Question

Lava containing numerous gas cavities of irregular shape are called

Answer 1

vesicular textures..........

Answer 2

The correct answer for your question is Vesicular texture.

Vesicular texture is a form of volcanic texture which consists of numerous gas cavities of irregular shape called vesicles. This type of texture can be found more commonly in aphanitic rocks that surfaces on the earth through extrusion.

Lava get this type of texture when the magma rises to the surface of the earth and cools. Gases that escapes from the magma leaving some sort of bubbles or cavities behind in the magma.