Sentences with phrase «igneous rock composed»
Ironically for our green friends, the ore comes from a type of rock called «carbonatite» which is a relatively rare and unusual type of igneous rock composed primarily of carbonate minerals.
https://wattsupwiththat.com/ Not exact matches
The western 2/3 of Santa Catalina contains primarily metamorphic rocks, while the eastern end is composed of igneous rocks.
They found that the diatom - rich sediments, deposited during the warm intervals, were predominantly composed of material from one terrane - the Jurassic to Cretaceous volcanic rocks and associated sedimentary rocks of the Ferrar Large Igneous Province (FLIP).