sentences:  The St. Francis Sunken Lands Wildlife Management Area, which preserves some of the bottomland hardwood forest typical of this ecoregion prior to development for row agriculture lies east of Bay along the St. Francis River.Located at 35.756882,-90.56504, there are only 2 remaining mounds of society who inhabited the area between 1200 and 1400AD.The Bay group itself culturally belongs to the Lawhorn Phase, a society which existed along both sides of the St. Francis River north of Marked Tree, Arkansas.