AnswersGeology Q1 - White - 3300 - 202627Relative Dating

Relative Dating Answers

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1
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In which situation is the principle of cross-cutting relationships useful in determining relative age?

A
A fault breaks through sedimentary layers.
B
Fossils of two different species are found in different rock layers.
C
Sedimentary layers form over millions of years in a lake bottom.
D
Lava flows form on top of one another from several eruptions over time.
2
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This diagram shows rock formations forming.

Question illustration
A
Formation 2 is an extrusion.
B
Formation 1 is an intrusion.
C
Formations 1 and 2 are faults.
D
Formations 1 and 2 are igneous rock.
3

The image shows sedimentary rock layers with index fossils and a fault.

Question illustration
A
Layer 8 is older than layer 1.
B
Layer 3 is younger than layer 6.
C
Layer 4 and layer 10 are the same relative age.
D
Layer 2 and layer 9 are the same relative age.
4

A geologist finds four layers of sedimentary rock. She determines that no geologic events have shifted the layers. She labels the layers A, B, C, and D from the top to the bottom.Which statement about these layers is accurate?

A
A is older than B.
B
B is older than C.
C
C is younger than A.
D
B is younger than D.
5

Which statement explains one reason why unconformities occur?

A
Rocks along a fault break and move.
B
Igneous rock forms at Earth’s surface.
C
No sediment is deposited over a long time.
D
Igneous rock forms between sedimentary layers.
6

A scientist finds a fossil that she thinks might make a good index fossil.Which characteristic does this fossil most likely have?

A
It is the remains of an organism still found alive today.
B
It is the remains of an organism that is found in abundance nearby.
C
It is the only fossil for this type of organism that has ever been found.
D
It is the remains of an organism that lived in a narrow geographic area.
8

The diagram shows horizontal rock layers.

Question illustration
A
Layer C is the oldest layer.
B
Layer B is younger than layer D.
C
Layer C is older than layer A.
D
Layer D is the youngest layer.
10

A geologist finds some tilted sedimentary rock layers.Which conclusion can the geologist draw by looking at the rock layers?

A
Their absolute age is 600 million years.
B
They were tilted before they were deposited.
C
They were originally deposited horizontally.
D
The youngest layer was originally deposited as the bottom layer.

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Relative Dating Answers — Geology Q1 - White …