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I.—On the Species of Brachiopoda that Characterize the “Grès Armoricain” of Brittany, together with a few Observations on the Budleigh Salterton “Pebbles.”

Published online by Cambridge University Press:  01 May 2009

Thomas Davidson
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Extract

During the past twelve months I have devoted much time to the careful study of those questions that relate to the probable source of derivation of the sandstone and quartzite boulders or “pebbles” that were drifted and accumulated in the neighbourhood of Budleigh Salterton by “Bunter” waters. The detailed results of my investigations will appear in my forthcoming Devonian Supplement. Cornwall and North Devon having been pointed at, as a probable source of derivation, I considered it necessary to study the rocks and fossils that exist in those portions of Great Britain, as well as those that occur in Normandy and Brittany, on the other side of the Channel.

Type
Original Articles
Information
Geological Magazine , Volume 7 , Issue 8 , August 1880 , pp. 337 - 343
Copyright
Copyright © Cambridge University Press 1880

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References

page 337 note 1 I have devoted a quarto plate to the illustration of the Cornish species, and four to the delineation of those that occur at Budleigh Salterton.

page 338 note 1 Assoc. Franc. pour l'avancement de la Science, Congrès de Nantes, 1875, Bull. Soc. Linn de Normandie, 3 ser. vol. i. p. 5, 1877;Google Scholar Congres du Havre, 1877, Bull. Soc. Geol. de France, 3 ser. t. iv. p. 583, 1876;Google Scholar Moriere, M. J., Note sur la gres de Bagnoles, Bull. Soc. Linn, de Normandie, 3 ser. vol. ii. 1868.Google Scholar

page 339 note 1 Out of the thirty-six new species of Brachiopoda merely named or briefly described by Marie Rouault, only one was figured by him, viz. the Orthis Berthosi. This want of illustrations has been the cause of much unavoidable misconception and errors in identification. The public had not even the advantage of being able to consult the original types, which are not exhibited in the Museum at Rennes.

page 340 note 1 M. Lebesconte informs me that fossiliferous sandstones and quartzites have been found in the following localities, in Normandy and Brittany—1. Grès Armorieain, Pontréan, Pléchatel, Guichen, Sion, Chateaubriant, Provostais, Laillé. 2. Grès de May, La Bouexière, St. Germain-sur-Ille, May, Jusques. Grès Devonien, Gahard, St. Aubin d'Aubigné.