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8th- Sedimentary Roc

TermDefinition
sedimentary rocks rocks that form from other rocks or pieces of once living things
sediment small pieces of rock or once living things that make up sedimentary rocks
lithification the overall process that converts sediments into a sedimentary rock
weathering the chemical or physical process in which rocks are worn down by the action of water, wind, gravity, and organisms
mechanical weathering process that breaks a rock into smaller pieces without changing their chemical composition
chemical weathering process that breaks apart rock when the minerals change into a difference substance (chemical change)
oxidation chemical action of oxygen causes rocks to rust
decaying plants and animals weak acid is released when organisms die that break down rock
erosion the process of transporting rock and organic material by moving it with natural agents such as water, wind, ice, and gravity
deposition sediments are deposited, or dropped off, somewhere else
Law of Superposition states that in an undisturbed sequence of rocks, the oldest rock layers are on the bottom and the youngest are on the top; each layer is younger than the one beneath it and older than the one above it
compaction layers of sediment are compacted, or pressed together
cementation minerals in water crystallize around a compacted rock to form a mineral glue that holds rocks together; mineral glue gives a rock its color
clastic sedimentary rocks made from pieces of other rocks
organic sedimentary rocks made from the remains of plants and animals
chemical sedimentary rocks that form when minerals precipitate (come out of a solution) or are left behind during evaporation
stratification visible bands that develop on a sedimentary rock from layers behind deposited one on top of another
stratified a rock that displays stratification
unstratified a rock that does not display stratification
Created by: holtzmanscience
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