Economic Geology
What two mining methods are used for Lithium mining?
Brine and Hard rock
How many feet in a mile?
5280
What type of acid is characteristic of acid mine drainage?
Sulfuric
List the three types of magma types from least viscous to most viscous.
Basaltic, andesitic, granitic
Name the three eras of the Phanerozoic Eon from oldest to youngest
Paleozoic, Mesozoic, Cenozoic
What is the primary ore of Titanium and what is its formula?
Ilmenite (FeTiO3)
What distance does 1cm on a map that has a scale of 1:100,000 represent?
1km
Define Hydraulic Conductivity
The property of a soil or rock that determines the relative ease or difficulty with which a fluid can be transported through it.
What is the most useful volcanic eruption precursor?
A series of small earth tremors that decrease in depth as magma is intruded upwards.
When were Trilobites around?
Cambrian-Permian
What is the elemental difference in formulas between Magnetite and Hematite?
Magnetite= Fe3O4
Hematite= Fe2O3
How do you calculate the area of a circle?
pi*r^2
Describe Transmissivity
The relative amount of water that can be transmitted horizontally in an aquifer to a pumping well or draw point.
What type of rock do granitic calderas tend to produce?
Ignimbrites
If you find a sandstone dated at 45 million years old, what epoch was it formed?
The Eocene
What mineral is the primary ore of Copper and what is its formula?
Chalcopyrite (CuFeS2)
On a 1:24,000 map 1in is equal to what?
2,000ft
What is the Theis equation used to determine and what 2 parameters of an aquifer are needed to perform this?
Transmissivity and Storativity
Drawdown and Time
What is the difference between a shield volcano and a cinder cone volcano?
Shield- Very wide and typically made of basalt/mafic rock
Cinder Cone- Steep and made of granite/felsic rock
Which index fossil indicates a depositional age between the Devonian and the Cretaceous?
Ammonoid
What is the only globally significant ore of aluminum?
Bauxite
How many milligrams in a liter?
1 million
What is the difference between true porosity and effective porosity?
True porosity is a measure of all existing void space, while effective porosity is a measure of all void space through which fluid can effectively travel.
Why is it unlikely Youd find an explosive volcano at a constructive plate margin?
The overlying water causes gas to escape slowly.
What are the 7 periods of the Paleozoic from oldest to youngest?
Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian