Clastic rock rich in lithics are called lithic sandstones. Siliciclastic sedimentary rocks are composed of mainly silicate particles derived by the weathering of older rocks and pyroclastic volcanism. While grain size, clast and cementing material (matrix) composition, and texture are important factors when regarding composition, siliciclastic sedimentary rocks are classified according to grain size into three major categories; conglomerates, sandstones, and mudrocks. The term clay is used to classify particles smaller than .0039 millimeters. However, term can also be used to refer to a family of sheet silicate minerals. Silt refers to particles that have a diameter between .062 and .0039 millimeters.
Emery, Utah identify archaeological sites as Fremont, is not very different from that made by other Southwestern groups, nor are its vessel forms and designs distinct. What distinguishes Fremont pottery from other ceramic types is the material from which it is constructed. Variations in temper, the granular rock or sand added to wet clay to insure even drying and to prevent cracking, have been used to identify five major Fremont ceramic types. They include Snake Valley gray in the southwestern part of the Fremont region, Sevier gray in the central area, Great Salt Lake gray in the northwestern area, and Uinta and