mysqlClass Error 9 in file extras/autoload.inc.php, line 72:
Error #8192: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
amphibolite

amphibolite

SRI Petrography ID: 39

Granatfels (Madre Granata)

Dekorgestein und Baugesteinsammlung
Area of usage: Ancient Rome
NHM-Inv.-No.: F2291
SRI-No.: 203-39

Names

[de] Amphibolit
[en] amphibolite

Description

metamorphic, often foliated, sometimes banded, often coarse grained, dark green to black rock, consisting mainly from amphibole minerals (often hornblende) and plagioclase.
Amphibolite is a metamorphic rock, formed by regional metamorphosis either from sedimentary (para-amphibolites) or magmatic (ortho-amphibolites) protoliths.

Color

dark green to black

Grain Size

Medium to coarse grained

Texture

very variable: foliated, banded, or massive

Minerals

plagioclase and amphibole minerals (hornblende) without quartz (or just very low quartz contents)

Occurences

Canada, Germany (Erzgebirge, Fichtelgebirge, Schwarzwald), Austria (Böhmische Masse, Hohe Tauern), Turkey, Greece, Egypt

Comments

Rocks containing a feldspar groundmass and more than 90% of amphibole minerals are called lamprophyre.

Classification

Class

METAMORPHIC ROCKS

Broader Terms

igneous protolith

Narrower Terms

Czech Republic-amphibolite

Homonyms

amphibolite (sedimentary protolith)