Graptolite shale | Article about graptolite shale by The Free Dictionary
graptolite shale[′grap·tə‚līt ′shāl]
Shale containing an abundance of extinct colonial marine organisms known as graptolites.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Available geological data indicate that the Lower Silurian graptolite shales
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Metallogenesis of early Paleozoic graptolite shales
from the Graefenthal Horst (Northern Bavaria-Federal Republic of Germany): Economic Geology, 81, 889-903.
ascensus at the base of member 74 within a continuous succession of graptolite shales
and 1.5 m above the level of incoming of the post-glacial transgression (Fig.