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Geochronological Investigations on Rocks from North Wales

✍ Scribed by FITCH, F. J.; MILLER, J. A.; MENEISY, M. Y.


Book ID
109630178
Publisher
Nature Publishing Group
Year
1963
Tongue
English
Weight
349 KB
Volume
199
Category
Article
ISSN
0028-0836

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In North Wales, Cruziana semplicata (Salter) is recorded from three otherwise unfossiliferous localities and Teichichnus sp. (Seilacher) and Phycodes circinatum (Richter) are shown to be widely distributed within the lower Arenig (Didymograprus extensus zone) sediments. P. circinaturn is also record