The glaciers left bogs and small lakes and the flat Erie Plain along the Lake Erie shore. The Glaciated Allegheny Plateau southeast of Cleveland included steep Appalachian Mountains foothills that thousands of years ago had a dense Beech-Maple forest. By the time that Europeans made contact with Native Americans, the Erie Plain had wide river estuaries, coastal marshes, small prairies, and a mixed oak forest. The Central Till Plain had areas of native beech-oak-hickory woodland and rolling terrain of glacial soils.: