Geology102:Quiz-Unit07

Which of the following is NOT one of the five principles of stratigraphy?

• Superposition

• Original horizontality

• Cross-cutting relationships

• Radioactive decay

Which of the following is a mechanism of radioactive decay?

• Stratigraphy

• Electron capture

• Superposition

• Original horizontality

How is carbon-14 used in dating recent events?

• It measures the numeric age of the Earth.

• It determines the sequence of geologic events.

• It helps date organic materials by measuring radioactive decay.

• It identifies isotopes in the atmosphere.

What is the study of layered sedimentary rocks called?

• Paleontology

• Stratigraphy

• Mineralogy

• Petrology

What does the Principle of Lateral Continuity state about strata?

• Strata are always vertical

• Strata are continuous in all directions until they thin out or hit a barrier

• Strata are always horizontal

• Strata are the oldest layers

What is a nonconformity in geological terms?

• A break or absence between parallel strata

• Sedimentary rock deposited on igneous or metamorphic rocks

• Horizontal strata deposited on tilted strata

• Erosion of sedimentary layers

In the context of the Grand Canyon, what does the term "strata" refer to?

• Layers of volcanic rock

• Layers of sedimentary rock

• Layers of metamorphic rock

• Layers of igneous rock

What is an isotope?

• A type of mineral grain

• An element with a different number of protons

• An element with a different number of neutrons

• A stable element

Which type of rock is best suited for radiometric dating?

• Sedimentary rocks

• Igneous rocks

• Metamorphic rocks

• Evaporites

Which element is used for dating geological events due to its radioactive properties?

• Uranium-238

• Thorium-234

• Potassium-40

• Lead-206