andesiiteista
Andesite is a volcanic rock of intermediate composition, typically gray to dark gray in color. It is named after the Andes Mountains, where it is found in abundance. Andesite is characterized by its fine-grained texture, though phenocrysts (larger crystals) of plagioclase feldspar, hornblende, and pyroxene may be present. Its mineral composition places it between basalt and rhyolite in the spectrum of volcanic rocks.
The formation of andesite is associated with subduction zones, where one tectonic plate slides beneath another.
Andesite is a significant rock type in geological studies, providing insights into magmatic processes and tectonic