Sketch of the Structure of parts of North and South Wales

Abstract
Summary: The fossil evidences here cited indicate— 1. That the sandstones skirting the Longmynds are the upper beds of the Caradoc. 2. That they were deposited under peculiar local conditions. 3. That they were deposited around the margin of land. 4. That in all probability they were deep-sea deposits around high and steep land. 5. That the land was of Llandeilo flags or older rocks. 6. That they are in sequence with the limestone bands at the base of the Wenlocks. 7. That part of the Meifod fossiliferous beds are in a lower parallel, and probably Middle Caradoc.

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