Geos 241 Historical Geology Test #2 Review Know the differences between the different types of unconformities What are time-stratigraphic units? What are the different types of fossilization processes? What are trace fossils? What are casts and molds? What are fossils? Explain transgressions and regressions Who are Wm. Smith, Cuvier, Sedgwick, Murchison, Hutton, Darwin, Lamark, Linnaeus? What are index fossils? What is the definition of paleontology, stratigraphy? What is a facies? What is Walther’s Law? What is superposition, correlation? What are formations, members, systems, stages, groups? What is the difference between relative and radiometric ages? What are the 3 major depositional environments and some minor environments and their characteristic lithofacies? Be sure you can identify different environments and the sedimentary deposits associated with them. What are varves? What is micrite? What are graded beds and turbidity currents? Be able to identify some sedimentary structures and their uses in interpreting sedimentary environments. What’s the difference between beds and laminae? What are mutations? What is a species? What is gradualism? What is punctuated equilibrium? What is parallel evolution, convergent evolution? What are homologous structures? What is speciation? What is taphonomy? Taxonomy? What is the Linnean classification? What is evolution? Explain natural selection Explain dominant vs. recessive characteristics What is DNA? What is mitosis? Meiosis?