hornblende

the rock formation contains a significant amount of hornblende.

geologists often study hornblende to understand volcanic activity.

hornblende is commonly found in metamorphic rocks.

the presence of hornblende indicates a high-pressure environment.

many minerals, including hornblende, contribute to the rock's color.

hornblende can be identified by its dark green to black color.

in petrology, hornblende is a key mineral for classification.

hornblende is often used in geological mapping.

the study of hornblende helps in understanding earth's crust.

samples of hornblende were collected for laboratory analysis.