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You are watching: Weathered sediments are pressed and cemented to form

Glossary
Basalt
A kind 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 also CementingA procedure that turns sediment into sedimentary rock. Over time, sediment accumulation in oceans, lakes, and valleys, eventually structure up in layers and also weighing under the product underneath. This load presses the sediment particles together, compacting them. Water passing v the spaces in between the particles help to cement castle together also more.ConglomerateA form of sedimentary rock made up of pebbles, stones, and smaller corpuscle pressed together by the action of tide or water. Conglomerate is often discovered in large expanses or beds. Recognize a bed that conglomerate is a good clue that a river or beach as soon as existed in that location.CoolingThe process that hardens magma and turns it right into igneous rock. The cooling of magma can occur either under or top top the earth"s surface.ErosionThe procedure by i beg your pardon soil, sediment, and small pieces of absent are lugged away indigenous their original locations and also transferred in other places by the plot of wind, water, ice, or life organisms.FossilsImprints the leaves, shells, insects, or various other items left in rock.GneissA kind of metamorphic rock the usually has ribbonlike layers. Gneiss (pronounced "nice") can regularly be seen on mountainsides, whereby rocks formed listed below the surface have been driven up by activities in the earth"s crust.Heat and PressureThe process that occurs under the earth"s surface and turns any kind of kind that rock into metamorphic rock.Igneous RockOne that the three key rock types, created from the cooling and also hardening the magma. Periodically the magma cools deep in ~ the earth, and also other times it erupts ~ above the earth"s surface from volcanoes (in this case, that is called lava).LimestoneA form of sedimentary absent often found near oceans and lakes.MagmaHot, molten rock uncovered deep within the earth.MagmaMolten rock the flows beneath the earth"s surface and is consisted of of gases, liquids, and also crystals. As soon as magma get the surface, it is dubbed lava.MarbleA form of metamorphic rock formed when limestone is propelled down right into the earth and also subjected to intense heat and also pressure because that a long duration of time.MeltingThe procedure that turns any type of rock into magma. Melting a rock requires very high temperatures, which only occur much beneath the earth"s surface.Metamorphic RockOne of the three key rock types, formed deep within the earth, wherein rock material is subjected to intense heat and pressure (squeezing). The rocks that result from this processes regularly have ribbonlike layers and also may have actually shiny crystals on your surface, formed by minerals growing slowly end time.MetamorphosisFrom the Greek "to transform," metamorphosis is the change that occurs when rocks under the earth"s surface space subjected to extreme heat and pressure, turning them right into metamorphic rocks.ObsidianA form of extrusive igneous rock, developed from lava that cools so easily that no crystals can kind on that surface. It deserve to be discovered near volcanic lava flows.The rock CycleThe recurring collection of events that rocks undergo, end time, the transforms them native one type to another.SedimentLoose pieces of minerals and also rocks.Sedimentary RockOne the the three key rock types, formed from particles of sand, shells, pebbles, and other pieces of material. Together, all these particles are called sediment. Gradually, the sediment accumulates in layers and over a long period of time hardens into rock. Generally, sedimentary rock is reasonably soft and also may break apart or crumble easily. You can often see sand, pebbles, or stones in the rock, and also it is typically the only form that contains fossils.VolcanoAn opening in the earth"s surface that permits hot magma, ash, and also gases come escape indigenous deep listed below the surface.

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When magma get the surface through a volcano, the is dubbed lava. As soon as lava cools, it forms extrusive igneous rock.Weathering
The procedure by i m sorry rocks space worn down by wind and also water, creating sediment.TrenchA deep valley that forms at the leaf of a continent when an oceanic plate sink underneath a continental plate.