Quartz Thin Section

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Quartz thin section. To link to this object paste this link in email im or document to embed this object paste this html in website. The extinction in waves is called undulose extinction and indicates dislocation walls in mineral grains. A photograph of a rock in thin section is often referred to as a photomicrograph.

Had the person who made the thin section ground the sample down any farther many of the feldspars would have been lost. This work is a part of petrology and helps to reveal the origin and evolution of the parent rock. Chromite is dark brown to opaque at full thin section thickness.

In thin section quartz grain provenance in a sedimentary rock can be estimated. This slide obligingly provided a 30µ thick quartz grain beside a thicker one so you can see the comparison. Quartz thin section view description.

Home rocks and minerals quartz thin section reference url share. Quartz thin section photomicrographs are taken in plane polarized light and cross polarized light and can easily be recognized under the microscope. The quartz in this biotite gneiss is a great example.

Cr mg al rich chromites are realtively transparent and can be dark brown at full thin section thickness. In crossed polarized light the quartz grain can go extinct all at once called monocrystalline quartz or in waves called polycrystalline quartz. Quartz in thin section.

Thin sections are prepared in order to investigate the optical properties of the minerals in the rock.