Title: LaBarge Rock
Content: injected by force upward into overlaying sedimentary "country rock" of white sandstone and shale. At the time of the intrusion both the hot molten rock and the recipient sedimentary rock were buried deep below the surface of the earth. As the molten liquid igneous rock (often referred to as "magma") was forced upward and outward into the sedimentary rock, it displaced and cracked the surrounding rock structures. After intrusion the molten liquid rock cooled and hardened. Where the molten rock liquid filled in horizontally between rock layers, it formed sills; when it filled in vertical cracks it formed dikes; where

Title: Potrillo volcanic field
Content: molten rock went into crustal cracks which sometimes exploded violently onto the earth's surface up and down the rift. Several thousand years ago, here in the Potrillo volcanic field, white-hot magma rose from under the surface up through structural fractures toward the surface to change all the landscape appearance. In some places molten rock intruded into depositional sand but it failed to erupt through the surface, so erosion took place to expose the igneous formations. In other places molten rock erupted explosively, producing clouds of solidified lava that later fell back to earth as ash, forming a cone around the

Title: Magma
Content: Magma Magma (from Ancient Greek μάγμα ("mágma") meaning "thick unguent") is the molten or semi-molten natural material from which all igneous rocks are derived. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. Besides molten rock, magma may also contain suspended crystals and gas bubbles. Magma is produced by melting of the mantle and/or the crust at various tectonic settings, including subduction zones, continental rift zones, mid-ocean ridges and hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to

Title: Sequoia National Park
Content: in the Sierra Nevada are composed of granitic rocks. These rocks, such as granite, diorite and monzonite, formed when molten rock cooled far beneath the surface of the earth. The molten rock was the result of a geologic process known as subduction. Powerful forces in the earth forced the landmass under the waters of the Pacific Ocean beneath and below an advancing North American Continent. Super-hot water driven from the subducting ocean floor migrated upward and melted rock as it proceeded. This process took place during the Cretaceous Period, 100 million years ago. Granitic rocks have a speckled salt-and-pepper appearance

Title: Rock (geology)
Content: kind of rock may thus be traced gradually merging into those of another. Hence the definitions adopted in rock names simply correspond to selected points in a continuously graduated series. Igneous rock (derived from the Latin word "igneus," meaning "of fire," from "ignis" meaning "fire)" is formed through the cooling and solidification of magma or lava. This magma may be derived from partial melts of pre-existing rocks in either a planet's mantle or crust. Typically, the melting of rocks is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in

Question: What is the name given to the molten rock beneath the surface of the Earth?
Answer: Magma