The sedimentary rock representing the uniform or layered unit of detrital grains from 0,1 mm to 2 mm in size (grains of sand) connected by any mineral substance (cement).

On mineral composition of detrital material allocate oligomiktovy and polymictic versions. Carry quartz sandstones (more 90th detrital material makes quartz) to oligomiktovy, polevoshpatovo-quartz, micaceous and quartz, etc. (quartz of 60 — 90%).