Vocab
this word refers to anything to do with molten earth materials
What is igneous
volcanoes are this kind of volcanism
What is extrusive?
along with structure and activity, this is another way to classify volcanoes
What is explosivity?
Vertical intrusive features are called this
a hot spring in a place where there are thick layers of tephra
a deep, large structure formed under the earth's crust, made of igneous rocks
What is a batholith?
a rapid downhill movement of solid volcanic particles suspended in steam is called this
What is pyroclastic flow (or glowing avalanche)
This kind of volcano takes up the most land area
What is a shield volcano?
a spring that ejects large quantities of hot water and steam forcefully is known as this
what is a geyser?
This is a layer of loose pyroclastic material and ash that settles and covers the ground; a common cause of death and damage from volcanic eruptions
what is tephra?
the depression at the top of the volcano
What is a crater?
This element determines the viscosity of lava
what is silica?
this scale for explosivity is open-ended, meaning there is no upper limit to it, although the most powerful recording is a 7
What is the VEI
hot springs often create these stepped rock formations as dissolved minerals settle and deposit
What are terraces?
this kind of volcano emits mostly cinders, ashes, and bombs
what is a cinder cone?
magma that reaches the earth's surface
what is lava?
thick layers of lava that cover millions of square miles are known as this
what are flood basalts?
According to the USGS, a volcano that has not erupted in historical times but is not significantly eroded is called a(n) _____________ volcano.
What is dormant?
secular geologists believe most of the earth's internal head comes from this
what is radioactive decay OR leftover from the earth's formation?
Young earth scientists would say that most, if not all, volcanoes were created and erupted at this period of time.
What is during or after the Flood?
What is the geothermal gradient?
Most of the world's volcanoes exist on the Circum-Pacific belt and this other place
What is the Alpine-Himalayan belt?
Young-earth scientists would say these kinds of volcanoes could be classified as active.
What are all of them? (all have been around since humans were)
this kind of energy from inside the earth can sometimes be harnessed for man's use
what is geothermal?
a streamlined mass of ejected lava that has solidified in flight
what is a bomb?