What Do You Call The Land Formation That Serves As Outlet Of…
what do you call the land formation that serves as outlet of the heat under the ground in escaping to the earth surface
Answer:
Volcanic Landforms and Geothermal Activity
As you know, magma is molten rock found beneath the Earth’s surface. Sometimes, it appears at the surface of the Earth as lava after moving through a volcano. At other times, magma does not come to the surface, but stays underground. In both cases, the magma eventually solidifies and the resulting rocks and formations are igneous. The rocks that solidify beneath the ground are called intrusive or plutonic rocks, while those that solidify above the surface are called extrusive or volcanic rocks. Extrusive rocks are sometimes small rocks that you can hold in your hand. At other times, entire landforms are created when lava flows onto the surface. Intrusive rocks do not always remain hidden below the surface. They can appear on the surface when rocks that once covered them are eroded away, exposing the intrusive igneous rock. Hot springs and geysers are some more examples of surface features related to igneous rock.
Lesson Objectives
List and describe landforms created by lava.
Explain how magma creates different landforms.
Describe the processes that create hot springs and geysers.
Landforms from Lava
The most obvious landforms created by lava are volcanoes. Volcanoes, of course, are the places where lava comes to the surface. As already discussed, volcanoes come in many forms, most commonly as cinder cones, stratovolcanoes, and shield volcanoes. However, lava can create other notable landforms, as described below.
Lava Domes
When lava is fairly viscous, it is thick and flows slowly. Although it might not be so viscous that it causes an explosive eruption, it can create a large sort of round “blob” or a lava dome. Because it is so thick, it does not flow far from the vent from which it came. In fact, lava flows often make mounds right in the middle of craters at the top of volcanoes (Figure 8.27 and Figure 8.28).
Geothermal energy is heat that is generated within the Earth. (Geo means “earth,” and thermal means “heat” in Greek.) It is a renewable resource that can be harvested for human use.
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