Question

________ is a dark, fine- grained extrusive rock. Examples of this rock type are the rocks that make up the bulk of the oceanic crust and is exhibited in a flow on the west side of Albuquerque, New Mexico.

Answer 1

Basalt

Step-by-step explanation:

• Basalt is mafic fine-grained extrusive igneous rocks that are formed form rapid cooling of the magnesium and the iron-rich lava, more than 90% of the rocks makes the bulk of the oceanic crust and are also seen on the new Mexico western side.

• It has lower viscosity due to the low silica content and has a rapid flow that can spread over larger areas on cooling. Its usually dark grey to black in color, and weathers to brown and red due to the oxidization process.