Amphibolitovy

Amphibolitovy is a term that primarily refers to rocks of the amphibolite facies, a set of metamorphic conditions characterized by the presence of amphibole minerals. These rocks typically form under intermediate to high pressures and temperatures, generally ranging from 500 to 800 degrees Celsius and pressures from 5 to 10 kilobars. Amphibolitovy rocks are common in the roots of mountain belts and in ancient shield areas, indicating past tectonic activity and deep burial.

The mineral assemblage in amphibolitovy rocks is dominated by amphiboles, such as hornblende, and plagioclase feldspar. Other common minerals can include garnet, epidote, biotite, and quartz, depending on the original composition of the parent rock and the specific metamorphic conditions. The parent rocks for amphibolitovy can be diverse, including mafic igneous rocks like basalts and gabbros, as well as sedimentary rocks like impure sandstones and shales.

The texture of amphibolitovy rocks is typically granoblastic or lepidoblastic, reflecting the recrystallization of minerals under metamorphic stress. The color can vary widely, from dark green and black to grayish or even reddish, depending on the specific mineral content. Amphibolitovy rocks are important for understanding the thermal and pressure regimes of the Earth's crust during mountain building events and have been extensively studied in geology for their insights into plate tectonics and metamorphic processes.