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EARTHSC 2GG3 (199)
Lecture 13

Lecture 13.pdf

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Department
Earth Sciences
Course
EARTHSC 2GG3
Professor
Sergei Basik
Semester
Fall

Description
Sinkholes Land Subsidence and Swelling Soils Lecture 13 October4 2013 Types of Ground MovementGround movements are not as dramatic as earthquakes or volcanoes but cause far more monetary damageSinkholes form when overlying ground collapses into underground cavitiesLand subsidence occurs when sediment becomes more closely packed through groundwater or petroleum extraction or earthquake shakingSwelling soils form from alteration of volcanic ash to clays1 Sinkholes Ground may suddenly collapse into sinkholes tens to hundreds of meters across Can damage houses and roads Can drain streams lakes and wetlands Can channel contaminants directly into underground aquifers
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