Acidifying organic materials include peat or sphagnum peat moss. Cuttings then can be rooted in pots of sand and peat moss mixtures. Gleysols and peat bogs occupy poorly drained areas. They created the large Long Meadow out of hilly upland pasture interspersed with peat bogs. The river banks mostly consist of sand, podsol, gleysols, peat and boggy peat soils. The landscape is one of granite with peat bogs overlying it. There are areas of peat bog near the coasts. Soils consisting primarily of peat are known as histosols. There are only two types of soil in the Everglades, peat and marl. Produced peat, sapropel, quartz sand, limestone. Bogs may also be classified by the nutrient content of the peat. What evidence does survive is usually in the form of artefacts recovered from peat bogs. Renewable fuels from plants include firewood, peat and other biofuels. Meshchera and Verkhnevolzhsk Lowlands are rich in peat. In general, fens may change in composition as peat accumulates.