Geology
the study of the earth
geology
rocks that bend upward
anticline
what type of mountain is formed when molten rock erupts from a hole in the earth's crust
volcanic
the study of earthquakes
seismology
what is an opening in which gases, ash, etc. come out of a volcano
vent
the outer layer of the earth
crust
what is the boundary between stationary rocks and moving rocks
fault
what type of mountain appears to form when molten rockis forced underneath a rock layer
domed
tremor
what type of volcano is a gently sloping cone
shield
the most abundant element in the earth's crust
oxygen
the theory that plates affect many geologic structures
plate tectonics
what type of mountain forms when the edges of two adjacent tectonic plates were pushed together
folded
smaller earthquakes that follow an earthquake
aftershocks
where are more than half the worlds active volcanoes located
Ring of Fire
the lower boundary of the crust
Moho layer
plates float on the _____________, seems to be " plastic rock "
asthenosphere
what type of mountain forms when rocks on either side of a fault fall down and the other sides rises up
fault-block
the most active zone of earthquakes
circum-Pacific belt
when lava hardens and has a smooth surface it is called what ?
pahoehoe
where is the transition layer located
inbetween the upper mantle and lower mantle
what type of fault is when rocks along a fault move horizontally to each other
strike-slip fault
what type of map shows an area's elevation and natural features
topographic map
what does the EEW do ?
warns people of an earthquake
solid particles that are ejected from a volcano and are bigger than 64mm ( 2.5in ) are called what ?
lapilli