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Exam 2
questions from exam 2
34
Geology
Undergraduate 2
12/08/2011

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Cards

Term
What volcanoes does Hawaii have?
Definition
Hot spot
Term
What is a lahar?
Definition
mud flow by volcano
Term
What volcanoe type has lava flows?
Definition
Shield volcanoes
Term
Common volcanoe gasses?
Definition
carbon dioxide and sulfur dioxide
Term
Pahoehoe?
Definition
smooth, ropy lava
Term
volcano activity occurs at which plate boundaries?
Definition
convergent and divergent
Term
Where is a composite (strato volcano?
Definition
St. Helens
Term
What was Strange about St Helens?
Definition
Northward lateral blast
Term
Which volcanoe type produces mafic magma?
Definition
Shield Volcanoe
Term
What is the best form of mitigation from volcanoes?
Definition
hazard zone map
Term
Violent Eruptions are caused by what?
Definition
high gas and silica content
Term
Which aspect of volcanoes affects the biggest land area?
Definition
ashfall
Term
What is smooth ropey lava?
Definition
Pahoehoe
Term
What are the signs to tell an eruption is imminent?
Definition
earthquake swarms, gas emissions, swelling and tilting
Term
What is a benifit of volcanoes?
Definition
Good Soil
Term
What are the boundaries of watersheds called?
Definition
divides
Term
What is the base level of a river?
Definition
Elevation that the river can not flow any deeper
Term
What is the mathmatical relationship with rivers?
Definition
Discharge=area*velocity
Term
Waht is change in elevation called?
Definition
gradient
Term
What is a natural levee?
Definition
Mounds of alluvium
Term
What is a delta?
Definition
Sediment-laden stream coming to the ocean
Term
What is the land area that contributes water to a stream?
Definition
watershed
Term
Where do rivers cut down into the ground and are symmetrical?
Definition
upland area
Term
What is not a sediment load?
Definition
oranic load
Term
What changes the river's ability to carry sediment?
Definition
velocity, cross secrtional area, discharge
Term
What does not describe the shape of a wave?
Definition
fetch
Term
What is not a part of a beach?
Definition
swell
Term
What is not hard stabilization?
Definition
estuaries
Term
What are dune restoration and beach nourishment?
Definition
soft stabilization
Term
What is used to categorize hurricanes?
Definition
wind speed
Term
What is the biggest hazard from hurricanes?
Definition
storm surge
Term
What puts Sanfrancisco at risk for landslides?
Definition
steep slopes, weak rocks, intense winter rainstorms
Term
What is a type of landslide?
Definition
Deep seated
Term
What would a hydrologist use to monitor a river flood (as it is happening)?
Definition
hydrograph
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