Which layer in the earth is similar in composition to basalt, a dark lava rock?

A) continental crust
B) oceanic crust
C) upper mantle
D) lower mantle
E) core

Basalt

A fine-grained, dark-colored mafic igneous rock, with or without vesicles and phenocrysts of pyroxene, olivine, or feldspar.

Dark Lava Rock

Often basalt, this is a type of volcanic rock that is rich in iron and magnesium, giving it a dark coloration.

Continental Crust

The thick part of the Earth's crust that forms the continents and continental shelves, consisting mainly of granitic rocks.