GPHY 207 Quiz: Quiz 3
Document Summary
Wallace line: dividing line between oriental and australian realms! Nearctic vs. neotropical line (more uid than wallace line)! Igneous rocks: formed by cooling and solidi cation of magma ex. granite and basalt! Common spatial framework: intrusive= formed underground, extrusive= formed when cooling occurs at the surface, lithi cation: physical and chemical processes that allow this to occur ex. sandstone, ex. marble is formed when limestone exposed to extreme conditions! Sedimentary rocks: weathered material accumulates and eventually compacted into rock! Metamorphic rocks: igneous or sedimentary are altered at high temperatures and pressures! Law of superposition: strata that is lower in stratigraphic exposure is older than above strata! Law of uniformitarianism: processes/ rates of erosion and deposition are the same as today! Theory of continental drift: movement of the continents: crust of the continents composed of light rocks, permian glacial deposits indicated that tropical areas were once glaciated, similarities in shape, geology and fossil suggest historic close proximity!
