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A type of igneous rock. Basalt is the most usual rock kind in the earth"s crust and also makes up many of the ocean floor. Compacting and CementingA procedure that transforms sediment into sedimentary rock. End time, sediment accumulation in oceans, lakes, and valleys, eventually structure up in layers and also weighing down the material underneath. This weight presses the sediment corpuscle together, compacting them. Water passing through the spaces in in between the particles help to cement them together also more.ConglomerateA form of sedimentary rock consisted of of pebbles, stones, and also smaller corpuscle pressed together by the activity of tide or water. Conglomerate is often discovered in huge expanses or beds. Detect a bed that conglomerate is a good clue that a river or beach once existed in the location.CoolingThe procedure that hardens magma and turns it right into igneous rock. The cooling the magma can occur either under or on the earth"s surface.ErosionThe procedure by i beg your pardon soil, sediment, and tiny pieces of absent are lugged away native their original locations and also transferred somewhere else by the actions of wind, water, ice, or living organisms.FossilsImprints the leaves, shells, insects, or other items left in rock.GneissA type of metamorphic rock that usually has ribbonlike layers. Gneiss (pronounced "nice") can regularly be watched on mountainsides, whereby rocks formed below the surface have actually been pushed up by activities in the earth"s crust.Heat and also PressureThe process that occurs under the earth"s surface and also turns any type of kind the rock right into metamorphic rock.Igneous RockOne of the three main rock types, created from the cooling and hardening that magma. Periodically the magma cools deep within the earth, and also other times it erupts ~ above the earth"s surface from volcanoes (in this case, that is referred to as lava).LimestoneA type of sedimentary absent often uncovered near oceans and also lakes.MagmaHot, molten rock found deep within the earth.MagmaMolten rock that flows in ~ the earth"s surface and is comprised of gases, liquids, and crystals. As soon as magma get the surface, the is dubbed lava.MarbleA type of metamorphic rock developed when limestone is driven down right into the earth and also subjected to extreme heat and also pressure because that a long period of time.MeltingThe process that turns any type of rock right into magma. Melting a rock requires exceptionally high temperatures, which just occur much beneath the earth"s surface.Metamorphic RockOne that the three main rock types, formed deep within the earth, wherein rock product is subjected to intense heat and pressure (squeezing). The rocks that an outcome from this processes often have ribbonlike layers and also may have shiny crystals on your surface, created by minerals growing slowly end time.MetamorphosisFrom the Greek "to transform," metamorphosis is the adjust that occurs once rocks under the earth"s surface are subjected to extreme heat and pressure, transforming them right into metamorphic rocks.ObsidianA form of extrusive igneous rock, produced from lava that cools so quickly that no crystals can form on the surface. It can be uncovered near volcanic lava flows.The absent CycleThe recurring series of events that rocks undergo, end time, the transforms them native one form to another.SedimentLoose pieces of minerals and rocks.Sedimentary RockOne of the three main rock types, created from corpuscle of sand, shells, pebbles, and also other fragments of material. Together, every these particles are called sediment. Gradually, the sediment accumulation in layers and over a long period of time hardens into rock. Generally, sedimentary rock is relatively soft and also may break apart or crumble easily. Girlfriend can often see sand, pebbles, or stones in the rock, and also it is usually the only type that consists of fossils.VolcanoAn opening in the earth"s surface that permits hot magma, ash, and also gases come escape from deep listed below the surface.

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Once magma get the surface through a volcano, it is referred to as lava. Once lava cools, it forms extrusive igneous rock.Weathering
The process by i m sorry rocks room worn under by wind and water, creating sediment.TrenchA deep sink that develops at the sheet of a continent when an oceanic plate sinks underneath a continent plate.