Marble Thin Section Minerals

Properties rock group metamorphic metamorphism type regional metamorphic rock class carbonate protolith limestone common minerals calcite dolomite micas marble in hand sample for some reason we have no images of just plain marble.

Marble thin section minerals.

Within the tables minerals are arranged by colour so as to help with identification. Geol209 intensive school day 2 lecture 2 properties of minerals in thin section follow une geoscience on facebook. Damage produced during thin section grinding causes speckles of light in the biotite where the crystal lattice has been deformed. Rock forming minerals of metamorphic rocks in thin section a work in progress 1 olivine.

Basalt in thin section in xpl with phenocrysts of plagioclase feldspar and pyroxene mostlikely opx. If a mineral commonly has a range of colours it will appear once for each colour. Biotite metaluminous granite showing a close up of one crystal. Castner marble from the franklin mountains in southwest texas castner marble featuring garnet porphyroblasts marble in thin section hellip.

The first is extremely fine with signs of dynamic recrystallization and the second exhibits texture and mgs similar to those of carrara marble. This means that biotite in standard thin sections rarely goes completely extinct. Microstructure and grain size measurements on thin sections of this marble identify two petrographic varieties.