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Differentiate Between the Following

written 6.3 years ago by himanshuumeshjha • 80

modified 5.0 years ago by sanketshingote • 100

1. Volcanic Tuff and Volcanic Bomb

2. Central eruption and fissure type eruption

engineering geology

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written 6.3 years ago by himanshuumeshjha • 80

1. Volcanic Tuff and Volcanic Bomb

Sr.No.	Volcanic Tuff	Volcanic Bomb
1	Volcanic Tuff is a type of igneous rock,formed during an explosive volcanic eruption.	Volcanic bomb is a pyroclast which was semi-molten (viscous) while ejected from a volcanic vent and is therefore shaped while in flight.
2	Tuff consist of volcanic ash with fragments less than 64mm.	A mass of molten rock (tephra) larger than 64 mm (2.5 inches) in diameter.
3	They reach the ground in extremely hot nature and then cool down gradually and form a stiff rock like structure.	They cool into solid fragments before they reach the ground. Because volcanic bombs cool after they leave the volcano, they are extrusive igneous rocks.

2. Central eruption and fissure type eruption

Sr.No.	Central Eruption	Fissure Type Eruption
1	This type of eruption usually involves a single vent	A fissure type has a lot of openings or vent unlike central type.
2	The solid and molten rock materials ejected accumulate around.	Lava,Flowing out of fissures,spreads out over extensive areas forming Lava sheets
3	The vent forming a hill or a mountain is more or less conical in shape at the apex of these volcanic cones are funnel shaped depressions called craters	This type of eruption involves a series of winds present along a fault line in the earths crust discharging enormous quantity of lava leading to the formation of lava planes and plateaus usually hundreds of square kilometers' in area.

See Below Figure For Central And Fissure Type Volcanos

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