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XXVI.—On Some Lower Carboniferous Equisetineæ from the Clyde Area* I. Protocalamostachys arranensis gen. et sp. nov.—a hitherto undescribed Type of Strobilus. II. The Nodal Structure of Asterocalamites Göpperti Solms sp.

Published online by Cambridge University Press:  06 July 2012

John Walton
John Walton
Affiliation:
University of Glasgow.
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Extract

Among the numerous fragments of plants found inside the fossil hollow tree stumps of Lepidophloios wünschianus Carr. from the Calciferous Sandstone Series in the island of Arran (Walton, 1935, p. 313) are two small portions of a strobilus. These fragments are embedded in the calcite matrix, and as they are separated from one another by a distance of only a few millimetres it is possible that they are parts of one strobilus. They have suffered considerable maceration and distortion before petrification occurred. A series of over 54 peel sections transverse to the axes of the two fragments and a series of 80 longitudinal sections through one of them were prepared. The longitudinal sections were made from 4 mm. of the block of material. Each section therefore used on an average 0·05 mm. of the block.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 61 , Issue 3 , 1949 , pp. 729 - 736
Copyright
Copyright © Royal Society of Edinburgh 1949

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