Greenschist

3D ModelNoAI

Lithology: Greenschist with minerals arranged in individual foils and bands forming foliated structure: light green epidote, medium green chlorite and dark green actinolite. White albite and transparent quartz are also present.

Origin: Greenschists are formed by regional metamorphism of mafic igneous or feldspathic pelitic rocks under low P and T conditions (1-4 kbar, 300-450 °C). The diagnostic mineral assemblage consists of chlorite, actinolite and epidote (these give the characteristic green colour), with or without albite, quartz, and calcite. The presence of platy minerals (muscovite, serpentine) enables the formation of foliation. K-feldspar, talc, tremolite, diopside, brucite, garnet, pyrophyllite, graphite, calcite, dolomite, scapolite, and wollastonite may also be present. The actual paragenesis depends on the composition of the protolith.

Locality: Grossglockner, Austria

Dimensions:

Inventory No.: 14221

3D model: Marko Vrabec. Description: Mirijam Vrabec