Pocosins are generally found along the Atlantic coastal plain of the United States, from southern Virginia to northern Florida. These areas typically occur in broad, low-lying shallow basins that do not drain naturally. Pocosins are formed by the accumulation of organic matter, resembling black muck, which builds up over thousands of years. This accumulation of material causes the soil to be highly acidic and nutrient-deficient.
Original article: What is a pocosin?