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Documents Middle Ordovician to Late Silurian Geology Eastern United States.

Slide 1 Middle Ordovician to Late Silurian Geology Eastern United States Slide 2 Middle Ordovician Shallow water limestones and dolomites of Great American Bank change Mudcracks…

Documents Geologic time scale macrae/timescale/timescale.html 4600 My 600 My 65 My.

Slide 1 Geologic time scale http://www.geo.ucalgary.ca/~macrae/timescale/timescale.html 4600 My 600 My 65 My Slide 2 AFRICA SOUTH AMERICA LAURENTIA ANTARCTICA TEXAS BALTICA…