The diagram above shows several rock layers and other geologic features. Each feature is labeled with a unique letter. The order of the letters do not necessarily reflect the order in which the features formed. Examine the diagram, and answer the question that follows. Using the principles of original horizontality, superposition, and cross-cutting relationships, determine which of the following features is the youngest.

Question

(1 point)
Responses

N
N

G
G

R
R

H

Answer 1

To determine which feature is the youngest among the ones labeled N, G, R, and H using the principles of original horizontality, superposition, and cross-cutting relationships:

1. Original Horizontality: Layers of sediment are deposited horizontally. Any tilted or folded layers were altered after they were deposited.

2. Superposition: In an undeformed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest are at the top.

3. Cross-Cutting Relationships: If one geological feature cuts across another, the feature that is cut is older than the feature doing the cutting.

To identify the youngest feature, look for:

• Features that are at the top of the sequence in stratigraphic order.
• Any features that cut through others, indicating they formed later.

Without seeing the diagram, we cannot definitively answer which letter corresponds to the youngest feature, but you can apply the above principles to analyze the labeled features. Evaluate which feature is either on top of the sequence or cutting through another feature to determine which one is the youngest.

Answer 2

So which one
N
N

G
G

R
R

H

Answer 3

Since I cannot see the diagram you are referring to, I cannot directly identify which feature (N, G, R, or H) is the youngest. However, you can apply the principles of geology that I mentioned:

1. Check the order of the layers: The one at the top is usually the youngest if the layers have not been disturbed.
2. Look for any cross-cutting features: If one feature cuts through another, the one doing the cutting is younger.

Examine the diagram closely using these principles, and you should be able to determine which of the features (N, G, R, or H) is the youngest geological feature. If you can describe the relationships between these features in the diagram, I can help you deduce which one is the youngest.