Metamorphic Rocks Thin Section

Although commonly light yellow green in thin section it may be colorless.

Metamorphic rocks thin section. Over time this collection should become more orderly and comprehensive but don t hold your breath. Crystals in igneous rocks often rectangular laths. All images have two views in plane and cross polarized light.

This work is a part of petrology and helps to reveal the origin and evolution of the parent rock. Alex strekeisen i vetrini della mia fantasia. Also in high grade meta rocks.

It is formed by dynamic metamorphism at high temperatures and high pressures that aligns the grains of mica hornblende and other flat or elongated minerals. Rock forming minerals of metamorphic rocks in thin section a work in progress 1 olivine. Schist from the col de l iseran.

Carbonates in thin section unless stained. Rock with quartz garnet hornblende muscovite. Its interference colors commonly seem anomalously bright compared to pyroxenes possibly a result of the high dispersion of the 2v.

Some common rock types as seen under the microscope. These are photomicrographs very thin slices of rock seen in plane polarised light or between crossed polarisers when the colours seen are produced by interference of light. A mylonite is a foliated and usually lineated rock that shows evidence for strong ductile deformation and normally contains rounded porphyroclasts and lithic fragments of similar composition to minerals in the matrix.

The word mylonite derives from the greek μυλων a mill since the original opinion on these. A photograph of a rock in thin section is often referred to as a photomicrograph. Metamorphic rocks thin sections.