Vocabulary
Study of earthquakes
What is Seismology
Densest layer of Earth interior
What is the core
Surface location above the source of an earthquake
what is the epicenter
Large gentle slope volcanic edifice formed by mostly hot basaltic lava flows
What is a Shield Volcano ?
type of plate boundary called a constructive boundary
What is a divergent boundary ?
thickest layer of Earth interior
What is the Mantle
The layer of the Earth that ranges in pressure from 1.5 to 3 million atmospheres
What is the outer core?
Location within the crust where quake waves are first generated.
What is the focus or hypocenter
The volcanic edifice created mostly by pyroclastics
What is a Cinder Cone
The Adirondacks are this type of mountains
What is a dome?
Term referring to dark igneous lava composition
What is the Mafic or Basaltic
Discontinuity in seismic wave velocity indicating the bottom of the brittle crust of the Earth
What is the Moho
Instrument used to measure quake waves
What is a seismograph
Super volcanic eruptions have caused temporary global climate changes because of this
What is suspended ash in the atmosphere blocks sunlight ?
This type of fault is evidence of convergence
What is a Reverse or Thrust Fault
Process that eventually returns crustal material to the mantle.
What is subduction
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
origin time of a quake if lag time is 4:40 and P wave arrival time was 21:10:00
What is 21:04:00
This is a North American stratovolcano. It erupted last in 1980.
What is Mt St Helens
Name of man who first published the idea of Continental Drift
Who was Alfred Wegener?
An upward warped fold in rock layers
What is an Anticline
Two bits of evidence that the outer core is moving metallic material
Earthquake S waves cannot pass through it.
Earth has a magnetic field.
High Iron meteorites
difference in shaking energy of a Richter Magnitude 7 quake from a Magnitude 1
What is 1 million times more
The composition of lava that flows most slowly?
What is Rhyolitic or granitic or Aa lava
List three factors that affect volcanic eruption style
What are boundary type, magma composition, magma temperature, magma gas content?