TY - JOUR
T1 - Composition and spatial distribution of microencrusters and microbial crusts in upper Jurassic-lowermost Cretaceous reef limestone (Torinosu Limestone, southwest Japan)
AU - Shiraishi, Fumito
AU - Kano, Akihiro
N1 - Funding Information:
Acknowledgement The authors are indebted to Dr. C. Helm (Hannover University) and Dr. D. Schmid (München University) for their useful comments and careful review of the manuscript. H. Ishisako and Y. Suda (Hiroshima University) provided useful advice for preparing large thin-sections. Earlier version of the manuscript was carefully reviewed by Dr. L. Marincovich (California Academy of Science). T. Takahashi (Shirokawa Geology Museum) and M. Takei (Niigata University) provided significant support for our fieldwork. Prof. H. Sano (Kyushu University) financially supported our study by Grant-in-Aid for Scientific Research from the Japanese Ministry of Education and Science (NO. 13440149).
PY - 2004/8
Y1 - 2004/8
N2 - Tethyan microencrusters and microbial crusts, most of them previously unknown in Japanese Mesozoic biotas, are present in the uppermost Jurassic-lowermost Cretaceous Torinosu Limestone distributed in southwestern Japan. They construct reefal facies together with reef-forming metazoans. Bacinella irregularis and Lithocodium aggregatum are quantitatively most important, while subordinate constituents include Thaumatoporella parvovesiculifera, Koskinobullina socialis, Iberopora bodeuri, Girvanella sp. and "Tubiphytes" morronensis. They are especially common in the shallow-water reefal facies, but appear micritic in outcrops. Microencrusters and microbial crusts can only be recognized in thin sections, and they grow around the reef building metazoans and form bindstone. Each microencruster exhibits some specific spatial distribution associated with its paleoecology. Similarities with the taxonomic composition of the upper Jurassic Tethyan microencruster association imply that the community extended geographically at least to the Tethyan gateway where the Japanese Island Arc was located.
AB - Tethyan microencrusters and microbial crusts, most of them previously unknown in Japanese Mesozoic biotas, are present in the uppermost Jurassic-lowermost Cretaceous Torinosu Limestone distributed in southwestern Japan. They construct reefal facies together with reef-forming metazoans. Bacinella irregularis and Lithocodium aggregatum are quantitatively most important, while subordinate constituents include Thaumatoporella parvovesiculifera, Koskinobullina socialis, Iberopora bodeuri, Girvanella sp. and "Tubiphytes" morronensis. They are especially common in the shallow-water reefal facies, but appear micritic in outcrops. Microencrusters and microbial crusts can only be recognized in thin sections, and they grow around the reef building metazoans and form bindstone. Each microencruster exhibits some specific spatial distribution associated with its paleoecology. Similarities with the taxonomic composition of the upper Jurassic Tethyan microencruster association imply that the community extended geographically at least to the Tethyan gateway where the Japanese Island Arc was located.
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U2 - 10.1007/s10347-004-0022-9
DO - 10.1007/s10347-004-0022-9
M3 - Article
AN - SCOPUS:4544323250
VL - 50
SP - 217
EP - 227
JO - Facies
JF - Facies
SN - 0172-9179
IS - 2
ER -