PPT-Applied Geomorphology Lecture 5: Weathering & Mass Wasting Processes

Weathering Chemical Weathering Hydration chemical reaction that consumes H 2 O 2KAlSi 3 O 8 2H 2 CO 3 H 2 O Al 2 Si 2 O 5 OH 4 4SiO 2 2K 2HCO 3 . We focus here on the subsequent denudation of the region influenced strongly by the lithology and structure of the rocks This starts with the exploitation of tectonic structures which further distinguishes th e western Yorkshire Dales from the Lake 1 Mass Wasting The downslope movement of rock, regolith, and soil under the direct influence of gravity Gravity is the controlling force Mass WastingImportant triggering factors Weathering and Erosion. Shaping the Earth’s Crust. The rocks and soil of the earth’s crust are continually being worn down because of a number of processes.. These processes are known collectively as . Causes of mass wasting. Types of mass wasting. slumps. falls . slides. flows. Mass Wasting. . –. . downslope. movement of debris in response to gravity.. http://students.washington.edu/cdcdcd/. Week 6. Questions for Discussion. Would you live on a slope? If so, where?. What level of risk from mass wasting is acceptable to you? (How would you know if the slope risk was assessed accurately?). - slopes Mass wasting Is a collective term addressing all down slope movements of weathered rock (soil) that are created by gravitational forces.Gravity is the primary component!Vocabulary ColluviumS The Study of Earth’s Landforms. Where Do You Live? . =. Earth’s Crust. Earth’s Crust. Geomorphologic Processes. Erosional. earing down of the earth’s surface by wind, water, and/or . ice. Depositional. Topics of Discussion . What Is Wasting?. Defining HIV Wasting. . CDC Definition of HIV Wasting. Limitations for Diagnosis . Definitions of HIV Wasting in the HAART Era. Prevalence of HIV Wasting. Determinants of ≥ 5% Weight Loss Among HIV-Positive Participants in the NFHL Study: Final Multivariate Model . By David T. Allison. Topographic Maps. Scale (Relational Fraction; Graphical). Elevation contours (Relative to M.S.L). Boundary (Latitude & Longitude). Color (Water bodies, Woodlands, etc.). Cultural Features (man-made features). Unit 7 notes. Weathering. What is it?. Disintegration and Decomposition of rocks . Where does it happen?. At or near the surface of the Earth. Weathering. What does this process look like?. Weathering. Unit 7 notes. Weathering. What is it?. Disintegration and Decomposition of rocks . Where does it happen?. At or near the surface of the Earth. Weathering. What does this process look like?. Weathering. W.M. DAVIS. . . . Dr. B.ANU. SUYA. ,. Assistant . Professor & Head,. Department . of Geography,. Government . Geomorphology (. GEO 301). Geology and Geophysics Department. College of Science. King Saud University. What do you see on the Earth’s Surface. We see various types of landforms on the Earths surface . . Earth. ’. s external processes. Weathering. . –. the . physical breakdown. and / or . chemical alteration. of rock at or near Earth. ’. s surface. Mass wasting. . –. the . transfer. of rock and soil .