Q1) Which geologic feature is oldest out of the choices below? Select one: a. Ro

Question

Q1) Which geologic feature is oldest out of the choices below?

Select one:

a. Rock unit I

b. Rock unit L

Q2) Which principle/law is needed to correctly answer Question 1?

Select one:

a. Cross-cutting

b. Superposition

c. Lateral continuity

d. Inclusions

Q3) Which geologic feature is youngest out of the choices below?

Select one:

a. Rock unit G

b. Rock unit C

Q4) Which principle/law is needed to correctly answer Question 3?

Select one:

a. Cross-cutting

b. Superposition

c. Lateral continuity

d. Inclusions

Explanation / Answer

1. Rock unit L is oldest because in rock unit I( granite) , inclusions of rock unit L (gneisses) is found. Since inclusions are always older than than the rock surrounds them

2. Inclusion law has been applied in answering the above question because inclusions of rock unit L is found in rock unit I which confirms that rock unit L is older than rock unit I because inclusions are always older than the surrounding rocks.

3. Rock unit C is youngest according to the principal of superposition which states that in an undeformed sequence or rock unit laid horizontally the rock unit which is above is younger than which is below it.

4. The principal of superposition has been applied to answer the above question. The law of superposition states that in an undeformed sequence the rock unit which is above is younger than which is below.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.