
DEPOSITIONAL ENVIRONMENTS
FACIES
FACIES DETERMINATION
FORAMS
GEOLOGY
GRAIN SIZE
MATRIX
MOLLUSCKS
REEFS
SEDIMENTOLOGY
STRATIGRAPHY
YUCATAN


Data Set Progress
COMPLETE


Originating Center
SEPM


Data Center
Society for Sedimentary Geology    [Information]
Data Center URL: http://www.sepm.org/archive/index.html
Dataset ID: gischleratollsedall.xls
Dataset ID: gischlerc835.xls

Data Center Personnel
Name: SEPM
Phone: 800-865-9765 (USA)
Phone: 918-610-3361 (Worldwide)
Fax: 918-621-1685
Email: foundation at sepm.org
Contact Address:
6128 East 38th Street, Suite #308
City: Tulsa
Province or State: OK
Postal Code: 74135-5814
Country: USA



Distribution
Distribution_Media: Online HTTP
Distribution_Format: xls
Fees: None


Personnel
EBERHARD GISCHLER
Role: INVESTIGATOR
Phone: 49-69-798 25136
Fax: 49-69-798 22958
Email: gischler at em.uni-frakfurt.de
Contact Address:
Geologisch-Paldontologisches Institut
Universitdt Frankfurt am Main
Senckenberganlage 32--34
City: Frankfurt am Main
Postal Code: 60054
Country: Germany


GENE R. MAJOR
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov


ANTHONY J. LOMANDO
Role: INVESTIGATOR
Contact Address:
Chevron Overseas Petroleum Inc.
6001 Bollinger Canyon Road
City: San Ramon
Province or State: California
Postal Code: 94583
Country: USA


Publications/References
Recent sedimentary facies of isolated carbonate platforms,
Belize-Yucatan system, Central America, by E. Gischler and
A.J. Lomando, published in Journal of Sedimentary Research, vol. 69
(3): pp. 947-963, 1999.

Creation and Review Dates
DIF Creation Date: 2000-05-26
Last DIF Revision Date: 2006-10-13

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