17 October 2011
S.I. Session 20 Quiz
This quiz covers material from the lecture on Friday, October 14th.
Part a) Match the term to its definition:
TERMS:
a)Lahar b)Stratovolcano c)Fumarole
d)Volcanic Dome e)Diatreme f)Caldera
g)Landslide h)Shield i)Continental Flood Basalts
DEFINITIONS:
1)__Debris Avalanche.
2)__Each layer in this type of eruptive style represents many hundreds of flows of basaltic lava.
3)__Mud or debris flow.
4)__In this eruptive style viscous felsic lavas pile up over the vent, which may eventually lead to the explosion of the volcano.
5) __In this eruptive style, the central vent is filled with lava from the previous eruption and lava that has solidified in fissures forms radiating dikes that strengthen the cone.
6)__This eruptive style comes about after an empty magma chamber collapses, leaving a large, steep-walled basin.
7)__ Breccia-filled volcanic pipe that was formed by a gaseous explosion.
8)__Huge outpourings of basaltic lavas, continental fissure eruptions resulting in ~100km thick layers of about ~500km width.
9)__ An opening in the crust, often in the neighborhood of volcanoes, which emits steam and gases.
Part a) Match the volcano to its eruptive style:
Eruptive Style:
a)Volcanic Dome b)Shield Volcano c) Cinder Cone
d)Stratovolcano e)Caldera
Volcano:
1)__Crater Lake, Oregon.
2)__Mt. St. Helens.
3)__Mauna Loa, Hawaii.
4)__Cerro Negro, Nicaragua.
5)__Mount Fuji, Japan.
Part c) True or False:
Mark T (true) or F (false) in the blank provided:
1)__Fissures are similar to dikes.
2)__Gas charged magma explodes.
3)__In a shield volcano, lava can erupt from the sides of the volcano as well as the central vent.
4)__No one has ever seen a diatreme form.
5)__Nicaragua is on a subduction zone.
6)__A dome has been growing in the center of Mt. St. Helens since its eruption in 1980.
No comments:
Post a Comment