PPT-Earth History GEOL 2110

Lecture 9 Absolute Dating of the Earth Major Concepts The discovery of radioactivity in the early 1900s and the recognition that radioactive deca y a statistical event occurs at a constant average rate for particular unstable isotopes has provided a means of determining the absolute ages of earth materials. *Correspondingauthor.E-mailaddresses:fcorsett@usc.edu(F.A.Corsetti),kaufman@geol.umd.edu(A.J.Kaufman).Earth-ScienceReviews73(2005)63 Lab . 5. . - . Rocks, Weathering, and Minerals. Oct. 2 . - . 5, . 2012. Department of Earth Sciences. Department of Earth Sciences. REVIEW . | . 2. QUIZ . 3 . REVIEW. Solid Bedrock. Unconsolidated sediments. Lab . 6 . - . Landslides and Mass Wasting. Oct. . 9. . - . 12. , . 2012. Department of Earth Sciences. Department of Earth Sciences. REVIEW . | . 2. QUIZ . 4 . REVIEW. Mauna . Loa. Mauna . Kea. What . The Earth is divided into three layers based on the compounds that makeup each layer. They are:. 1. Crust. 2. Mantle. 3. Core. The Crust. The Crust is the :. 1. outer most layer of the Earth.. 2. It is the thinnest layer.. What is Earth Science?. What are the Earth System’s four Spheres?. What are cycles and how do they work?. System. : A kind of model often used to describe the natural world.. Closed System. : ENERGY enters and may leave, but MATTER does not leave. 2. TODAYS . MATERIAL:. Introduction to the Course. The Quaternary . Period. Climatic . and Geologic Processes. Instructor:. Jason Robert Patton . Email: . Jason.Patton@humboldt.edu. . Office:. Founders Hall 22 . The Sun. What physical features do you notice?. How does the Sun compare to the Earth and Moon?. What does the Sun provide for the Earth?. Physical Characteristics of the Sun. Sunspots. Solar Flare. The Paleozoic Era. Part 4b: . Stratigraphy. and Tectonics of Silurian and Devonian . Periods. Major Concepts. The proliferation of coral reefs caused restricted basins wherein great thickness of limestone and . The Pleistocene Epoch. The Dawn of Humans and the Effects of Climate on Civilizations. Major Concepts. Climatic changes produced distinctive flora and fauna that was adapted to cold weather. Among flora were the expansion of grasslands, tundra, boreal spruce forests, and hardwood forests. The Mesozoic Era. Geologic and Tectonic History of the . North American Cordilleran. Major Concepts. The geologic history of Cordilleran . Orogen. of North America during the Mesozoic Era was dominated . Lecture 7. Fundamentals of . Stratigraphy. . I. Geologic Time Scale, . Stratigraphic. Units, Sedimentary . Facies. Major Concepts. In the early 1800’s, the geologic rock record and time scale was deciphered from careful mapping and observations of fossil assemblages throughout Europe. Conditions on early Earth made the Origin of Life possible.. Current theory about how life on Earth began.. Earth formed about 4.6 billion years ago.. Earth was too hot and still being bombarded by meteors, any water evaporated.. Eras of Earth’s History EQ: What causes changes in the Earth? How does knowing the past give us a VISION for the future? Precambrian Time Eon Precambrian Time Eon 4.6 billion years ago-545 million years ago COMMON plumeswere initially thought to consist of primitive mantle (e.g., Schilling, 1973). As we found, mixing be-tween primitive and depleted mantle can explain the Sr and Nd isotopic compositions