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Geology
1st midterm
54
Geology
Undergraduate 2
09/27/2010

Additional Geology Flashcards

 


 

Cards

Term

 

The process of depositing and burying rock fragments

Definition

 

lithification

Term

 

Sedimentary rocks are weathered into fragments, then turned to stone

Definition

 

clastic

Term

 

4 ways that sedimentary rocks can be formed chemically

Definition

 

dissolution, precipitation,

chemical reaction, decay (no oxygen)

Term

 

What is the least common type of rocks?

Definition

 

Metamorphic

Term

 

How are metamorphic rocks formed?

Definition

 

re-crystallized by heat, pressure, and stress

Term

 

How are regional metamorphic rocks formed?

Definition

 

-tectonic activity

-heat, pressure and stress

Term

 

How are contact metamorphic 

rocks formed?

Definition

 

-country rock is baked by a magma body

-HEAT

Term

 

How are dynamic metamorphic 

 

rocks formed?

Definition

 

-rocks caught in fault zones

- pressure and stress

Term

 

How are igneous rocks formed?

Definition

 

when magma cools and crystallizes

 

Term

 

Extrusive rocks are _______ the 

surface and cool _______

Definition

 

above

rapidly

Term

 

Intrusive rocks are _______ the 

surface and cool _______

Definition

 

below

slowly

Term

 

Rapid cooling of igneous rocks produces .....

Definition

 

small, fine grained crystals

Term

 

Slow cooling of igneous rocks (magma)

produces....

Definition

 

Fewer, coarse, large grained crystals

Term

 

All igneous rocks are made of....

Definition

 

silicate

Term

 

The early earth was made up

of what type of rock?

Definition

 

Igneous

Term

 

What type of volcanoes are the

largest type?

Definition

 

 

Shield Volcanoes

Term

 

What is used to classify

igneous rock?

Definition

 

Texture and Mineral

Term

 

A mushroom shaped intrusive

is called a....

Definition

 

laccolith

Term

 

What type of volcanoes alternate between violent and quiet eruptions?

Definition

 

Composite volcanoes

Term
A crystalline, organic solid with a regular internal order and chemical formual?
Definition

 

 

Mineral

Term

 

What is the color of the powder of a mineral called?

Definition

 

The streak

Term

 

The measure of the heat and pressure at which a metamorphic 

rock forms

Definition

 

 

metamorphic grade

Term

What type of volcano has

alternating layers of ash and lava?

Definition

 

Composite

Term

 

Which property is the most important 

in identifying minerals?

Definition

 

Hardness

Term

 

Coal is what kind of sedimentary rock?

Definition

 

Chemical (decomposition)

Term

 

A granite becomes a schist through...

Definition

 

heat and pressure

Term

 

The idea that most sediment was laid down horizontally when formed

is called....

Definition

 

 

original horizontality 

Term

 

What is uniformitarianism? 

Definition
Processes, structures, and geologic features today are roughly the same throughout history
Term

 

What is cross cutting?

Definition

 

Anything that cuts through a rock is younger than the actual rock

Term

 

What is superposition?

Definition

 

 

The layer on top is the youngest

Term

 

What is cleavage?

Definition

 

The way a mineral breaks into planes

Term

 

What kind of rock makes up

the continental crust?

Definition

 

All three types of rock

Term

 

If the continental crust was melted,

what would it resemble?

Definition

 

Granite

Term

 

What is regolith?

Definition

 

Rock fragments

Term

 

What does the lithosphere contain?

Definition

 

Rocks!!

Term

 

What is the mantle?

Definition

 

The gases trapped in upper part of the earth

Term

 

What is the largest sphere?

Definition

 

Hydrosphere

Term

When enough molecules form and bond together to create a 3-D structure,

it is called a ....

Definition

 

Crystal Lattice

Term

 

Crystal lattices join together to form...

Definition

 

 

minerals

Term

 

Metallic bonding occurs between ...

Definition

 

Atoms of the same element

Term

 

Molecules are formed from atoms by a process called...

Definition

 

Chemical bonding

Term

 

What is the principle of inclusions?

Definition

 

rock materials included in other rocks or sediments are older than the rocks that surround it

Term

 

Absolute time dating is found by...

Definition
Using the 10 radioactive elements
Term

 

 

Phaneritic means....

Definition

 

Slow cooling

Term

 

Aphanitic means...

Definition

 

Quickly cooling

Term

 

Felsic magma is made up of

______ colored minerals

Definition

 

light

Term

 

Intermediate magma is made up of

_______ colored minerals

Definition

 

light and dark

Term

 

Mafic magmas are made up of

_________ colored minerals

Definition

 

dark

Term

 

What is a fumarole

Definition

 

A steam vent from which a small amount of water is boiled away

Term

 

What kind of rocks are known as

secondary rocks?

Definition

 

Metamorphic

Term

 

What is a concordant igneous rock?

Definition

 

An intrusion that is parallel to the 

bedding of rocks

Term

 

What is a discordant igneous rock?

Definition

 

An intrusion that cuts across bedding

or foliation

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