Pollen found in the clays near Portland, Maine indicate spruce forests, with low proportions of pines, about 11500 BP.
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The Presumpscot formation is a late Pleistocene glacial deposit of predominantly submarine clays, located along the Maine and New Hampshire coast and inland along their major river valleys.
formation | Command (military formation) | Presumpscot River | Elliot Formation | Lance Formation | Crato Formation | Chinle Formation | Two Medicine Formation | Tamayama Formation | Missing Man Formation (band) | Missing Man Formation | Marcellus Formation | Kirkwood Formation | Gettysburg Formation | Clarens Formation | Whitby Mudstone Formation | Tunbridge Wells Sand Formation | Santana Formation | Phalanx formation | phalanx formation | Mahantango Formation | Leduc Formation | Identity formation | Hanson Formation | Formation (stratigraphy) | formation (stratigraphy) | Formation | Centre International de Formation Européenne | Bakken formation | Yixian Formation |