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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?

the data used with lithostratigraphy is:

Rock Type

the data used with biostratigraphy is:

Fossil

the data used with magnetostratigraphy is:

Normal or Reverse paleo geomagnetic polarity

the data used with numerical stratigraphy is:

number of years

the data used with Sequence Stratigraphy is:

sets of coastal deposits laid down by rising and lowering sea levels

How are two strata's correlated?

Using stratigraphy, it shows that two or more strata's are in the same age.

How long a time does geologic time cover?

At least 4.6 billion years

What are the 4 hierarchical categories of the geologic time scale?

Eon, Era, Period, and Epoch

Phanerozoic Eon includes what percentage?


The Precambrian Eon?

88% and 12%

What is the order of "The age of....":

Mammals, Reptiles, Amphibians, Fish, Invertebrates

a sudden movement of the ground along a fault plane

What is an earthquake?

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



the compression and expansion of ground in the direction of wave of movement is:



P waves are:

up/down whip-like waves with vertical ground movement is

S Waves are:

the side-to-side motion of ground, travels through solids only

Love waves are:

Forward-backwards and up-down; travel through both solids and liquids

Rayleigh

what is the fastest seismic wave?

P Waves

What is the most destructive to buildings?

Rayleigh Waves

What is an Earthquakes focus?

the zone within Earth where rock displacement produces an earthquake

What is an earthquakes epicenter?

the location on Earth's surface that lies directly above the focus of an earthquake

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

Since 1920, where and when did the largest Richter magnitude earthquake occur?

In Chili in 1960 with a magnitude of 9.5

In the ModifiedMercalli Intensity Scale, which Roman numeral rating is characterized bybuildings being shifted off their foundations?

IX

On average, how many major earthquakes are expected to occur a year?

about 15/16 are expected

Reflection of a seismic wave:

the bouncing off an interface

Refraction of a seismic wave:

bending through an interface

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

What are the three main layers of the Earth?

Crust, Mantle and Core

Which is the thinnest layer? Which is the thickest?

the thinnest is the crust, the thickest is the core

Two Sub-layers of Crust:

Continental Crust


Oceanic Crust

Continental crust is:

Primarily Granite, but also some rocks (all sorts); less dense

Oceanic Crust is:

more dense than continental crust, Primarily basalt.


The two sublayers of the Upper Mantle:

Topmost unnamed part of mantle


Asthenosphere

Two layers of the Mantle:

Upper Mantle


Lower Mantle



Topmost unnamed part of the mantle

solid and brittle, but its rocks are typical mantle types

Asthenosphere is:

not solid and brittle, buts it's in a plastic state

Lower Mantle (Mesosphere) is

main part of mantle, its mostly solid, but some parts are plastic or nearly liquid

two sub-layers of the core:

Outer Core


Inner Core

Outer core is made of?

Iron in liquid form

Inner Core is made of?

iron is a solid form

How do oceanic crust and continental crust differ?

Continental includes sedimentary rocks, where oceanic does not include any of those rocks.

What is the lithosphere composed of?

all parts of the crust and the topmost unnamed sublayer of the mantle

The three types of plate-to-plate boundaries

Converging, diverging, and transform

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

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.

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.

Two sublayers of Divergent plate boundaries:

On the ocean floor


On land

Three subtypes of converging plate boundaries

Oceanic-oceanic


Oceanic-continental


Continental-continental

the process of thrusting oceanic lithosphere into the mantle along a convergent boundary

Subduction

A long, narrow trough bounded by normal faults. This represents a region where divergence is taking place.

Rift valley

a continuous mountainous ridge on the floor of all the major ocean basis

Mid-Ocean Ridge is

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

a mass of hotter-than-normal mantle that ascends toward the surface, where it may lead to igneous activity.

Mantle plume

What will go down the subduction zone?

Oceanic Crust and Top unnamed part of the mantle

What will not go down the subduction zone?

Continental sediment, strata and crust


Marine sediment and strata

Example of diverging plate boundary in the ocean

Mid-Atlantic ridge between South America and African plate

Example of: Diverging plate boundary on land

Iceland

Example of: Transform plate boundary in ocean or not on land

Southwest Indian Ridge

Example of: Hot spot in the ocean

The Hawaiian Island

Example of: Hot spot on land

Yellowstone

Example of: Oceanic-Oceanic Converging plate boundary

Marianas Island near the Philippines

Example of: Oceanic-Continental Converging plate boundary

Andes Mountains

Example of: Continental-Continental converging plate boundary

Himalayas Mountains

What are the three supercontinenets?

Rodinia, Pannotia and Pangaea

What are the name of the two large land masses that the most recent supercontinent broke into to?

Laurasia and Gondwana

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?

Example of: A specific Terrane

Madagasgar

Example of: A region today with many sutured terranes

The Phillippines

What two forces power plate tectonics

either convection currents in the mantle or


plumes in mantle

What are the four main methods of plate movement?

Piggy-back, Plate-pull, Ridge-Push, & Plate Sliding

What is Orogenesis?

All processes involved in mountain building

What is Orogeny?

a specific episode of mountain building

What is a mountain chain

mountains that overlap each other and creates a chain

What is a mountain organic belt?

a series of mountain chains

What are the five categories of mountains?

Volcanic


Upwarped/domed


Folded


Fault-block


Mixed

Example of: Volcanic Mountain

Mt. St. Helen & Mt. Fiji

Example of: Upwarped/Domed Mountain

Black Hills

Example of: Folded Mountains

Alps, Ural, Appalachians

Example of: Fault-block

Grand Tetons

Example of: Mixture of Mountains

Rocky Mountains