Relative Age & Correlation

Which sequence of geologic events occurred after the formation of the Cambrian limestone and before the formation of the Silurian limestone?

• uplift → weathering → erosion → subsidence

• uplift → subsidence → erosion → weathering

• subsidence → weathering → erosion → uplift

• subsidence → erosion → uplift → weathering

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

Which rock layer is the youngest?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

The photograph below shows an outcrop with two basaltic intrusions, labeled A and B, in a rock unit, labeled C. What is the relative age of these three rock units from oldest to youngest?

• B → A → C

• B → C → A

• C → A → B

• C → B → A

Tags

NGSS.MS-ESS1-4

Letters W, X, Y, and Z represent fossils found in the rock layers. Which fossil could best be used as an index fossil?

• W

• X

• Y

• Z

Tags

NGSS.MS-LS4-1

Which principle states that these sedimentary rock layers were originally deposited as horizontal sediment layers?

• Superposition

• Original Horizontality

• Cross-cutting

• Contact Metamorphism

Which principle states that the oldest sedimentary layers are deposited first, and should be found closest to the bottom?

• Superposition

• Original Horizontality

• Cross-cutting

• Contact Metamorphism

Tags

NGSS.MS-ESS1-4

When did faulting along line XY occur?

• after the intrusion of rock unit A

• after the deposition of rock units B, C, and D

• after the formation of rock units E and F

• before the formation of rock units G and H

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

When did intrusion A occur?

• after the formation of fault X-Y

• after the deposition of rock units B, C, and D

• before the formation of rock units E and F

• before the formation of rock units G and H

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

If the granite intrusion occurred 56 million years ago, what are the most probable ages of the schist and shale, in millions of years?

• schist – 57; shale – 55

• schist – 57; shale – 58

• schist – 55; shale – 57

• schist – 55; shale – 52

Tags

NGSS.MS-ESS1-4

The rock that formed in the contact metamorphic zone between rock unit E and rock unit F is

• quartzite

• marble

• slate

• schist