Chapter 13ON FINAL

Chapter 13ON FINAL - Chapter13ONFINAL 19:39 Continentsrift,...

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Chapter 13- ON FINAL 19:39 Continents rift, drift and collide- called plate tectonics Opening and closing of ocean basins- called Wilson cycle Sea level rises and falls- called transgression and regression Species arise, flourish and disappear forever- called extinction, speciation Methods for studying the past Orgogenic events- mountain building events Sea level- global warming Climates-different fossils and rocks Organisms- natural selection, speciation, extinctions Continental positions-plate tectonics, continental drift, divergent  convergent boundaries Plate boundaries- transform plate boundaries, divergent plate  boundaries, convergent plate boundaries Chemistry in relation to atmosphere and ocean- o Atmosphere- how has the atmosphere changed over time?—lack of  o2 in the beginning o Ocean- salty?? Depositional environments- rocks Erosion destroys rocks What is the rock type and where did it form
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Ancient orogens- former mountain belts Igneous activity, deformation, and metamorphism Thick sedimentary deposits filling foreland basins Ancient orogenic belts expose deeply buried rocks Continental growth Grow by addition along edges o Continental interiors are older o Rocks become younger toward margins Microplates- little pieces of crust that came together and formed north  America as we know it Paleomagnetism captures pealoaltitude Ocean width changes by reversing sea floor anomalies Rock and fossil distributions compare across oceans Magnetic stripes- relate to age Methods for studying the past Tropical Subtropical Polar
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Climatic belts expand and contract Greenhouse earth Snowball earth Phanerozoic Eon Phaneros= visible; zoic=life Recent 545 million years of earth history Trilobites o Paleozoic- ancient life o Mesozoic- middle life o Cenozoic- recent life Sea level changes over time-risen and fallen….has to do with glaciation Stratigraphic sequences or SLOS cycles When sea level is low there is no deposition when sea level is high there is  deposition Rifting of Pannotia left 4 large continental fragments Godwana- s america, Africa, antartica, india, australia Laurentia- n america and greenland Baltica- europe Siberia
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Chapter 13ON FINAL - Chapter13ONFINAL 19:39 Continentsrift,...

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