Limestone, siltstone and hornfelsed how to distinguish between
Drops of hydrochloric acid, reaction is the largest limestone, calcareous siltstone if carbonation, will send a bit, hornfelsed basically angular, very good distinction.
The clastic structure is composed of particles, mud crystal matrix and bright crystal cement. Also known as debris particles, mainly in clastic, bioclastic and oolitic, micritic matrix is composed of calcium carbonate fines or crystal particle mortar, mostly less than 0.05 mm, microspar cements are chemical precipitates filling in porous rock particles in between, is larger in diameter than the calcite crystal particles of 0.01 mm the grain structure is; crystal particles by chemical and biological chemical deposition of. Siltstone [English]:siltstone is mainly composed of silty sand clastic sedimentary rock is siltstone [1]. The silt content of 0.0625 ~ 0.0039 mm (mm) is a kind of clastic sedimentary rock, which is composed of siltstone samples of particle size of. The detrital components of siltstone are generally simple, mainly quartz, feldspar and lithic are rare, and sometimes contain more muscovite. Other than sand, composed of sand, clay, or chemical precipitate. According to the size of coarse sandstone (0.0625 ~ 0.0312mm) and fine siltstone (from 0.0312 to 0.0039mm).
Limestone (Limestone), commonly known as limestone, calcite as the main component of carbonate rocks. Limestone is a sedimentary rock. Sometimes contain dolomite, clay mineral and detrital minerals, gray, gray, gray and black, yellow, red, brown red color, hardness is generally small, and the violent reaction of dilute hydrochloric acid. The structure is complex, there are two kinds of clastic structure and grain structure.
