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Geology Test 2
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69
Geology
Undergraduate 3
11/01/2011

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Term
Two places in the US that overlie a Hot Spot.
Definition
Mauna Loa and Yellowstone
Term
Two ways calderas form
Definition
form primarily from subsidence but can be from huge explosions like Santorini
Term
Nuee ardente
Definition
particularly fast moving destructive glowing cloud white hot fragments and gases.
Term
Plug dome
Definition
Mono Craters; Mammoth Lake. Used to be inside but volcano erode away.
Term
Two areas that have had massive basalt flow from fissure eruptions.
Definition
Mid Atlantic Ridge and divergent plate boundaries.
Term
Two states where there large batholiths
Definition
Idaho and California
Term
What type of plate boundary that causes most volcanoes
Definition
convergent
Term
Three main types of volcanoes and there characteristics
Definition
Sheilf Cinder and Composite
Term
List 2 types of lava flow, their general appearance, and relative speed of flow
Definition
Pahoehoe- very fluid, fast-moving, ropey appearance when cooled; composed of little quartz and called Mafic Basalt

Aa- viscous, slow moving flows; cools to form jagged surface with sharp spines
Term
Example of Pahoehoe
Definition
Mauna Loa
Term
Example of Aa
Definition
FIND
Term
2 Places in the continental US that may be the next volcano eruption
Definition
Yellowstone Monocrater/Monolake
Term
List 5 indicators of an upcoming volcanic eruptions
Definition
more tremors, tilt of cones, temperature of fumarole gases, greater level of carbon dioxide, loss of magnetic magnetism
Term
Term for the large wave formed by an earthquake of violent volcanic eruption.
Definition
tsunami
Term
Name for a tabular discordant intrusion
Definition
dike
Term
name for a tabular concordant intrusion
Definition
sill
Term
name for a lenticular concordant intrusion
Definition
basolith
Term
two types of massive discordant intrusions
Definition
stock, batholith
Term
do crosscutting relationships like intrusions allow absolute age-dating of country rock and why
Definition
FILL IN LATER
Term
Type of mass-wasting that is confined to a channel
Definition
mudflows
Term
lahar
Definition
special type of mudflow caused by eruption of volcanic ash on snow ice on the sides of the cone
Term
type of mass-wasting involving snow
Definition
earthflow
Term
type of mass-wasting that causes hummocky topography
Definition
earthflow
Term
type of mass-wasting common where rocks are tilted
Definition
creep
Term
Type of mass-wasting that causes the most monetary damage nationwide
Definition
creep
Term
Means to prevent or slow down mass-wasting
Definition
retaining walls, rock bolts, injection of grout, deep-rooted vegetation, steps on the sides of the roads
Term
mass-wasting
Definition
the transfer of rock and soil downslope under the influence of gravity
Term
Shield Volcanoes
Definition
all lava flows; the largest in size; very broad with shallow slopes of less 10% ex. Kilauea Hawaii. LARGEST
Term
Largest type of volcano
Definition
Shield volcanoe
Term
Cinder Cone
Definition
all pyroclastic material; greater than 30% slopes; steep sides but these are the smallest types ex. Sunset Crater Arizona.
Term
Composite or Strato-Volcamo
Definition
alterating lava flows with pyroclastic flows or eruptions ex. Mt. St. Helens, WAS
Term
strato
Definition
worlds most perfect shaped volcano
Term
Plug Domes
Definition
Mono Craters; Mammoth Lake. used to be inside but volcano erodes away
Term
85% of all volcanoes are along the...
Definition
Ring of Fire
Term
nearly all volcanoes are ...
Definition
strato volcanoes
Term
Fissure Eruptions
Definition
massive outpourings of lava along a fissure of fault. more lava comes from these compared to volcanoes.
Term
Deccan Plateau of India-
Definition
likely killed the dinosaurs and 70% of life; eruptions in Brazil at the same time; evidence.
Term
The Traps of Russia
Definition
end of Permian: 90% of all life became extinct on the planet. Jurassic. continual fissure eruptions and gasses
Term
Asteroid Theory on Dinosaur Extinction
Definition
Iridium present in meteorites; rare in crust and found in lava.
Term
Hawaii- Mauna Loa eruption
Definition
quiet pahoehoe flows of basalt; on-going; shield volcano; over a hot spot
Term
Mt. St. Helens eruptions
Definition
1980. Washington; violent pyroclastic eruption; nuees ardente, pyroclastic flows, and mudflows
Term
Are we due for asteroids
Definition
False 12 my to go.
Term
Paricutin Mexico
Definition
1943 small cinder cone
Term
Krakatoa
Definition
1882 violent pyroclastic eruption; tsunami killed 36,000 Indonesia area
Term
Mt. Pelee, martinique Island
Definition
Carribean 1902 deadly nuees ardente
Term
Laki Iceland 1783
Definition
layer of dust worldwide that cooled down the Earth producing a severe winter; Iceland is on the Mid-Atlantic Rift. year of no summer. dark and hazy
Term
Santorini
Definition
1500 BC believed to be the Lost Continent of Atlantis
Term
H2S + rain water
Definition
battery acid
Term
what are the 2 types of craters
Definition
explosion and collaspe.
Term
fumaroles
Definition
the vent issues hot gases for long periods of time ...Mt. Fuji
Term
If the hole is less than 1 mile across it is called a ___.
Definition
crater
Term
If the size of the hole is greater than 1 mile across is called a ______.
Definition
caldera
Term
Would there ever be a volcano in LA?
Definition
no
Term
What is the only mineral that is naturally magnetic
Definition
Magnetite
Term
Pluton
Definition
any body of intrusive igneous rock, usually granite; named for the roman god of the underworld
Term
What is the geothermal gradient is ?
Definition
1 degree per 100 ft.
Term
Dike
Definition
tabular and discordant
Term
Sill
Definition
tabular and concordant
Term
laccolith
Definition
lenticular and concordant
Term
discordant
Definition
pluton cuts across existing rock; layers if sedimentary
Term
concordant
Definition
pluton does not cut across the pre-existing rock
Term
Talus slopes
Definition
freeze thaw.. part of rockfalls
Term
Tabular
Definition
table top shaped concordant
Term
Massive
Definition
large irregular shape discordant
Term
Weathering
Definition
is the first step in the process of erosion and transpiration of sediment, as well as, the formation of soil.
Term
Factors affecting weathering
Definition
rock structures, topography, vegetation, organisms, climate.
Term
physical weathering processess
Definition
crystal growth, expansion due to unloading, thermal expansion
Term
thermal expansion
Definition
causes granular disintegration particularly of granitic rocks composed of different crystal types. differential expansion and contraction of crystals.
Term
grus
Definition
a type of poor soil formed on granite and composed primarily of the crystals that make up granite
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