written 5.7 years ago by
himanshuumeshjha
• 80
|
modified 4.5 years ago
by
sanketshingote
• 100
|
1. Volcanic Tuff and Volcanic Bomb
2. Central eruption and fissure type eruption
|
written 5.7 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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