- Taconian period
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период таконской складчатости
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
Martinsburg Formation — A sample of the Martinsburg shale from the Pennsylvania Turnpike (Northeast Extension) at mile post 66. The Ordovician Martinsburg Formation (Om) is a mapped bedrock unit in Pennsylvania, New Jersey, Maryland, Virginia, and West Virginia. It is… … Wikipedia