Table of Contents
What is formed when a dome mountain is exposed?
A Dome mountain forms when uplifts pushes a batholith or smaller body of hardened magma towards the surface. The hardened magma forces the layer of rock to bend upward into a dome shape. Eventually the rock above the dome mountain wears away leaving it exposed.
When magma hardens in a volcanic pipe and the surrounding rock layer wear away this is called a?
Lesson 3
| Question | Answer |
|---|---|
| magma that forces itself across rock layers and hardens | dike |
| a landform produced when magma hardens in a volcano’s pipe and the surrounding rock later wears away | volcanic neck |
| hardened magma that squeezed between horizontal rock layers | sill |
| the hole left when a volcano collapses | caldera |
What features form as a result of magma hardens beneath Earth’s surface?
Landforms that are formed by magma are volcanic necks, dikes, sills, batholiths, and dome mountains. A volcanic neck is formed when the magma solidifies in the pipe. Dikes are formed when magma solidifies vertically across rock layers.
What do you call to the release of gases magma and rock from a volcano?
In explosive volcanic eruptions, the sudden release of gases from magma may cause rapid movements of the molten rock. When the magma encounters water, seawater, lake water or groundwater, it can be rapidly fragmented. The rapid expansion of gases is the driving mechanism of most explosive volcanic eruptions.
What gases are released during a volcanic eruption?
The most common volcanic gas is water vapor, followed by carbon dioxide and sulfur dioxide. Sulfur dioxide can cause breathing problems in both healthy people and people with asthma and other respiratory problems. Other volcanic gases include hydrogen chloride, carbon monoxide, and hydrogen fluoride.
When magma hardens between layers of rocks horizontal?
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.
When magma forces its way across multiple rock layers and hardens?
Geologic Time
| Question | Answer |
|---|---|
| Magma that forces its way into rocks and hardens is called… | Intrusion |
| A petrified fossil forms when… | Minerals replace all or part of an organism |
| The earliest forms of life appeared during the… | Precambrian Time |
| On the geologic time scale, eras are divided into… | Periods |