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09-Feb-2017 23:39

We will learn more about this method of identifying rock units and geologic time periods in next week's lab.Question 5: On the South Half, approximately how high is Hopi Point on the Coconino Plateau? Use the letter labels to refer to the distinct rock layers.In the same way, such a transect could also show the inferred profile of the geology underfoot -- the expected rock layers and structures beneath the land from the northwest corner to the southeast corner of the map. You can open a larger version of this diagram by clicking on it.

These are the dark lines that slice through the rock formations.

The various sedimentary layers are labeled as B, E, K and W.

The timing of the fault (break) in the rocks (labeled as Q) must be included in the sequence of events.

Just as Sherlock Holmes used his power of observation to decipher the clues to a suspect's past actions, we will let the blemishes and behaviors of the rocks tell us their past story. ) Remember that relative dating involves determining "which came first" rather than "exactly when did this happen." The first step to untangling the geologic history of an area is often to figure out what happened first, second and third, etc.

without knowing the absolute ages at which the rocks themselves formed.

These are the dark lines that slice through the rock formations.The various sedimentary layers are labeled as B, E, K and W.The timing of the fault (break) in the rocks (labeled as Q) must be included in the sequence of events.Just as Sherlock Holmes used his power of observation to decipher the clues to a suspect's past actions, we will let the blemishes and behaviors of the rocks tell us their past story. ) Remember that relative dating involves determining "which came first" rather than "exactly when did this happen." The first step to untangling the geologic history of an area is often to figure out what happened first, second and third, etc.without knowing the absolute ages at which the rocks themselves formed.Also an igneous intrusion is present (labeled T) and a fault is present (labeled A).