In the centre of the folds fossiliferous beds with crinoids have been found, and the black slates at the top of the series contain Myophoria and other fossils, indicating that the rocks are of Triassic age. [Please select]
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We know this because the selfsame ancient eroded surface which is exposed in the Laurentian highland is found dipping down under the oldest known fossiliferous rocks. [Please select]
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Professor Hitchcock gave the name of Champlain to the fossiliferous clays associated with the till of the Atlantic coast. [Please select]
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