ESCI 401 Lecture Notes - Lecture 15: Clastic Rock, Laminar Flow, Turbulence

• School: UNH
• Department: Earth Sciences
• Course: ESCI 401
• Professor: Boettcher, Margaret S.

Document Summary

Give three examples of mechanical and chemical weathering processes, mechanical i. : thermal expansion outer layer of rocks breaks off in sheet-like pieces due to heating. : animal attack: chemical, minerals in a rock are chemically changed or dissolved. : acid rain breaks apart ionic bonds that hold calcium and carbonate together in limestone. 1. ii. iii. iv. v. i. i. i. Fungi and other life forms: what are three ways particles move downstream, suspension, saltation, rolling. Large particles get rolled along bed: what are three kinds of sedimentary basins and where do they form, what are the five steps that create sandstone from sand, 5 steps to creating clastic sedimentary rocks. Clastic = cemented together pieces of previous rocks i: weathering, physical or chemical breakdown of rocks, physical i. Fragmentation by mechanical processes: chemical, minerals in a rock are chemically changed or dissolved iii. Erosion: no weathering fresh or unweathered , processes that dislodge weathered particles, abrasion, plucking, dissolution.