Table of Contents
Which term is referred to the lava that forms creases and loops when it hardens?
Lava that forms smooth, ropelike coils when it hardens is called… Pahoehoe.
Which type of volcano erupts violently with more viscous lava and ashes which eventually form a mountain?
Composite Volcanoes Mt. Fuji, the highest mountain in Japan, is a dormant composite volcano. The viscous lava cannot travel far down the sides of the volcano before it solidifies, which creates the steep slopes of a composite volcano. Viscosity also causes some eruptions to explode as ash and small rocks.
What was formed by quiet lava?
A quiet eruption of low-viscosity lava produces a wide, flat volcano called a shield volcano. If an eruption is entirely ash and cinders, the result will be a small, steep-sided volcano called a cinder cone.
When magma hardens in a volcano’s pipe?
A volcanic neck forms when magma hardens in the pipe of a volcano. Softer rock around the pipe wears away, leaving just the neck standing. A volcanic neck looks like a giant tooth stuck in the ground. A dike forms when magma hardens across rock layers.
When magma squeezes between horizontal layers of rock and hardens?
sill
Magma that squeezes between horizontal rock layers hardens to form a sill. A dome mountain forms when uplift pushes a large body of hardened magma toward the surface, which eventually becomes exposed. A batholith is a mass of rock formed when a large body of magma cools inside the crust.
What forms when magma cuts across rock layers and hardens?
dike
Magma that forces itself across rock layers hardens into a dike. Magma that squeezes between horizontal rock layers hardens to form a sill. A dome mountain forms when uplift pushes a large body of hardened magma toward the surface, which eventually becomes exposed.
How are volcanoes formed in the mantle of the Earth?
The molten mixture of rock forming substances, gases, and water deep in the Earth’s mantle is called A belt of volcanoes around the rim of the Pacific Ocean. This happens when an explosive eruption hurls as, cinder, bombs, and gases out of a volcano. A weak spot in the crust where magma comes through.
Where does the magma come from in a volcano?
A weak spot in the crust where magma comes through. Hot water and steam that erupts from the ground. When the top of a volcanic mountian collapses this forms.
What happens when a volcano erupts in the Pacific?
The molten mixture of rock forming substances, gases, and water deep in the Earth’s mantle is called A belt of volcanoes around the rim of the Pacific Ocean. This happens when an explosive eruption hurls as, cinder, bombs, and gases out of a volcano.