weakens surface rock and makes it more susceptible to pull of gravity. Can be:
Dry or wet
Slow or fast
small or large
free-fall or gradual
function of a driving force, a resisting framework and time. TIME is key variable.
*If driving force is greater tan resisting framework = failure.
Mass movements occur when a geomorphic threshold is exceeded:
Falls and Avalanches
7.5 on Richter scale
Land was displaced 21 feet at its maximum extent
movemet along a planar surface roughly parallel to the angle of the slope.
Madison Canyon example.
occurs when surface material moves along a concave surface. Ex. Slump- when small block of land shifts downward.
When moisture content of material is high.
inplace physcial disintegration and chemical decomposition of rocks at or near the earths surface.
Physical (Mechanical weathering)
outer layers expand more than underlying rock and separate from the rock body
ex. stone mountain, half dome
general process that produces exfoliation domes
-characterized by splitting off of slablike sheets of rock
-occurs because of reduction in pressure when overlying rock is eroded away
plant roots, burrowing animals, humans, etc.
mechanical weathering makes chemical weathering more efficient by increasing surface area.
-Greater the surface = more area for chemical attack.
"StudyBlue is great for studying. I love the study guides, flashcards and quizzes. So extremely helpful for all of my classes!"Alice , Arizona State University
"I'm a student using StudyBlue, and I can 100% say that it helps me so much. Study materials for almost every subject in school are available in StudyBlue. It is so helpful for my education!"Tim , University of Florida
"StudyBlue provides way more features than other studying apps, and thus allows me to learn very quickly!??I actually feel much more comfortable taking my exams after I study with this app. It's amazing!"Jennifer , Rutgers University
"I love flashcards but carrying around physical flashcards is cumbersome and simply outdated. StudyBlue is exactly what I was looking for!"Justin , LSU