Question

1. which igneous rock has a vesicular texture and a felsic composition? a. pumice b. basalt c. granite d. scoria

Explanation:

• Pumice: It is a felsic igneous rock with a vesicular texture. It forms when highly - gas - rich, silica - rich magma erupts and the gas bubbles are trapped as the magma solidifies rapidly.
• Basalt: It is a mafic (not felsic) igneous rock. It has a fine - grained texture (usually aphanitic) when it cools quickly on the surface.
• Granite: It is a felsic igneous rock but has a phaneritic (coarse - grained) texture as it cools slowly beneath the Earth's surface.
• Scoria: It is a mafic (not felsic) igneous rock with a vesicular texture.

Answer:

A. pumice