The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. The fault cuts through all three sedimentary rock layers (A, B, and C) and also the intrusion (D). So the fault must be the youngest feature.

What is the order of rock layers from oldest to youngest?

The law of superposition states that rock strata (layers) farthest from the ground surface are the oldest (formed first) and rock strata (layers) closest to the ground surface are the youngest (formed most recently).

What is the approximate age of fault H?

The analysis of a sample of rock from layer H Figure 10.12 (9th edition) or figure 9.12 (8th edition): indicates that its age is 400 million years.

What is the oldest layer shown?

The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A.

Which rock layer is probably the oldest?

bottom layer The bottom layer of rock forms first, which means it is oldest. Each layer above that is younger, and the top layer is youngest of all.

Which point indicates the oldest exposed layer?

Superposition. Sedimentary rocks are deposited one on top of another. Therefore, the youngest layers are found at the top, and the oldest layers are found at the bottom of the sequence.

Which Paleozoic layer is oldest?

layer C The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: Layer C formed.

Which rock layer is probably oldest?

Geologists use the law of superposition to determine the relative ages of sedimentary rock layers. According to the law of superposition, in horizontal sedimentary rock layers the oldest layer is at the bottom. Each higher layer is younger than the layers below it.