grand canyon national park\ndriving question: when did the rock layers form?\nput that practice to the test…

grand canyon national park\ndriving question: when did the rock layers form?\nput that practice to the test (dont worry, not an actual test)! answer the questions about the relative ages of the rocks layers at grand canyon national park.\n1. which number rock layer is the youngest layer?\ntype here\n2. what occurred between layers 2 & 3 (where the arrow is)?\ntype here\n3. is the process that occured between layers 2 & 3 a constructive or destructive force? explain your decision.\ntype here\n4. rock layer #1 is an igneous intrusion. which law of relative dating supports that layer #1 is younger than layer #2?\ntype here\nsubmit when completed

grand canyon national park\ndriving question: when did the rock layers form?\nput that practice to the test (dont worry, not an actual test)! answer the questions about the relative ages of the rocks layers at grand canyon national park.\n1. which number rock layer is the youngest layer?\ntype here\n2. what occurred between layers 2 & 3 (where the arrow is)?\ntype here\n3. is the process that occured between layers 2 & 3 a constructive or destructive force? explain your decision.\ntype here\n4. rock layer #1 is an igneous intrusion. which law of relative dating supports that layer #1 is younger than layer #2?\ntype here\nsubmit when completed

Answer

Brief Explanations:

  1. In geology, the principle of superposition states that in an undisturbed sequence of sedimentary rocks, the youngest layer is on top. So, the top - most numbered layer is the youngest.
  2. The arrow between layers 2 and 3 likely indicates an unconformity, which is a gap in the geologic record where rock layers have been eroded or not deposited for a length of time.
  3. Erosion, which is likely the process between layers 2 and 3, is a destructive force as it wears away rock material.
  4. The law of cross - cutting relationships states that an igneous intrusion is younger than the rock layers it cuts through. Since Layer #1 (igneous intrusion) cuts through Layer #2, it is younger.

Answer:

  1. 6
  2. An unconformity (likely due to erosion or non - deposition).
  3. Destructive force because erosion (assumed process) wears away rock.
  4. Law of cross - cutting relationships.