Geologic Time
Plate Tectonics
Volcanoes/EQ/Mountains
Minerals
Rocks
100
The rule of geology that states that the geologic processes that occur now, also occurred the same way in the past.
What is the law of Uniformitarianism?
100
Type of plate boundary in which both plates move away from one another.
What is a divergent boundary?
100
The largest type of volcano, which is very broad but not all that tall.
What is a shield volcano?
100
The Mohs scale measures this property of minerals.
What is hardness?
100
Rock type that forms when the original rock has been put under extreme heat and pressure.
What is metamorphic rock?
200
The longest category of geologic time.
What is eon?
200
Formed when dense oceanic crust descends beneath lighter continental crust at a convergent boundary.
What is a subduction zone?
200
Occurs when volcanic material mixes with water, creating a very hot, muddy flow.
What is a lahar?
200
Mineral property in which the mineral breaks in smooth planes.
What is cleavage?
200
Texture of metamorphic rocks where there are thin layers/bands.
What is foliation?
300
Igneous rocks or faults that cut into other rocks are the youngest.
What is the law of cross-cutting relationships?
300
This person came up with the theory of Continental Drift, due to the fact that continents appeared to "fit together" and had similar fossils.
Who is Alfred Wegener?
300
The fastest type of seismic wave released from an earthquake.
What is primary/P-wave?
300
Type of mineral that forms when water evaporates.
What are evaporates?
300
Texture where there are large crystals in the igneous rock.
What is porphyritic?
400
Index fossils, which are fossils that appear for a short period of time, help determine this of a rock.
What is relative age?
400
Process in the mantle that drives plate movement?
What is convection current?
400
Mountain type that is formed when land is uplifted. There is very little deformation.
What is uplifted mountain?
400
A mineral that light will pass through, but the image on the other side appears cloudy.
What is translucent?
400
The chain of volcanoes, known as the Ring of Fire, surrounds this location.
What is the Pacific Ocean?
500
Technique in which tree rings are used to determine the absolute age of an event.
What is dendrochronology?
500
New oceanic crust is formed at the mid-ocean ridge, which then gradually moves away from the ridge in this process.
What is seafloor spreading?
500
Megathrust earthquakes occur here, shifting the ground vertically an average of 100ft and creating tsunamis.
What is a subduction zone/convergent boundary?
500
Larger minerals form in igneous rocks through this process.
What is slow cooling?
500
Comprising most of the Earth's crust, this material makes lava more viscous.
What is silica?
M
e
n
u