slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Exam PowerPoint Presentation
Download Presentation
Exam

Loading in 2 Seconds...

play fullscreen
1 / 19

Exam - PowerPoint PPT Presentation


  • 267 Views
  • Uploaded on

Exam. Short answer questions Diagram interpretation Some multiple choice Material from discussion sections will be included Lab material will not be covered (although diagrams may be used) Powerpoint presentations at http://www.geology.wisc.edu/~laurel/204/. TECTONIC BASINS.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Exam' - Mercy


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1
Exam
  • Short answer questions
  • Diagram interpretation
  • Some multiple choice
  • Material from discussion sections will be included
  • Lab material will not be covered (although diagrams may be used)
  • Powerpoint presentations at http://www.geology.wisc.edu/~laurel/204/
tectonic basins

TECTONIC BASINS

The sedimentary record of tectonic processes

convergent settings
CONVERGENT SETTINGS
  • Thrust belt typically propagates into foreland basin, moving depocenter in the direction of thrust motion
  • Piggyback Basin: basins that are on the hanging wall of a thrust fault and move with the hanging wall.
  • Sediments evolve from fine-grained turbidites to shallow water continental seds over time
convergent settings6
CONVERGENT SETTINGS

Intracratonic Basin: large-scale basins far from mountain belts that form very wide, gentle synclines. Commonly large but not very deep

locations of intracratonic basins worldwide
Locations of intracratonic basins worldwide
  • Characterized by basins separated by arches or domes. Generally middle Cambrian or younger seds deposited on Precambrian basement. Most seds marine, deposited by epeiric seas (i.e., where ocean transgressed on continent). Deepest parts of basins continued to receive sediments during marine regressions.
transform settings
TRANSFORM SETTINGS
  • Strike-slip fault = a fault on which the movement is parallel to fault’s strike
  • Basins form where irregularities in fault system cause depocenters to form locally
  • Distinctive in that they are not regional in extent
  • Fill with material sourced locally and from plate that is ‘passing by’
transform settings10
TRANSFORM SETTINGS
  • Pull-apart basins - caused by releasing step or dilational jog in fault system
  • Strike-slip basins form in transtensional regimes and are usually relatively small but also deep; they are commonly filled with coarse facies (e.g., alluvial fans) adjacent to lacustrine or marine deposits
    • Examples: Salton Sea, California; Ridge basin, California; Dead Sea, Israel
san andreas fault system
San Andreas fault system

Extends from Mendocino transform-transform-trench triple junction to Rivera ridge-trench-transform triple junction

McDonald et al. (1979)

alpine fault continental trench trench transform
Alpine fault continental trench-trench transform

Grindley (1974)

slide14

Ridge- convergence system transform: Dead Sea rift

Garfunkel (1981)

accretion
Accretion

Terranes are ‘fault-bounded blocks of crust that accrete to the ancient cores of the continents. The process makes the continents increase in extent and rewords them into what amounts to geologic collages’

- David G. Howell (1985)

x section through cordilleran terranes
X-section through Cordilleran Terranes
  • Sutures bound accreted terranes
  • Note that movement by which terranes were emplaced may be reverse or strike-slip