Welcome to Country Auto Sales. We are a full service Massachusetts used car dealer located in Southwick serving the towns of Hampden County, Springfield MA, Worcester MA, Boston MA, Westfield MA, Agawam MA, West Springfield MA, Longmeadow MA, Springfield MA, Chicopee MA, Windsor Locks CT, Holyoke MA, East Longmeadow MA, Easthampton MA, Ludlow MA, South Hadley MA, Somers CT, Wilbraham MA and Ellington CT.
Clastic sedimentary rocks form when individual grains (the sediment), made by fragments of rocks, minerals, or shells, are cemented together (the clastic sediemntary rock). These are the only type of rock that is NOT made simply of crystals, but rather fragments of other materials, broken and then reassembled together.
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks and smaller grains of rock broken off other rocks by physical weathering.Geologists use the term clastic with reference to sedimentary rocks as well as to particles in sediment transport whether in suspension or as bed load, and in sediment deposits.rain size determines the basic name of a clastic sedimentary rock. Grain size varies from clay in shales and claystones; through silt in siltstones; sand in sandstones; and gravel, cobble, to boulder sized fragments in conglomerates and breccias.