Unconformities in Rock

Click on the circle for the angular unconformity.

Tags

NGSS.MS-ESS1-4

Click on the circle for the disconformity.

Tags

NGSS.MS-ESS1-4

Scientific study of rock layers

• Archeology

• Stratigraphy

• Paleontology

• Geology

Tags

NGSS.MS-ESS1-4

Gaps in rock layers.

• Angular Unconformities

• Cross-Cutting

• Unconformities

• Inclusions

Tags

NGSS.MS-ESS1-4

This is a surface where the rock has eroded away, producing a break, or gap, in the rock record.

• unfonformity

• inconsistancy

• uniformity

• correlation

Tags

NGSS.MS-ESS1-4

What is an unconformity in geology?

• A surface of erosion or non-deposition separating younger strata from older rocks

• A type of rock formation found only in sedimentary layers

• A mineral deposit found in igneous rocks

• A type of fossil found in metamorphic rocks

Which type of unconformity occurs when sedimentary rock layers are deposited on top of tilted or folded layers?

• Angular unconformity

• Disconformity

• Nonconformity

• Paraconformity

Tags

NGSS.MS-ESS1-4

What does a nonconformity represent in the geological record?

• A gap where sedimentary rocks lie above eroded igneous or metamorphic rocks

• A continuous sequence of sedimentary rock layers

• A fault line between two tectonic plates

• A volcanic eruption layer within sedimentary rocks

Tags

NGSS.MS-ESS1-4

Which of the following best describes a disconformity?

• A gap in the rock record between parallel layers of sedimentary rock

• A gap between igneous and sedimentary rock layers

• A gap caused by a fault line

• A gap between metamorphic and sedimentary rock layers

Tags

NGSS.MS-ESS1-4

How can unconformities be identified in the field?

• By observing missing layers in the stratigraphic sequence

• By finding fossils in the rock layers

• By measuring the thickness of rock layers

• By identifying mineral composition

Tags

NGSS.MS-ESS1-4