Trevor noah springboks

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 1/41

Homework 5 Geologic Time Due: 11:59pm on Sunday, February 28, 2016

You will receive no credit for items you complete after the assignment is due. Grading Policy

Interactive Animation: Relative Geologic Dating

When you have finished, answer the questions.

Part A

Which of the following statements about relative and absolute age dating is most accurate?

ANSWER:

Correct

Part B

What is the principle of original horizontality?

ANSWER:

Relative age dating places rocks and events in chronological order and can provide information about absolute age.

Relative age dating provides information about absolute ages but does not place rocks and events in chronological order.

Relative age dating places rocks and events in chronological order but does not provide information about absolute age.

Relative age dating does not provide information about absolute ages, nor does it place rocks and events in chronological order.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 2/41

Correct

Part C

What is the principle of superposition?

ANSWER:

Correct

Part D

What is the principle of cross­cutting relationships?

ANSWER:

Correct

Part E

Five layers of rock are cut by two faults. Both faults cut through all five layers of rock. Fault A breaks through to the surface, whereas fault B does not. Which of the following statements about faults A and B is most accurate?

Metamorphic rocks are close to horizontal when deposited.

Sedimentary rocks are close to horizontal when deposited.

Sedimentary rocks are close to horizontal when eroded.

Metamorphic rocks are close to horizontal when eroded.

Within a sequence of rock layers formed at Earth's surface, rock layers in the middle of a sequence are older.

Within a sequence of rock layers formed at Earth's surface, rock layers higher in the sequence are older.

Within a sequence of rock layers formed at Earth's surface, rock layers lower in the sequence are older.

Geologic features that cut through rocks must form at roughly the same time as the rocks that they cut through.

Geologic features that cut through rocks must form before the rocks that they cut through.

Geologic features that cut through rocks must form after the rocks that they cut through.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 3/41

ANSWER:

Correct

Part F

Which principle of relative age dating is important for determining the relative age of igneous rock that has intruded into overlying rock?

ANSWER:

Correct

Part G

A fault (F) breaks three layers of sedimentary rock (S). An igneous intrusion (I1) has broken through the bottommost layer of rock. A second igneous intrusion (I2) has moved up the fault and pooled on top of the uppermost layer of rock. Which event would be considered the youngest?

ANSWER:

Correct

Faults A and B are about the same age, and both are older than the five layers of rock.

Fault A is younger than fault B, and both are older than the five layers of rock.

Faults A and B are about the same age, and both are younger than the five layers of rock.

Fault A is younger than fault B, and both are younger than the five layers of rock.

the principle of original horizontality