Volcanic eruptions
Describe payrolistic material and lava flows
What is pyroclastic material?
Violent eruption
Volcanic ash& dust
Volcanic ash consists of powder-size to sand-size particles of igneous rock material that have been blown into the air by an erupting volcano (see image at right). The term is used for the material while it is in the air, after it falls to the ground and sometimes after it has been lithified into rock. The terms "volcanic dust" and "volcanic ash" are both used for the same material, however "volcanic dust" is more appropriately used for powder-size material.
Lapelli
Large pyroclastic particles that are less than 26 mm in diameter,called lapilli
Volcanic bombs
Volcanic blocks are giant blocks that explode out of a volcano
Quiet Eruptions
Quiet eruptions
Pahoehoe
Is the least viscouse type of mafic lava.it forms wrinkly volcanic rock when it cools.
Aa
Aa lava is more viscouse than pahoehoe lava and forms sharp volcanic rock when it cools.
Blocky lava
Blocky lava is most viscous type of mafic lava and forms chunky volcanic rock when it cools.