17.—Trilobites from the basalsuperstesMudstones (Ordovician) at Aldons Quarry, near Girvan, Ayrshire

1 January 1976

journal article
research article
Published by Cambridge University Press (CUP) in Earth and Environmental Science Transactions of the Royal Society of Edinburgh

Vol. 69 (17) , 369-423
https://doi.org/10.1017/s0080456800015386

Abstract

The trilobite fauna of the basal Didymograptus superstes Mudstones (Nemagraptus gracilis zone) at Aldons Quarry is described. The fauna is large, consisting of 68 species, of which 12 are new, belonging to 47 genera. The fauna bears a much closer resemblance to that of the Albany mudstones than to that of the platy upper Stinchar Limestone: this is attributed to environmental control. The strong North American stamp of Barr Group faunas is at a maximum: Stenoblepharum, Raymondella, Chomatopyge and Miraspis appear for the first time in the Girvan District.

Keywords

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