PPT-GY111 Physical Geology Deformation of the Earth’s Crust

Stress amp Strain Stress a force applied to an area Example tire pressure in psi Strain a change in original shape or volume produced by stress Elastic strain analogous to a steel spring or rubber band. Liz LaRosa for use with my 5. th. Grade Science Class . http://www.middleschoolscience.com. 2009 . Earth’s Layers. The Earth's rocky outer crust solidified billions of years ago, soon after the Earth formed. . Isostasy. When . gravitational and buoyant forces are equal, a state of . isostasy. exists. . As . erosion wears away the crust, the lithosphere becomes lighter and rises. .. As . erosion continues, the . Justin P. Jones. The World is a canvas. A geologist examines the many stories told by the Earth’s rocks and minerals. . They notice the subtle differences between different rock formations and strive to paint the complete picture of Earth’s history.. Lithosphere. Earth’s Systems (spheres) . Lithosphere - . Earth’s crust and upper . mantle. Atmosphere - . Layers of gases surrounding . Earth . Standard. . S6E5. Students will investigate the scientific view of how the earth’s surface is formed. . a. Compare and contrast the Earth’s crust, mantle, and core including temperature, density, and composition. . An Introduction to Ch 11&12. Regions of the Earth. The Earth is made up predominantly of two major regions:. A predominantly molten, central core. A mostly solid outer mantle and crust. Hydrosphere and Crust . Evolution of the Continents. Important Terms. Craton: interior of continents made of stable Precambrian and Paleozoic . rocks.. Shield: portion of Craton composed of older Precambrian . rocks.. Platform: portion of Craton made of younger Paleozoic . Earth’s Layers Vocabulary. Inner core . – a ball of hot solid metal at the center of the earth. Outer core . – liquid layer of metal that surrounds the inner core. Mantle. . – earth’s thickest layer between the outer core and crust made of magma. The Layers of the Earth. The Earth is an oblate spheroid – the . Solid Earth. . . It is composed of a number of . different layers. as determined by deep drilling and . seismic. evidence.. The Four Basic Layers. “Civilization exists by geologic consent” -Will Durant. Where are the world’s great cities located and why?. Why are Earliest Humans Here?. East African Rift. Water. Animals. Preservation of fossils. Types of Rocks. Rock: an aggregate of one or more minerals. Igneous Rocks: crystallize from a magma. Sedimentary Rocks. Clastic: formed by the erosion of pre-existing rocks. Chemical/Biochemical: precipitated from chemical reactions. Inner Core. Outer Core. Mantle. Crust. The Layers of the Earth. 3. Crust. Thinnest layer; density 3 g/cm. 3. The Earth's . outermost. . layer of the 4 main layers. The crust is typically about . 30-40 km thick beneath continents. Our Earth is made up of rock, air, water and living organisms.. Rock = Geosphere. Air = Atmosphere. Water = . Hydrosphere. Living organisms = Biosphere. The Earth as a System. Earth is composed of rock – both solid and molten – as well as various metallic elements.. The geology of Iraq as a study is closely depended on basic geologic branches, such as tectonics, . stratigraphy. , . sedimentology. , petrology, paleontology and structural geology. On the other hand, there are some applied branches in geology directly related to studying geology of Iraq, such as petroleum geology, hydrogeology and economic geology. To understanding the geology of Iraq, we must return to tectonic and .