Mass movements

Mass movements - Mass movements Earth material slips over a...

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Mass movements - Earth material slips over a plane of failure - often when soil is over-saturated, or shaken by an earthquake - How can humans precipitate them? - adding weight through construction and removing the slope’s toe(support) Wildfires - An unplanned, unwanted fire in wildlands - causes: lightning; human carelessness - What increases susceptibility? - drought, heat wave, global warming - Formerly, “all fires are bad” - Now using controlled (or prescribed) burns - reduces accumulation of ground litter North America PART II: Settling and occupying the region Surveying - Metes-and-Bounds system - what is it? - transferred from Britain to 13 colonies - sentences to describe property boundaries - uses local geography, distances, and directions - Potential drawbacks? - markers may move or disappear - irregularly shaped properties can have complex boundaries - Not useful for large, unsettled regions - Land Ordinance of 1785 - to raise money; benefit veterans - Distributed new land west of colonies - Established the
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Mass movements - Mass movements Earth material slips over a...

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