Question

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

A fault breaks through sedimentary layers.
Fossils of two different species are found in different rock layers.
Sedimentary layers form over millions of years in a lake bottom.
Lava flows form on top of one another from several eruptions over time.

Answer 1

Answer:

correct answer is:

A fault breaks through sedimentary layers.

Explanation:

Formation of an intrusion in the earth's surface and igneous rock that forms between sedimentary layers are examples of situations where the principle of cross cutting relationships is useful in determining relative age.

Answer 2

In which situation is the principle of cross-cutting relationships useful in determining relative age (a) A fault breaks through sedimentary layers.

Explanation:

• In fault in geology a planar or gently curved fracture in the rocks of earth's crust where compressional or tensional forces cause relative displacement of the rocks on the opposite sides of the fracture.
• Sedimentary rock erosion and weathering include the effects of wind and rain which slowly break down large rocks into smaller ones.
• An unconformity is a buried erosional or non depositional surface separating two rock masses or strata of different ages indicating that sediment deposition was not continuous.
• Layering or bedding is the most obvious feature of sedimentary rocks.
• Sedimentary rocks are formed particle by particle and bed by bed and the layers are piled one on top of the other.