While some soils develop by weathering of the underlying bedrock (residual soils), many soils form from material that has been transported from a different area. The second most important factor of soil formation in the New England region is the geologic material in which the soil formed. Parent material governs what type of minerals are in the soil, the color of the soil, and influence many soil properties such as permeability, infiltration, and pH.
The following slides discuss some of the different soil parent materials in New England.
Links: Geology of Plymouth County | Geology of Barnstable County | Link to USGS Glossary of Geologic Terms