Question

earth history part 1
started: oct 16 at 6:32pm
quiz instructions
please watch the earth history part 1 homework narration in the homework tab before comple
question 6
what principles of steno are used to determine the relative age?
superposition
cross - cutting relationships
inclusions
all of the above

Explanation:

• Superposition: States that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and younger layers are on top. This helps in determining relative ages of rock layers.
• Cross - cutting relationships: If a geological feature (like a fault or an igneous intrusion) cuts through another feature, the cutting feature is younger than the feature it cuts. For example, if an igneous dike (B) cuts through rock layer (A), B is younger than A.
• Inclusions: If a rock (layer) contains fragments (inclusions) of another rock, the rock with inclusions is younger than the rock from which the inclusions were derived. Here, if layer C has inclusions from layer A (assuming appropriate geological context as per the principle), layer C is younger.

Since all these principles (superposition for layer - by - layer age determination, cross - cutting for features that disrupt existing rocks, and inclusions for age determination based on fragment origin) can be used in relative age dating in a geological cross - section like the one shown (where we can assume different rock units and features interact in ways these principles apply), all of them are relevant.

Answer:

All of the above