lavas tend to be rough, jagged and with either a blocky or a rubbly/clinkery surface, both formed essentially by continuous breaking and reworking of the cooled outer surface of a lava flow ( Balance and Smith 1982).

What is another way of saying lava?

molten rockpumicetuffmagmaigneous rockmixturecolloidpastesuspension

Is lava smooth or rough?

Rough Lava: A`a A common rough surface lava flow is known as a`a, which in Polynesian means ‘to burn’. A`a is the name of both the lava type and the whole lava flow. The surface of a`a lava is made up of jagged, clinker, and rubbled material that is broken up as the lava travels further from the volcanic vent.