Despite it’s size, Rhode Island is geologically very interesting. Its topography and pedology are glacial dominated, which results in some very interesting soils. The bedrock of the state is more varied, and the most dominant formation is the Narragansett Basin Formation, which is Carboniferous shale, but there is also Permian age Granite, and some Cambrian age deposits in Jamestown. In the north of the state is the former fault between the North American Plate and the Avalonian Plate, which in the local geologically community is thought to be the Blackstone River.

