L323 - Sandstone, arenite

Hand Specimen

Pale yellow grey rock, almost entirely made up of medium sand quartz grains. These are sub-rounded, very well sorted, and are held together by a matrix of siliceous silt. Contains a significant amount of clay, but <15 vol%, so it is an arenite. 
No fizzing with acid, so does not contain significant carbonate. 
Weakly laminated.

Sub-round grains of quartz, some opaque grains and a few flakes of white mica. 
Siliceous, silty matrix.

This rock was deposited in a moderate energy, aqueous environment. The grains are not well rounded enough to be aeolian sediments.

sandstone
arenite