Surface Features
There are two types of vent landforms from the explosive interaction of magma and ground or surface water; tuff cones and tuff rings. Both of the landforms are associated with monogenetic volcanoes and polygenetic volcanoes. In the case of polygenetic volcanoes they are often interbedded with lavas, ignimbrites and ash- and lapilli-fall deposits.
Read more about this topic: Phreatomagmatic Eruption
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