3 Types Of Rocks
Published on Nov 30, 2015
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PRESENTATION OUTLINE
Intrusive igneous rocks - magma does not reach earths surface, it cools in large chambers, in cracks, or between layers in the surrounding rock. When magma pushes into or It intrudes, surrounding rock below earths surface and cools.
Photo by Al_HikesAZ
Extrusive igneous rocks - igneous rocks that form when lava erupts or extrudes on to earths surface.
Photo by Joe Dsilva
sedimentary rocks form from weathering, erosion, deposition, burial and cementation.
Photo by Smart Destinations
Clastic sedimentary rocks - form by accumulation of sediments.
Photo by Darkroom Daze
Chemical sedimentary rocks - form when mineral constituents in solution become supersaturated and inorganically precipitate.
Photo by awyu322
Organic sedimentary rocks - form when fossils become cemented together over time.
Photo by James St. John
Metamorphic rocks are formed when the minerals they contain are chemically changed or heated up.
Photo by Ochinko
FOLIATED rocks - form who pressure squeezes the flat or elongate surfaces of minerals so they become aligned.
Photo by James St. John
Non-foliated metamorphic rocks - formed around igneous intrusions where the temperatures are high but the pressure is low.
Photo by James St. John
