geography 2
which of the following is a hazard but not a risk, according to the textbook?
a cinder cone that erupts hot molten fragments on an unpopulated pacific island
which of the following sites near a volcano might be relatively less dangerous?
a site on a ridge as opposed to a site in a valley
what are some factors that could allow flood basalts to have high-volume eruptions?
all these allow flood basalts to have high-volume eruptions
which of the following is a location in which flood basalts erupted?
columbia plateau
folds are most often created through what type of stress?
compression
when a rock is subjected to tectonic forces and experiences stress that us not the same in all directions, it is under:
differential stress
the special geologic term used to represent the direction of a horizontal line on an inclined surface(like in a fault) is:
dip
volcanic mudflows (lahars) are common on composite volcanoes because:
large amounts of rain and snowmelt mix with loose ash on steep slopes
which of the following is NOT a common type of volcano?
mesa
how does the strength of the continental crust vary with depth?
rocks become stronger with depth and then get weaker deep in the crust
what type of rocks are most common in a composite volcano?
rocks formed from felsic and intermediate lava flows
which of the following materials is not produced by erupting volcanoes
sandstone
earthquakes in mid ocean ridge settings are generally
shallow and large
a fold in which rocks fold down in the shape of a U is a(n):
syncline
the classic volcano shape is displayed by:
a composite volcano
which of the following is lease likely to be a volcano?
a hill capped by volcanic rocks
what event triggered the main eruption of mount st. helens in may 1980?
a landslide removed rocks and released pressure on the magma
which of the following cannot cause a tsunami?
a strike-slip fault land
the highest death tolls from earthquakes are generally due to
all of the choices are correct
which of the following are erupted by volcanoes?
all of the choices are correct
which of the following are true of felsic magmas?
all of the choices are correct
which of the following can cause extensive damage well after the ground shaking associated with an earthquake stops?
all of the choices are correct
which of the following is common is most calderas
all of the choices are correct
in which of the following ways may earthquakes be generated within a continental plate?
all of these choices are correct
which of the following are potential sources of destruction that may be caused either directly or secondarily by earthquakes?
all of these choices are correct
shield volcanoes commonly have
all the choices are correct
which of the following types of faults does NOT generate earthquakes
all types of faults can be generate earthquakes
a fold in which rock layers warp up in the shape of an A is a(n)
anticline
earthquakes may be caused by
any of these
the largest volcanic eruptions on earth are floods of
basalt magma
if bubbles cannot escape easily from a magma, the resulting eruption is likely to:
be explosive
a single volcano may produce
both explosive and nonexplosive eruptions
a volcanic neck can form by
both of these are correct
sheild volcanoes, such as mauna loa, have what kind of slopes?
broad, gentle
which of the following is NOT a volcanic hazard made worse by being located along a river valley directly downhill from a volcano?
burial by falling ash
which of the following types of eruption is among the most deadly of natural disasters?
caldera-forming
shield volcanoes commonly involve:
fluid lava flows
most earthquakes occur at depth of
less than 100 km
earthquakes at mount st. helens prior to the major eruption in 1980 were caused by:
magma rising in the volcano
the downfall of which ancient civilization in the mediterranean closely followed by the caldera- forming eruption at santorini?
minoan
in order to provide an early warning system, which of the following is least helpful in trying to predict a tsunami?
monitoring earthquakes in continental settings
the relatively small volcanic feature that consist of solidifies lava and some volcanic ash is:
none of these are choices are correct
the largest concentration of composite volcanoes on earth is located along the
pacific ring the fire
volcanic domes commonly are partially destroyed when
steep parts of the dome collapse and cause small pyroclastic flows
which of the following is recognizable characteristic of recent calderas?
steep-sided basic-shaped depression
which are true of faults?
these are all true of faults
shield volcanoes have low slopes primarily because
they are fed from large interconnected composite volcanoes
which of the following is NOT true of volcanic dome?
they are one of the largest of volcanoes
which of the following is not evidence of recent activity at a volcano?
thick, well-developed soil
which of the following are ways that viscosity affects gases in magma?
viscous magma prevents gas from escaping easily
steep-sided hills of viscous lava that pile up over volcanic vents are known as:
volcanic domes