ARH312Y1 Lecture 9: ARH312 2nd Sem Lecture 9
Document Summary
Soils: the product of the weathering of the earth"s crust in situ and of biological activity. Sediment: layers or collections of particles that have been removed from the place where they originally weathered: can later become soils through weathering. Factors affecting soil variability: climate, living organisms. Soil organisms break down organic matter faster. Different types of vegetation contributes differently to the soil: parent material, topography, time. O horizon loose, partly decayed organic matter. B horizon leached materials from above, subsoil. Paleosols soil buried by non-pedalogical layers (i. e. , colluvium, alluvium: sediments deposited on top of the horizon (a once living surface, full soil profile buried by sediments. Geomorphology: the study of landforms and the processes that shape them. Site formation happens under basic geomorphological principles: removal, deposition, alteration. Colluvium sediments deposits through surface run-off and slope activity. Fluvial/alluvial sediments deposited by running water: alluvium loose sediments deposited beside running water. Lacustrine standing water deposits from lakes, marshes, swamps.
