Show Summary Details

Quick Reference

A crater, often occupied by a shallow lake, which is produced by an explosive volcanic eruption. Normally it is surrounded by a low rampart or ring of ejected material. Typically, maars are formed by the explosive interaction of volcanic magma with groundwater. The ejected material is a mixture of country rock and highly fragmented ash.

Subjects: Ecology and Conservation — Earth Sciences and Geography.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.