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 . 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 All the what, whys and whos.. Geo-morphology: What is it?. Geo . is the Earth.. Morph. is the change of something.. -Ology . is the study of something.. So,. Geomorphology. . is the study of the change of the Earth.. 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?). Physical Weathering. Weathering. is the breakdown of rock or soil. . Physical . weathering occurs when natural forces, such as wind, running water, and moving ice, physically break up rock and soil into smaller particles. . The . surface. features of the Earth change as a result of observable physical and chemical processes . Weathering and Erosion. This is a monument . called Cleopatra’s . Needle. It was carved in Egypt around 1450B.C. The sides are carved with hieroglyphs, the writing of ancient Egypt. It stood in the dry, hot Egyptian desert for over 3000 years. During that time, the hieroglyphs remained distinct.. - 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 Weathering. Weathering is the process that breaks down rock and other substances at the Earth’s surface. . Heat, cold, water, and ice all contribute to weathering.. Repeated freezing and thawing for example can crack rock apart into smaller pieces. . Erosion. The carrying weathered rock from one location to another . Mechanical Weathering. Rock is physically broken down. Smaller pieces have same composition. Chemical Weathering. Rock is chemically broken down. Predict how weathering might reshape surface features (topography). Weathering and Erosion. The top part of the lithosphere—the earth’s surface—changes as rocks are broken down to smaller pieces and carried away.. 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. Weathering can be defined as any. chemical or mechanical process by which rocks exposed to weather undergo changes in character or are broken down into smaller pieces. .. Mechanical Weathering. Mechanical Weathering. August 2021 FREQUENTLY ASKED QUESTIONS What is Chronic Wasting Disease? Chronic Wasting Disease (CWD) is a neurological disease that affects species the deer family (cervids), including deer, elk , What processes cause this to happen?. What can you say about the speed of these processes?. Inference Point. Rockies. 80 milllion years old. Appalachians. 480 million years old. Soil: the foundation for agriculture.