What is rough chunky lava called?

What is rough chunky lava called?

Pahoehoe lava flows are fed almost… In volcano: Lava flows. … world by their Hawaiian names: pahoehoe, a more fluid flow with a smooth to ropy surface; and aa (or a’a), a more viscous flow whose surface is covered by thick, jumbled piles of loose, sharp blocks.

What type of lava rock is cooler and slower moving?

Pahoehoe
The A’a / Pahoehoe difference: If lava cools slowly and does not move too fast it forms smooth ropy lava called pahoehoe. However, if it cools quickly and moves fast it can tear into clinkery pieces called a’a.

What do you call a cooled lava?

Lava rock, also known as igneous rock, is formed when volcanic lava or magma cools and solidifies. It is one of the three main rock types found on Earth, along with metamorphic and sedimentary.

What type of lava is rough?

Aa lava is a rough rubbly crust of a lava flow. It is a major lava flow type. Other important subaerial lava flow types are pahoehoe and blocky lava. Aa and pahoehoe are terms that were brought to geological terminology from the Hawaiian language.

Why is lava slow?

Lava flows are streams of molten rock that originate from a volcanic vent. The speed that this molten material moves away from the vent is dependent on: The composition of the molten rock. Other eruptions only small amounts of lava are released, and so the flows are slower.

Why is some lava slow?

Basaltic lava flows move much faster than rhyolitic lava flows. Also, the amount of gas dissolved in the lava can change the flows ability to flow (viscosity). The rate of material that the vent is spewing out. Other eruptions only small amounts of lava are released, and so the flows are slower.

What are the types of basaltic lava?

Lavas, particularly basaltic ones, come in two primary types: pahoehoe (pronounced ‘paw-hoey-hoey”) and aa (pronounced “ah-ah”). Both names, like a number of volcanological terms, are of Hawaiian origin.