No. In some cases (like the mid-atlantic ridge), lava can erupt through rifts instead of the summit of a volcano; in other cases, such as Mount St. Helens, the 'lava' can erupt explosively and destructively through the side of a conical volcano.
lava
vents
Magma or lava vents and gas vents. Also fumarole.
Magma or lava vents and gas vents. Also fumarole.
Yes. It probably did. Mostvolcanoes have vents. They let more lava escape.
No. Volcanoes have vents. Vents are holes though which ash, gas, and lava can erupt.
down the hill
runny lava
pahoehoe lava, aa lava
A vent on the side of a volcano is known as a satellite vent, this can be seen in both Kilauea as well as around Mt. Shasta. These vents are caused by the volcano often times having a plug of some kind at the summit, or for reasons we don't fully understand yet, there is another reason that it is easier for the magma to escape through a satellite vent versus the summit.
magma or lava dried after a volcanic eruption.
That would be the result of a submarine volcano. Pillow lava is a common type of lava that submarine volcanoes produce.