6Processes that form Sedimentary Rock Weathering: the breaking down of the Earth’s material by natural processes (Water, Wind, Ice, Chemicals, etc.) into smaller pieces or sedimentsErosion: weathered rock and soil particles are moved from place to placeDeposition: weathered sediments are laid down in a new location creating new landforms or rocksCompaction: heavy sediments press down on the layers beneathCementation: dissolved minerals flow between the sediments and cement them togetherProcesses that form Sedimentary Rock
7Processes that form Igneous & Metamorphic Rock Melting: caused by heat and pressure around the rock to form magmaSolidification: magma cools and hardensRecrystallization: while cooling, rock can develop crystals, depending on conditionsProcesses that form Igneous & Metamorphic Rock
9Complete the following: Turn in your Rock Cycle Directed Reading & Earthquake/Volcano Test CorrectionsGet the 2 Directed Readings from the tableHave something to write withClear off your table
10Complete the following: Turn in your Rock Cycle Directed Reading, Comic Strip & Earthquake/Volcano Test CorrectionsGet the Igneous Rock Directed Reading from the tableGet out your Minerals & Rocks NotesHave something to write withClear off your table
11Igneous Igneous is Latin for “born of fire” Formed from cooling magma or lava
12Forms when magma cools and solidifies Some reaches the surface of earth before cooling, other cools under the surface
13Intrusive Extrusive Form below ground from magma (Example: Granite)Form below ground from magmaUsually has coarse crystals (grains) from cooling slowlySome have large and small crystalsForm above ground from lavaUsually have small or no crystals from cooling quicklyExtrusive(Examples: Pumice & Obsidian)
14Into the Bedrock On top (Exit) intrusive extrusive (crystals) (no crystals)
22One way Sedimentary Rock can be formed Deposit & Compress the SedimentsOne way Sedimentary Rockcan be formedThat ROCKchanged again!
23Sedimentary RockFormed from sediments (rock fragments, mineral grains, animal and plant remains) that are pressed or cemented together or when sediments precipitates out of a solution.Sediments are moved by wind, water, ice, or gravity.
24The heavy sediments press down on the layers beneath (Compaction) Water or wind breaks down (Weathering), moves (Erosion), and deposits sediment (Deposition)The heavy sediments press down on the layers beneath (Compaction)Dissolved minerals flow between the sediments and cement them together (Cementation)
25Sedimentary Rocks & Fossils Deposited sedimentary rocks form horizontal layers called STRATA.Process of arranging sedimentary rocks into layers is STRATIFICATIONScientist know that the layers and fossils on top are YOUNGER than the fossils in lower layers Law of Superposition
26Types of Sedimentary Rocks Clastic: made of broken pieces of other rocks.Organic: remains of once living plants and animals are deposited in thick layers called fossilsChemical: minerals dissolved in lakes, seas, or underground waterLimestone made when calcite precipitates from sea waterRock salt made from evaporation of sea watersTypes of Sedimentary Rocks
30Metamorphic Rocks Rocks changed due to intense heat and high pressure “Meta-” means “changed” and “-morphosis” means “shape” in GreekIgneous, Sedimentary and other Metamorphic rocks can change to become Metamorphic rocks
31How Metamorphic Rocks Change Pressure from overlying rock layersHigh heat, but not enough to melt the rockRocks may be flattened or bent or atoms may be exchanged to form new materials.Think of metamorphic rocks as a squished peanut butter and jelly sandwich in your lunch.How Metamorphic Rocks Changem
32Types of Metamorphic Rock Foliated Has visible parallel layers or bands you can seeExample: Gneiss formed from rearrangement of minerals in Granite into bandsNot layered & no bands are formedExample: Marble formed from LimestoneNon-Foliated