Volcanic Rock
Of igneous rock.
Extrusive igneous rock solidified near or on the surface of the Earth.
This concept's ID is @1~75582
Contains
- volcanic glass
A kind of natural glass produced when molten lava cools very rapidly.
- lava
Rock that in its molten form (as magma) issues from volcanos; lava is what magma is called...
- basalt
The commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is...
- dacite
A grey volcanic rock containing plagioclase and quartz and other crystalline minerals.
- agglomerate
Volcanic rock consisting of large fragments fused together.
- amygdaloid
Volcanic rock in which rounded cavities formed by expanding gas have subsequently become...
- tuff
Hard volcanic rock composed of compacted volcanic ash.