1. The proposed model is calibrated for the ferromagnesian monoclinic Amphiboles, under the assumptions

2. The granular disintegration of the rock is mainly induced by the alteration of ferromagnesian minerals.

3. The breccias at Whitefish Falls are enriched in ferromagnesian minerals compared to adjacent, embayed and partially digested, host rock.

4. Slightly foliated, Amphibolites generally form during the regional metamorphism of igneous rocks primarily composed of ferromagnesian minerals, though other types of the rocks are also known to occur.

5. • Amphibole l is the name of an important group of generally dark-colored • An important rockforming mineral group of ferromagnesian silicates • Group of generally dark-colored rock-forming inosilicate minerals • Hornblende Amphibole Credit: USGS Any of a large group of rock-forming