Limestone Thin Section Description

Exposures were for around 1 132 sec with an f stop of 2 6 and pixel dimensions of 2048x1536.

Limestone thin section description. Thin sections microphotographs taken with a nikon 995 digital camera mounted on a nikon eclipse e600 microscope equipped with crossed polarizers and an intermediate tube containing an insertable retardation plate microscope. The twin lamellae are mostly parallel to the long diagonal but they also intersect at oblique angles depending upon how the section is cut. This project is given broader attention elsewhere in this website.

Calcite 1 thin section hfov 2mm xpl. 2mm in diameter and in thin section oolites show often concentric structures. In optical mineralogy and petrography a thin section or petrographic thin section is a laboratory preparation of a rock mineral soil pottery bones or even metal sample for use with a polarizing petrographic microscope electron microscope and electron microprobe.

01 12 as twin plane is very common especially in the calcite of metamorphic limestone. Calcite 2 thin section hfov 2mm get 360 live interaction. Rock thin section preparation for limestone limestone is a sedimentary rock composed largely of the minerals calcite and aragonite which are different crystal forms of calcium carbonate caco3.

Thin section photomicrograph of a carbonate mudstone in plane polarised light. The dunham classification system for carbonate sedimentary rocks was originally devised by robert j. Scan your thin section you can do so either using a commercial slide scanner or a cheap film scanner.

Dunham in 1962 1 and subsequently modified by embry and klovan in 1971 2 to include coarse grained limestones and sediments that had been organically bound at the time of deposition. Marble from franchimont quarry belgium. Commercial scanners start at around 2000 and go up to 10 000 or so.

Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera. A large volume of any limestone is usually composed of carbonate mud or micrite because of the small size of the grains or crystals in the micrite identification of their origin is difficult to impossible the grain size boundaformry between sand and mud that is used by geologists for carbonates varies. A thin section it is called and it is a standard means for studying the composition of stone.