Rock Types/Classification
Forms from cooling of Magma or Lava, contains grains and crystals
What is Igneous?
What happens to an igneous rock to make it metamorphic?
What is Heat and Pressure?
German meterologist whom discovered the outline of the continents looked like puzzle pieces
Who is Alfred Wegener?
This type of boundary occurs when two tectonic plates move toward each other.
What is a convergent boundary?
US geologist that discovered the mid ocean ridges?
Harry Hess
Forms from compaction and cementation of sediment
What is Sedimentary?
When sediment from other rock becomes sedimentary rock
What is compaction and or cememtation?
Question that the scientific community aka "The Fixist" had for Wegener/reason for doubting his claim
What is the mechanism of continental movement
This is the layer of the Earth that is composed of molten rock and sits directly beneath the Earth's crust.
What is the mantle?
Located in the pacific, this is the deepest ocean trench on Earth
What is the Mariana Trench
Forms from Heat and Pressure from the mantle and weight of rock above
What is Metamorphic?
Igneous rocks form from this process
What is cooling of magma/lava?
Piece of evidences that supported continental movemement from the equator to places that are now polar
What is tropical plant fossils (glossopteris) on Antarctica
This geological feature forms when two oceanic plates diverge at a mid-ocean ridge.
What is a rift or a mid-ocean ridge?
When plate/old crust gets pushed back into the mantle to be recycled into new rock
What is Subduction?
Can contain fossils
What is sedimentary?
Process of breaking down all rock types to smaller pieces of sediment
What is Weathering and Erosion
Piece of evidence that suggested continents were connected and life roamed all over
What is fossils on now distant continents?
The movement of these plates is responsible for the formation of mountains, earthquakes, and volcanic activity.
What are tectonic plates?
Type of evidence that reveals that older rock is further away from the ridge
What is age of rock (youngest is closer to ridge, oldest is further)
A more dense rock that can have foliated 'waves' or bands and occasionally crystals
What is metamorphic?
When rock becomes subducted into the mantle
What is melting?
Piece of Evidence that suggested that Africa was once frozen, and not as close to the equator
What is glaciers?
These types of plate boundaries occur when two tectonic plates slide past each other horizontally.
What is a transform boundary?
Two additional pieces of evidence of seafloor spreading
what is: magnetic rocks with alternating patterns and varying temperature of rocks (hottest nearest ridge)