Solidified Volcanic Ash
Ash
tephra and ash bombs
Solidified volcanic ash is called tephra or volcanic rock.
Solidified lava, sulphur, volcanic ash.
Tephra is basically ash, rock, cinders, and solidified lava spurted from a volcano.
Igneous rock is a rock that has solidified from previously melted material.The word from ignis meaning fire in the original Greek.Subdivided into Plutonic, which have solidified underground, and Volcanic which erupt as liquid (and ash) from the earth's surface.
When a volcano erupts, it sends out bits of rock, lava (solidified magma) and ash into the air. Then, gravity pulls the debris towards the ground so the debris drop, or fall, from the air.
A layer of ash and lava is a geologic feature formed by the deposition of volcanic ash and solidified lava during volcanic eruptions. These layers can build up over time to create thick sequences of volcanic material, which can be preserved in the rock record as distinct stratigraphic units.
Volcanic ash is considered extrusive igneous rock because it forms from volcanic eruptions where magma is rapidly cooled and solidified on the Earth's surface. The fine particles of ash are ejected from the volcano and settle on the ground, eventually compacting to form a rock-like material.
Solidified is spelled: S-O-L-I-D-I-F-I-E-D.
1. Cinders (clumps of ash as large from 2 - 64mm.)2. Bombs (blocks of lava that flies through the air along with the ash, these usually fall within 3km[2mm] of a volcano's vents)