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Diagram showing the relationships of the Ordovician sandstones to the Silurian limestones on the Vlightberg at Rondout, New York.

Ordovician Sandstone and Silurian Limestone

Diagram showing the relationships of the Ordovician sandstones to the Silurian limestones on the Vlightberg…

Diagram showing the relationships of the Ordovician sandstones to the Silurian limestones on the Vlightberg at Rondout, New York before the last folding.

Ordovician Sandstone and Silurian Limestone

Diagram showing the relationships of the Ordovician sandstones to the Silurian limestones on the Vlightberg…