Simple Lithology

sand

http://resource.geosciml.org/classifier/cgi/lithology/sand

broader clastic sediment
narrower sand
sand size sediment
narrower sand
definition Clastic sediment in which less than 30 percent of particles are gravel (greater than 2 mm in diameter) and the sand to mud ratio is at least 1. More than half of the particles are of epiclastic origin. more like this
source definition of sand from SLTTs 2004 sandy sediment; particle sizes defined from Krumbein phi scale (W C Krumbein and L L Sloss, Stratigraphy and Sedimentation, 2nd edition, Freeman, San Francisco, 1963; Krumbein and Pettijohn, 1938, Manual of Sedimentary Petrography: New York, Appleton Century Co., Inc.) more like this
type
Resource
Concept
in scheme simplelithology
is primary topic of sand