
Material is made up of a heterogeneous mix of different rock types. Instead of being composed on one rock type, it is composed of fragments of many different rocks.
Found on
http://volcano.oregonstate.edu/glossary/1

Material is made up of a heterogeneous mix of different rock types. Instead of being composed on one rock type, it is composed of fragments of many different rocks.
Found on
http://www.encyclo.co.uk/local/21455
No exact match found.