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CH 10 Volcanoes & 11 Mountains
Mountains, plate boundaries, stress, orogenies, faults, folds
48
Science
10th Grade
10/18/2011

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Term
Name the three types of stress:
Definition
compressional
tensional
shear
Term
Name the types of permanant rock deformation:
Definition
ductile
brittle
Term
What is produced from ductile deformation?
Definition
Folds
Term
What are the two types of folds?
Definition
Syncline
Antilcine
Term
What are the three types of faults?
Definition
Normal
Reverse
Strike Slip
Term
What are the 4 types of mountains covered in our book?
Definition
folded
fault-block
dome
volcanie
Term
Folded mountains are typically produced due to which type of stress?
Definition
Compressional
Term
Fault-block mountains are typically produced due to what type of stress?
Definition
Tensional
Term
What type of deformation occurs at folded mountains?
Definition
Ductile->folds-> anticlines and synclines
Term
What type of deformation typically occurs at fault-block mountains?
Definition
brittle->faults-> normal, reverse, or strike slip
Term
What type of stress is responsible for volcanic mountains.
Definition
NONE- its not applicable at hotspots
OR
Compressional at a convergent boundary
Term
What causes a dome mountain to form?
Definition
Upward lifting of the basement rock/
Compressional Stress
Term
Give an example of a folded mountain range:
Definition
Himalayas- C-C convergent boundary
Northern Rockies
Applachians
Andes
Alps
Urals
Term
Give an example of a fault-block mountain range:
Definition
Tetons
Sierra Nevadas
Mid Ocean Ridge
Term
Give an example of a dome mountain:
Definition
Black Hils (SD)
Yosemite
Term
Give an example of a volcanic mountain:
Definition
Hawaii
Iceland
Term
Does rock deformation occur at volcanic hotspots?
Definition
NO
Term
How are mountain types classified?
Definition
byt the processes that form them
Term
volcano
Definition
any opening in Earth's crust where molten rock and/or gases exit
Term
How many types of volcanoes did we study? Name them:
Definition
1. Cinder
2. Shield
3. Strato or Composite
4. Lava Dome
Term
Which type of volcano has the smallest "footprint" on the crust?
Definition
Lava Dome (200ft)
Cinder (1,000ft)
Term
Which type of volcano has the largest "footprint" on Earth's crust?
Definition
Shield (3-4miles)
Term
Which two types of volcanoes are the tallest?
Definition
Strato and Cinder
Term
Which type of volcano has quiet or non-explosive erruptions?
Definition
Shield
Term
Which type of volcano has only explosive erruptions?
Definition
Cinder
Term
Which type of volcano alternates between explosive and quiet eruptions?
Definition
strato or composite
Term
Hawaii is an example of which type of volcano?
Definition
Shield/Hotspot
Term
What type of plate boundary will produce compressional stress?
Definition
Convergent
Term
What type of plate boundary produces tensional stress?
Definition
Diverging
Term
What type of plate boundary will produce fault-block mountains?
Definition
divergent
Term
What type of plate boundary typically creates folded mountains?
Definition
Compressional
Term
What three characteristics of magma will affect how it errupts?
Definition
Composition (Silica content)
Gas Content
Temperature
Term
Describe the magma you would find from a violent erruption: (Silica content, gas, temperature)
Definition
High Silica
High Temperature
High Gas Content
Term
With an increase in temperature, the viscosity __increases/decreases__.
Definition
Decreases (becomes more runny)
Term
Describe pahoehoe lava:
Definition
Smooth, glassy surface or ropy.
Term
Describe a'a lava:
Definition
sharp, jagged fragments
Term
Name the three types of magma:
Definition
1. Mafic (basalt)
2. Intermediate (Andesite)
3. Felsic (rhyolite)
Term
Which type of magma typically produces quiet (non-explosive) erruptions?
Definition
Mafic (Basalt)
Term
Which type of magma typically produces explosive type of erruptions?
Definition
Felsic
Term
Which type of magma is the MOST viscous? (Has the highest viscosity)
Definition
Felsic
Term
Which type of magma has the lowest viscosity?
Definition
Mafic
Term
What is the most dangerous product of a volcanic erruption?
Definition
pyroclastic flow
Term
Describe a pyroclastic flow:
Definition
A very hot mixture of gases that race down the sides of composite volcanoes at speeds of up to 124mph
Term
What is a caldera?
Definition
A large depression in a volcanoe typically where a large crater has collapsed
Term
What is the magma chamber?
Definition
The location in the crust where the magma builds pressure before errupting.
Term
Why does magma rise upward in the crust?
Definition
Its less dense that the rock around it.
Term
What type of plate "setting" is used to describe volcanoes such as Hawaii or Yellowstone?
Definition
Hotspots or Intraplate settings (not on a boundary but "in" the middle of a plate)
Term
What is a volcanic arc?
Definition
a ) shaped line of volcanoes (seen from above) typically formed at a convergent boundary. Can be a C-O or an O-O convergent boundary.
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