Study Guides (248,368)
United States (123,354)
Geography (10)
GEG 120 (10)

Notes Test 3 3.21.13.docx

2 Pages
Unlock Document

GEG 120
Peter Muller

Minerals and Igneous Rock (cont.) -Weathering: in-place disintegration of rocks -Mass Movement: gravity induced spontaneous down slope movement of earth materials -Erosion (our main concern) -transport of weathered and mass-moved materials from original site (eventually down to the ocean) -further breakdown during transit (as they are moving down) -4 Erosional Agent Erosional Agents are: -Running Water: canyon has taken 22 million years for it to be eroded down about 3,000 miles because of the water and stuff -Wind: particularly important in and around desserts -Glacial Ice: some mountainous areas -Coastal Waves Aggradational Processes -Deposition of eroded materials where transport velocity slows -Building landforms exs. dry river delta and the outer banks Look at the Geologic Time Scale page. 471 helps you realize how old the earth is -Cenozoic -Mesozoic: somewhere in there life was destroyed major extinction CONTINENTAL DRFIT Early 1600's observation of jigsaw-like fit of south american and african ladmasses -breakup of ancient supercontinent hypothesized by Alfred Wegener in 1915 fragmentation and outward continental drift Pangaea: Laurasia & Gondwana -Rejected and ridiculed by geologists: no evidence RISE OD PLATE TECTONINCS THEORY -Continental drift hypothesis kept alive -Turning point came in 60's with first maps that revealed the world ocean floor -global network of mid ocean ridges -evidence from dating of seafloor rocks: youngest rocks line mid ocean ridges become progressively older with distance from ridges mid oceanic ridges from global pipeline for upwelling magma -- seafloor spreading Co
More Less

Related notes for GEG 120

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.