What is the proportion of medium sandstone
The main component of A. quartz composition of more than 52%; B. clay around 15%; C. goethite about 18%; D. other substances more than 10%. The chemical composition of sandstone varies greatly, which depends on the composition of clastic and interstitial materials. SiO2 and Al2O3 are the main chemical compositions of sandstones, and the SiO2/Al2O3 ratio is a sign of maturity and immature sandstones.
According to the diameter of the sand is divided into: giant sandstone (2 ~ 1mm), coarse sandstone (~ 0.5mm), medium grained sandstone (~ 0.25mm), fine sandstone (0.25 ~ 0.125mm), particulate sandstone (~ ~ 0.0625mm). Medium grained sandstone.
Sandstone is composed of quartz particles (sand), stable structure, usually light brown or red, mainly containing silicon, calcium, clay and iron oxide. Sandstone is a sedimentary rock, mainly formed by cementation of sand, the sand content should be greater than 50%. Most of the sandstone is composed of quartz or feldspar.
