Which one of the following terms are related to volcanoes?
Choose the correct option from the codes given below:
Calderas are large volcanic craters that form by two different methods: 1) an explosive volcanic eruption; or, 2) collapse of surface rock into an empty magma chamber. Pumice is a is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. It is typically light coloured.
This question is a part of GKToday's Integrated IAS General Studies Module