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18 Cards in this Set
- Front
- Back
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3 Factors for Formation of Dunes: |
1. Wind Speed and Direction 2. Available sand supply 3. Vegetation cover, if any, & how its distributed |
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4 Types of Dunes: Barchans |
* Crescent Shaped *Formed where limited sand supply is * Steep slip face on inward or concave side |
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4 Types of Dunes: Transverse Dune |
*forms where more sand supply is *perpendicular to wind direction |
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4 Types of Dunes: Parabolic Dune |
*Similar to Brachans, except deeply curved and convex in downwind direction |
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4 Types of Dunes: Longitudinal Dune |
*one of largest type of dune *Symmetrical ridge of sand that forms parallel to wind direction |
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2 Types of Folds: Anticline |
Limbs of fold dip away from axial plane |
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2 Types of Folds: Syncline |
Limbs of fold dip towards axial plane |
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3 Types of Faults: Normal Fault |
Where hanging wall side of fault moves down in relation to the footwall side of fault |
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3 Types of Faults Reverse Fault |
Where hanging wall side of fault moves up in relation to the footwall side of fault |
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3 Types of Faults Strike-Slip Faults |
Where horizontal movement between fault plane has taken place Two types: Right Lateral Fault and Left Lateral Fault |
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5 affects of Earthquakes: Ground Motion |
* Trembling and shaking of land *Movement is visible in large earthquake *Can topple buildings, destroy structures |
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5 affects of Earthquakes: Fire |
*Serious problem resulting from broken main gas, water, and power lines *1906 San Francisco earthquake-fire caused more damage than earthquake |
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5 affects of Earthquakes: Landslides |
* can be triggered by ground motion |
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5 affects of Earthquakes: Liquefaction |
*water saturated soil turns from solid to liquid *as a result of ground shaking |
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5 affects of Earthquakes: Aftershocks |
*small earthquakes following main one * can result in significant damage * 1995 Kobe, Japan; 1999 Taiwan; 1994 Northridge, CA |
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3 Types of Plate Boundaries Divergent Plate Boundaries |
* Plates move away from one another * Associated with mafic-basaltic lavas *Also called constructive plate boundaries *on seafloor located at crest of mid-oceanic ridge |
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3 Types of Plate Boundary's: Convergent Plate Boundaries |
*Two plates move towards one another *Also called destructive plate boundaries *types: Oceanic-Oceanic (Mariana Trench); Continental-Continental (Alps); Oceanic-Continental (Andes Mountains) |
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3 Types of Plate Boundary's: Transform Plate Boundary |
*Where plates side by one another *Characterized by horizontal movement along fault plane *Movement along plates may result in earthquakes *Also called conservative plate boundaries *San Andreas fault good example |
