Earthquakes
What is p or primary wave?
This type of roughly broken and sharply-edged hardened lava is aptly named. It sounds just like what you would say if you walked across it barefoot.
What is a'a?
These three periods make up the Mesozoic era.
What are the Triassic, Jurassic, and Cretaceous?
This geologic wonder of the world, a national park in Arizona, is a great example of the relative dating principle of superposition.
What is the Grand Canyon?
This tectonic plate boundary has two plates moving away from one another.
What is divergent?
This type of earthquake seismic wave causes the most damage.
What are surface waves?
This dividing "line" separates magma and lava.
What is the surface of the Earth?
This period came after the Ordovician and before the Devonian.
What is the Silurian period?
This relative dating principle deals with an intrusion of rock cutting across another layer or layers of rock being younger than the rock(s) it cuts across.
What is cross-cutting?
This is a description of the movement at a transform boundary.
What is sliding past one another?
This earthquake measuring scale relates to the strength or magnitude of an earthquake.
What is the Richter scale?
What is a shield volcano?
These are the smallest "pieces" of time on the geologic time scale.
What are epochs or ages?
This principle of relative dating relates to a rock or rocks found within another rock layer being older than the rock(s) that contain or surround it.
What are inclusions?
What are oceanic and continental?
What is the Mercalli scale?
Mount St. Helens is this type of volcano.
What is composite or stratovolcano?
What are eons?
This relative dating principle deals with older materials being toward the bottom and younger materials being toward the top.
What is superposition?
This term describes the process of one type of tectonic plate going (or being pushed) below another type of tectonic plate.
What is subduction?
What is 2?
This is a very dangerous volcanic hazard involving rapidly moving super-heated clouds of gas and ash down the slope of a volcano.
This eon came before the Archean eon.
What is the Hadean eon?
Granite found inside basalt would be an example of this relative dating principle.
What are inclusions?
What are convergent, divergent, and transform?