NDLI: Distribution of gravel-sized empty tests of large benthic foraminifers as practical depositional indicators in tropical reef and shelf carbonate environments

Content Provider	Springer Nature Link
Author	Fujita, Kazuhiko Kato, Shinpei
Copyright Year	2011
Abstract	To explore the utility of gravel-sized tests of large benthic foraminifers (LBFs) as practical paleoenvironmental indicators of tropical reef and shelf carbonate environments, depth and spatial distributions of gravel-sized empty tests of LBFs were examined using 39 surface sediment samples collected from depths shallower than 200 m off the west coast of Miyako Island (Ryukyu Islands, northwest Pacific). Distributions of the LBF tests were mainly related to water depth, topography, and substrate type. Q-mode cluster analysis based on the binary (presence/absence) data of LBF associations (4–2-mm size fraction) clearly delineates four depositional environments: bay, back reef to fore reef, flat shelf, and shelf slope. Application of this modern dataset to fossil LBF data from larger foraminiferal limestones of the Pleistocene Ryukyu Group indicate that a test section was deposited in an outer flat shelf at depths between 54 and 99 m. Comparisons of these results with previous reports suggest that our foraminiferal analysis using gravel-sized tests is methodologically easier than conventional analyses including smaller sized tests to distinguish similar levels of depositional environments. However, taxonomic and environmental similarities make the applicability of this dataset to fossil LBF data from Quaternary tropical carbonate environments in the northwest Pacific.
Starting Page	525
Ending Page	541
Page Count	17
File Format	PDF
ISSN	01729179
Journal	Facies
Volume Number	57
Issue Number	4
e-ISSN	16124820
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-01-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Large benthic foraminifer Depositional environment Paleo-water depth Ryukyu Islands
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

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