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| THEORY OF CONTINENTAL DRIFT |
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Definition
| 1912. The continents were once joined and slowly drifted apart. Not accepted until 1960. |
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Term
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Definition
| 1880-1930. Meterologist. Coined continental drift and sea-floor spreading |
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Term
| EVIDENCE FOR CONTINENTAL DRIFT |
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Definition
1. Matching coastlines-fits like puzzle.
2. Fossil evidence-glossopteris/fern leaf.
3. Evidence from rocks
4. Climatic evidence-equator has glacial scars. |
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Definition
| 1920. Lithosphere divided into 7 major plates. Plates float on aesthenosphere. Plates move in different directions depending on weight and size. Links continental drift and sea-floor spreading. |
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Definition
| Magma and energy rotating. Makes more heat. Proves continental plates move and that new floor is "made." |
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Definition
| 1950. Harry Hess. Ocean floor moves away from ridge, magma rises, cools and replaces with "new" ocean floor. Robert Diaz coined the term. |
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Term
| ROBERT DIAZ AND HARRY HESS |
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Definition
| Sea-floor spreading. Hess "discovered it. Diaz coined term. |
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Term
| MAGNETIC BANDS ON OCEAN FLOOR |
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Definition
| The variation in iron being up welled. Switches polarity(not literally). It can help tell the age of a rock. |
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Definition
| Underwater mountain range in the Atlantic Ocean. |
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Definition
| "Comes together"-Compression. |
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Definition
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Definition
| A fracture along which visible displacement can be detected on one side relative to the other. |
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Definition
| A series of ripples that result from compressional deformation of the lithosphere. |
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Term
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Definition
| Stress-Tension. Boundary-Divergant. Great Rift Valley, Africa. |
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Term
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Definition
| Stress-Compression. Boundary-Convergant. Andes Mts. |
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Term
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Definition
| Stress-Shearing. Boundary-Transform. *San Andres Fault. |
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Definition
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Term
| GREAT RIFT VALLEY, AFRICA |
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Definition
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Definition
| The vibrations of the Earth's surface that carry energy. |
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Definition
| Above the focus(surface), most violent area of shaking. Usually around the origin of the earthquake. |
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Definition
| Place along fault where crust "slips"; Also the origin of the seismic waves. |
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Term
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Definition
Carry energy and create the damage in and Earthquake.
1. P-waves
2. S-waves
3. L-waves |
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Term
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Definition
*Primary Waves(slinky).
*Push-Pull(compression)waves
*Fastest
*First to arrive
*Travels through solid, liquid, gas.
*Weakest. |
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Term
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Definition
*Secondary Waves(Snake).
*Side to side(transverse)waves.
*Second fastest(slower than Pwaves).
*Second to arrive.
*Travels through solids only.
*Stronger than Pwaves. |
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Definition
*Love Waves(Surface Waves).
*Up and Down motion.
*Slowest.
*Travels along Earth's surface.
*Strongest.
*Most destructive. |
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Definition
| Measurement of the magnitude in an earthquake. |
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Definition
| The difference in time(arrival). |
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Definition
| A major fault line in California. |
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Definition
| A mountain that forms when layers of lava and volcanic ash build up and erupt. |
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Definition
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Definition
| Crust under the Ocean. Denser than Continental crust. |
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Definition
| Crust under continents/"Land Continents". Less dense than oceanic crust. |
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Definition
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Definition
*Layers.
*Filled central vent.
*Radiating dikes. |
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Term
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Definition
*Steep sided
*Piles of tephra
-Tephra- the hardened lave that was thrown from the volcano.
*Large indention.
*Breaks off into different sections in a large area. |
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Term
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Definition
*Quiet eeruptions
*Broad volcano with gently sloping sides.
*Hawaiian Islands and Iceland. |
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Definition
*Causes explosive eruptions.
*Tends to harden in vents.
*Causes pressure build-ups. |
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Definition
*Thin and runny.
*Thick and viscous; slower, slimey |
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