Discovery of plate-type scyphocrinoid loboliths in the uppermost P??ídolían-lowermost Lochkovian Upper Setul limestone of Peninsular Malaysia

Autor: Chai Peng Lee
Rok vydání: 2005
Předmět:
Zdroj: Geological Journal. 40:331-342
ISSN: 1099-1034
0072-1050
DOI: 10.1002/gj.1008
Popis: Scyphocrinoid loboliths, the bulbous floats attached to the roots of a group of large Late Silurian to Early Devonian crinoids, were found within the top part of the Upper Setul limestone at two localities, in a band of limestone at Memplam Bay and in limestone blocks from a soil quarry at Guar Jentik, in northwest Peninsular Malaysia. The loboliths belong to the plate type, characterized by having plated chamber walls, few internal chambers and the presence of chamber openings near the axil of each primary root. Plate loboliths belong to species of Marhoumacrinus and Camarocrinus of the uppermost Pridolian to lowermost Lochkovian, and occur generally above cirrus loboliths, which are Pridolian only. Armoured floats are believed to have provided better protection against predators and the physical elements. These loboliths are important for correlation with other occurrences worldwide and especially within the Shan-Thai or SIBUMASU (SinoBurMalayaSumatra) terrane of southeast Asia. Copyright © 2005 John Wiley & Sons, Ltd.
Databáze: OpenAIRE
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