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land soils fossils

bedrock unweathered rock that lies below the subsoil; some material in the soil may have come from the bedrock
delta a large mass of sediment deposited at the mouth of a river
deposition the dropping of sediment by wind, water, ice or gravity
erosion the movement of weathered rock material from one place to another
fossil the remains of a plant or animal that lived long ago and is preserved in some way
glacier a large mass of slow moving ice that flows down a slope
humus the decayed remains of plants and animals
paleontologist a scientist who studies fossils and organisms that lived long ago
soil bits of rock, minerals, and material that were once part of once living things
subsoil the bottom layer of soil, it contains small pieces of rock and very little humus. The soil particles are larger and lighter in color than topsoil
topsoil the uppermost level of the soil, best soil to grow plants because it contains a large amount of humus which provides nutrients needed for plants to grow properly. The particles are dark and small.
weathering the slow breaking apart or wearing away of rock into smaller pieces