'The ocean crust sits or floats on the Earth's mantle & is composed mainly of this igneous rock'
basalt
OCEAN NOTIONS: The ocean crust sits or floats on the Earths mantle & is composed mainly of this igneous rock
The ocean crust sits or floats on the Earth's mantle & is composed mainly of this igneous rock
The ocean crust sits or floats on the Earth's mantle & is composed mainly of this igneous rock
OCEAN NOTIONS
basalt
OCEAN NOTIONS