Mineralogy and Petrology

What is the Earth’s average geothermal gradient?

• 5 °C/km

• 25 °C/km

• 30 °C/km

• 50 °C/km

Which of the following minerals can be scratched by a copper coin?

• Orthoclase

• Calcite

• Corundum

• Diamond

What is the anorthite content of andesine?

• An 0-10

• An 50-70

• An 30-50

• An 70-90

What is the SiO2 abundance of dacite?

• 52 to 63%

• 45 to 52%

• 52 to 66%

• 63 to 66%

Which of the following contains gold?

• Greenockite

• Bornite

• Sylvanite

• Magnetite

Mid-Atlantic Ridge is composed mainly of ____.

• Alkalic basalt

• Calc-alkalic basalt

• Alkali-calcic basalt

• Tholeiitic basalt

It comprises all of the chemical, physical, and biological changes that a sediment undergoes during and after lithification in the near-surface environment.

• Lithification

• Catagenesis

• Mesogenesis

• Diagenesis

It is probably the most common cause of metamorphism.

• Temperature

• Pressure

• Metamorphic fluids

• Deviatoric stress

An opaque black, idiochromatic tourmaline species that has high magnetic susceptibilities due to high concentrations of iron.

• Elbaite

• Schorl

• Liddicoatite

• Biotite

A nickel-rich mineral present in meteorites.

• Kamacite

• Coprolite

• Taenite

• Enstatite