<Tr> <Th_colspan="2"> Geology </Th> </Tr> <Tr> <Th> Type of rock </Th> <Td> Metamorphic </Td> </Tr> <P> The Berkshires (locally / ˈbɜːrkʃɪərz, - ʃərz /) are a highland geologic region located in the western parts of Massachusetts and Connecticut . The term "Berkshires" is normally used by locals in reference to the portion of the Vermont - based Green Mountains that extends south into western Massachusetts; the portion extending further south into northwestern Connecticut is locally referred to as either the Northwest Hills or Litchfield Hills . </P> <P> Also referred to as the Berkshire Hills, Berkshire Mountains, and Berkshire Plateau, the region enjoys a vibrant tourism industry based on music, arts, and recreation . Geologically, the mountains are a range of the Appalachian Mountains . </P>

Where are the berkshire hills located in massachusetts