Palaeontographica Americana

Palaeontographica Americana

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(2007; they did not discuss specimens described and illustrated in Denkler 86 Harris, 1988), then the Helderberg excursion would have to ... to the It-riodus woschmidti group occur 1.0 m above the base of the Thacher Member. ... If the FAD of Dvorakia philipi? in the lower Helderberg Group approximates the level of the FAD of that species in west Texas ... New York State Museum and Science Service publications since 1962 is at/ near the base of the Helderberg Group, either withinanbsp;...

Title:Palaeontographica Americana
Publisher: - 2009


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