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Sunken Meadow Mbr Yorktown Fm. Pliocene Yorktown Formation at Carters Grove Bluffs along the James River Virginia Rock hammer for scale Taken Own Jstuby en Jstuby Original upload log page en SunkenMeadowMbrYorktownFm Jstuby bytes no Meadow Member of Pliocene Yorktown Formation at Carters Grove Bluffs along the James River