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. 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 . Lab . 2 . - . Locating Earthquakes . Sept. . 9 . - . 14, . 2012. Department of Earth Sciences. Department of Earth Sciences. EARTHQUAKES . | . 2. LAB . 2 . - . EARTHQUAKES . - KEY CONCEPTS. Reading seismograms. Geological Time Scale. AIM: . How have stratigraphy and radiometric dating been used to construct the geological time scale?. The History of Earth. Earth’s history has been studied through 2 methods:. 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. Lecture 3. Development of. Geological Concepts, Part I. Major Concepts. In the 17. th. and 18. th. centuries (Age of Reason), application of the scientific method of observation and interpretation began with the purpose of understanding earth processes in the context of the biblical account, but wound up challenging and discrediting that explanation. . The Cenozoic Era. The Modern World Emerges. Tectonics. Major Concepts. The volcanic null that corresponded with the . Laramide. . Orogeny. starting in the late Cretaceous ended in the late Eocene epoch (~40Ma) with the resumption of arc . Lecture 9. Absolute Dating of the Earth. Major Concepts. The discovery of radioactivity in the early 1900’s and the recognition that . radioactive decay . (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. 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 . Midterm 2. Preparation/Review. Style of Questions. Matching term w/ definition. Short definition of concepts/processes. Name some of multiple characteristics. 25% of points from Part II Quizzes. REVIEW . 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.. 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 Semester ‘year1. Fall Semester ‘year2. Spring Semester ‘year2. Fall Semester ‘year3. Spring Semester ‘year3. Fall Semester ‘year4. Spring semester ‘year4. GEOL. 1101 (1). Sci as Profession.