Big Igneous Rock Extending Into the Earth's Crust

This page is the CodyCross answer for the clue below from Street Fair, Group 1313, Puzzle 3 (Skills Workshops).

Question is: Big Igneous Rock Extending Into the Earth's Crust

and the answer is: BATHOLITH

Word Meaning:

BATHOLITH — (geology) A large irregular mass of intrusive igneous rock that has melted or forced itself into surrounding strata

Definitions from Wiktionary.