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81 Cards in this Set
- Front
- Back
the study of rock layers, often through the use of drawings is: |
What is stratigraphy? |
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the data used with lithostratigraphy is: |
Rock Type |
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the data used with biostratigraphy is: |
Fossil |
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the data used with magnetostratigraphy is: |
Normal or Reverse paleo geomagnetic polarity |
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the data used with numerical stratigraphy is: |
number of years |
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the data used with Sequence Stratigraphy is: |
sets of coastal deposits laid down by rising and lowering sea levels |
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How are two strata's correlated? |
Using stratigraphy, it shows that two or more strata's are in the same age. |
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How long a time does geologic time cover? |
At least 4.6 billion years |
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What are the 4 hierarchical categories of the geologic time scale? |
Eon, Era, Period, and Epoch |
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Phanerozoic Eon includes what percentage? The Precambrian Eon? |
88% and 12% |
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What is the order of "The age of....": |
Mammals, Reptiles, Amphibians, Fish, Invertebrates |
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a sudden movement of the ground along a fault plane |
What is an earthquake? |
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What causes an earthquake |
Release of energy that accumulated over time Elastic Energy Differential movement of block's interior Energy flows out from the focus in the form of seismic waves |
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the compression and expansion of ground in the direction of wave of movement is: |
P waves are: |
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up/down whip-like waves with vertical ground movement is
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S Waves are: |
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the side-to-side motion of ground, travels through solids only
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Love waves are: |
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Forward-backwards and up-down; travel through both solids and liquids |
Rayleigh
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what is the fastest seismic wave? |
P Waves |
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What is the most destructive to buildings? |
Rayleigh Waves |
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What is an Earthquakes focus? |
the zone within Earth where rock displacement produces an earthquake
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What is an earthquakes epicenter? |
the location on Earth's surface that lies directly above the focus of an earthquake |
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How do the Richter and Mercalli scales for measuring earthquakes differ? |
The Richter scale measures the amplitude of the seismic wave and Mercalli measures the destruction the earthquake caused |
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Since 1920, where and when did the largest Richter magnitude earthquake occur? |
In Chili in 1960 with a magnitude of 9.5 |
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In the ModifiedMercalli Intensity Scale, which Roman numeral rating is characterized bybuildings being shifted off their foundations? |
IX |
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On average, how many major earthquakes are expected to occur a year? |
about 15/16 are expected |
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Reflection of a seismic wave: |
the bouncing off an interface |
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Refraction of a seismic wave: |
bending through an interface |
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How are seismic waves used to determine indirectly what the interior of the Earth is like? |
Seismic waves are like X-Rays, they can be used to look inside the interior |
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What are the three main layers of the Earth? |
Crust, Mantle and Core |
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Which is the thinnest layer? Which is the thickest? |
the thinnest is the crust, the thickest is the core |
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Two Sub-layers of Crust: |
Continental Crust Oceanic Crust |
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Continental crust is: |
Primarily Granite, but also some rocks (all sorts); less dense |
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Oceanic Crust is: |
more dense than continental crust, Primarily basalt.
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The two sublayers of the Upper Mantle: |
Topmost unnamed part of mantle Asthenosphere |
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Two layers of the Mantle: |
Upper Mantle Lower Mantle |
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Topmost unnamed part of the mantle |
solid and brittle, but its rocks are typical mantle types
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Asthenosphere is: |
not solid and brittle, buts it's in a plastic state |
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Lower Mantle (Mesosphere) is |
main part of mantle, its mostly solid, but some parts are plastic or nearly liquid |
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two sub-layers of the core:
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Outer Core Inner Core |
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Outer core is made of? |
Iron in liquid form |
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Inner Core is made of? |
iron is a solid form |
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How do oceanic crust and continental crust differ? |
Continental includes sedimentary rocks, where oceanic does not include any of those rocks. |
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What is the lithosphere composed of? |
all parts of the crust and the topmost unnamed sublayer of the mantle |
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The three types of plate-to-plate boundaries |
Converging, diverging, and transform |
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Converging is: |
when two plates come together, the oceanic crust of one plate dives down (Subducts) under the bottom of the other plate, or colliding |
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Diverging is: |
when two plates move away from each other, the open space between them is filled with magma upwelling from deep within the asthenosphere or spreading apart. |
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Transform is: |
When two plates move past each other without either colliding or spreading apart or slipping past each other, as in a transform fault. |
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Two sublayers of Divergent plate boundaries: |
On the ocean floor On land |
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Three subtypes of converging plate boundaries |
Oceanic-oceanic Oceanic-continental Continental-continental |
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the process of thrusting oceanic lithosphere into the mantle along a convergent boundary |
Subduction |
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A long, narrow trough bounded by normal faults. This represents a region where divergence is taking place. |
Rift valley |
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a continuous mountainous ridge on the floor of all the major ocean basis |
Mid-Ocean Ridge is |
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a chain of volcanic islands generally located a few hundred kilometers from a trench where active subduction of one oceanic slab beneath is occuring |
Volcanic island arc |
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a mass of hotter-than-normal mantle that ascends toward the surface, where it may lead to igneous activity. |
Mantle plume |
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What will go down the subduction zone? |
Oceanic Crust and Top unnamed part of the mantle |
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What will not go down the subduction zone? |
Continental sediment, strata and crust Marine sediment and strata |
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Example of diverging plate boundary in the ocean |
Mid-Atlantic ridge between South America and African plate |
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Example of: Diverging plate boundary on land |
Iceland |
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Example of: Transform plate boundary in ocean or not on land |
Southwest Indian Ridge |
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Example of: Hot spot in the ocean |
The Hawaiian Island |
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Example of: Hot spot on land |
Yellowstone |
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Example of: Oceanic-Oceanic Converging plate boundary |
Marianas Island near the Philippines |
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Example of: Oceanic-Continental Converging plate boundary |
Andes Mountains |
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Example of: Continental-Continental converging plate boundary |
Himalayas Mountains |
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What are the three supercontinenets? |
Rodinia, Pannotia and Pangaea |
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What are the name of the two large land masses that the most recent supercontinent broke into to? |
Laurasia and Gondwana |
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a crustal fragment that consist of a distinct and recognizable series of rock formations that has been transported by plate tectonics |
What is a Terrane?
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Example of: A specific Terrane |
Madagasgar |
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Example of: A region today with many sutured terranes |
The Phillippines |
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What two forces power plate tectonics |
either convection currents in the mantle or plumes in mantle |
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What are the four main methods of plate movement? |
Piggy-back, Plate-pull, Ridge-Push, & Plate Sliding |
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What is Orogenesis? |
All processes involved in mountain building |
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What is Orogeny? |
a specific episode of mountain building |
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What is a mountain chain |
mountains that overlap each other and creates a chain |
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What is a mountain organic belt? |
a series of mountain chains |
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What are the five categories of mountains? |
Volcanic Upwarped/domed Folded Fault-block Mixed |
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Example of: Volcanic Mountain |
Mt. St. Helen & Mt. Fiji |
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Example of: Upwarped/Domed Mountain |
Black Hills |
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Example of: Folded Mountains |
Alps, Ural, Appalachians |
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Example of: Fault-block |
Grand Tetons |
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Example of: Mixture of Mountains |
Rocky Mountains |