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Transcript
Lecture Notes - 11 Mountain Forming
11.1 Rock Deformation
Factors Affecting Deformation
temperature, confining pressure, rock type, and time.
•
Deformation - all ____________ original ___________ and/or size of rock body.
Most crustal deformation occurs ______________________________.
•
Stress = force per unit area (_________________) Show Picture 
•
Strain = change in shape/volume of rock from stress. Show Picture 
Temperature and Pressure
•
_____________________ by: _______ deformation and _______ deformation.
Brittle deformation ________________once strength is exceeded.
Ductile deformation = solid state _______ that produces a ________________________
without fracturing the object.
Rock Type
Mineral composition and texture affect deformation
Time - rock will deform over a long period of time.
Types of Stress
_____________ stress, ____________ stress, and _____________ stress.
Draw Pictures 
Folds (in sedimentary rock strata)
•
Anticlines upfolding, or ___________________
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Synclines linear ___________________________ found with anticlines
•
Monoclines large step-like folds.
Faults
Normal Faults - ___________ wall block ______________ relative to the footwall block
Reverse Faults __________ Faults - hanging wall block ___________ relative to footwall
Thrust Faults reverse faults with _____________________________)
Strike-Slip Fault - movement is ___________ to the trend, or _____, of the fault surface.
Joints - __________________ with no appreciable movement.
11.2 Types of Mountains
Folded Mountains classified by processes that __________________.
Orogenesis = _____________________________________________
Fault-Block Mountains
Large-scale _____________________  fault-block mountains.
•
blocks of crust are __________________________
•
Grabens - __________________________ of fault-bounded blocks.
•
__________ = elongated, ______________________ of crust bounded by faults.
Domes and Basins - __________ or elongated structure (formed by _________ of the
underlying ____________________.)
Orogenesis refers to those processes that produce what? _______________________
11.3 Mountain Formation - Mountain Building at Convergent Boundaries
Colliding plates  ___________ that _________________, and metamorphose thick
layers of sediments ______________ at the edges of landmasses.
Mountain Building at Convergent Boundaries
____________________ Convergence - produces ___________________________.
 Ocean-Continental Convergence - __________ mountains and __________________.
•
An ______________________________ = accumulation of sedimentary and
metamorphic rocks (________ some scraps of ______________________).
Mountain Building at Divergent Boundaries - along ocean ridges = ______ type mountains.
Continental Accretion-process when ________ collide with & stay connected to a_______
Terranes
•
any crustal fragments that have a geologic history distinct (different) from
adjoining fragments that _____ along the Pacific Coast.
Principles of _____________________ - Isostatic Adjustment for Mountains
•
Earth’s _______________________ in gravitational balance upon mantle.
•
deformed and thickened crust will undergo regional uplift.
•
Isostatic adjustment = process of establishing a __________________________
DRAW
The collision and joining of crustal fragments to a continent is called