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Dorcadospyris alata

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Series: GSA Memoirs
Published: 01 January 1993
DOI: 10.1130/MEM182-p255
... of the silica-bearing sequence lies within Zone N7 of Banner and Blow (1965). The upper limit of the calcareous-siliceous facies lies within the upper part of the Dorcadospyris alata zone, or early middle Miocene. This age is indicated by the presence of the nominate radiolarian taxon whose full range...
Journal Article
Published: 01 July 1999
Micropaleontology (1999) 45 (3): 251-277.
... and Kamorta islands have been studied. One-hundred-twenty species belonging to the Dorcadospyris alata Zone ( approximately 15-13 Ma) are herein reported and illustrated. This is the first detailed record of Early Middle Miocene radiolarian taxa from land-based sections of Andaman-Nicobar Islands...