What the heck is a Pocosin?Paul2019-01-28T13:39:02-07:00 Museum exhibits for the North Carolina Museum of Natural Sciences, Raleigh, NC Pocosin environment: cross section. A pocosin is a wetland bog with sandy peat soil and woody shrubs throughout. Pocosin Lakes National Wildlife Refuge, North Carolina. Pocosins are generally found along the Atlantic coastal plain of the United States, from southern Virginia to northern Florida. Sandhill, cross section. The Sandhills or Carolina Sandhills is a 15-60 km wide physiographic region within the U.S. Atlantic Coastal Plain.