Petrology
The black rocks are "pelite", a metamorphosed fine-grained sedimentary rock, i.e. mudstone or siltstone
Petrology is a type of geology. It is concerned with rocks, how they form, and how they are used. It is between mineralogy, which is concerned with the minerals, in rocks, and geology, which tries to put rocks into a larger context.
Petrology Media
A thin section of a volcanic sand grain seen under the microscope, with plane-polarized light in the upper picture, and cross-polarized light in the lower picture. Scale box is 0.25 mm.
Ljudmila Dolar Mantuani (1906-1988), first female professor of petrography in Yugoslavia.
