PPT-Magma that solidifies below ground forms geologic features

Section 3 Intrusive Activity K What I Know W What I Want to Find Out L What I Learned Essential Questions How are features formed from magma that solidified under Earths surface described. Chapter 9 . Section 1. Volcanic Eruptions. Volcanoes – areas of Earth’s surface through which magma and volcanic gases pass. In seconds a volcanic eruption can turn an entire mountain into a cloud of ash and rock. GEOL 2110. Lecture 2. Scales of Time and Change. Major Concepts. Geological events cover huge amounts of time that are hard to grasp in the span of human life. We tend to focus on dramatic, short-lived geologic events that we witness and are unaware of subtle, but geologically important events . 01: . Geologic Time . Scale. Huge sections of time are broken down into smaller groups of time:. E. ons, Eras, . P. eriods, and . E. pochs. Eon. is the largest time block. . (kind of like what we would think of as years).. T. Lebrun. 1. , H. Massol. 1. , E. Chassefière. 1. , A. Davaille. 2. , E. Marcq. 3. , P. Sarda. 1. , F. Leblanc. 3. , G. Brandeis. 4. . 1 . Univ Paris-Sud, Laboratoire IDES, UMR8148, Univ. Paris-Sud, CNRS, Bât. 504, Orsay, F-91405, France;. How long ago were the dinosaurs here? How do we even describe geologic time anyway?. EONS. which are divided into . ERAS. ,. which are divided into. . PERIODS. ,. which are divided into. . EPOCHS. The Constructive Side of Volcanoes. Viscosity. Viscosity is the property of matter that allows it to hold it’s shape (or the property that allows it to resists flowing).. Low Viscosity means that it is more runny/thin (like water).. In depth: chapter 19. Geologic Time Scale. Examining layers of sedimentary rock, scientists have put together a chronology of Earth’s history.. It is divided into 4 Eras:. 1. Precambrian (3.5 . bya. 1. Temperature. 2. Pressure. 3. Addition of fluids. Lava Flows. Pahoehoe. – hot fluid lava. Least viscous. Aa. – forms sharp rock. Blocky – chunky rock. Most viscous. Types of Volcanoes. Cinder Cone – explosive eruptions. Section 18-1. Magma. Objectives:. Describe factors that can affect the formation of magma. Compare and contrast the different types of magma. Volcanic Eruptions. In the last 10,000 years more than 1500 major volcanic eruptions have been recorded…where and why do these eruptions occur?. Section 12.1 Discovering earth’s history. Uniformitarianism – the idea that physical, chemical, and biological laws that operate today also operated in the past; the present is the key to the past.. Magma Oceans in the Inner Solar System Linda T. Elkins- Tanton Magma Oceans Planetecimals accreted first 1.5M.A. of Solar System 1694- Gottfried Wilhelm Leibniz : Suggested Earth began as a uniform liquid and differentiated as it cooled Section 2: . Eruptions. K. What I Know. W. What I Want to Find Out. L. What I Learned. Essential Questions. How does magma type influence volcanic activity?. What is the role of pressure and dissolved gases in eruptions?. Normally we think of time in terms of days or years but geologists commonly refer to events that happened millions or billions of years ago. For example earth is approximately 4.6 billion years old. GEOLOGIC TIME. GLY 4310 - Spring. , 2020. 2. Magma Series Definition. A group of rocks that share some chemical, and sometimes mineralogical, characteristics. They share patterns on chemical variation diagrams which suggests a genetic relationship – beyond the scope of this course.