GEOG 2500 Lecture Notes - Lecture 10: Soil Fertility, Downhill Creep, Sedimentary Rock
30 Jul 2018
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Geog2500 lecture 10: movement of soil material that is physical, linked with agriculture activity. Process transforms soil and rock into sediments, such as minerals, soil and vegetation remains. Sedimentary rock- sediment that has solidated into other materials such as limestone and coal ie coal (many years deposited) Tied to vegetation cover, holds the soil in place, downward spiral of land degradation and vegetation. Removes top layer of soil, holding most nutrients and organic matter, movement further in towards rooting depth, positive feedback movements. Restricted to certain environments, slow process, more soil forming than erosion (development is faster) geological erosion is therefore less destructive. Streams can change landscape through erosion: gacial erratics- force, appears unnatural. Al(cid:271)erta (cid:271)adlands ie (cid:862)(cid:271)adlands(cid:863) area of soft ro(cid:272)k de(cid:448)oid of (cid:448)egetation and soil (cid:272)o(cid:448)er that has (cid:271)een e(cid:454)tensi(cid:448)el(cid:455) eroded by water and (cid:449)ind, (cid:862)dinosaurs fossils of the (cid:449)orld(cid:863)-al. Vegetation acts as a protective layer over erosion, climate in places like alberta is dry to support vegetation.
