Answer :
Final answer:
Explains the 5 terranes representing a volcanic arc within the Blues terrane with clear descriptions of their locations in the arc.
Explanation:
The Blues terrane is made up of 5 terranes that represent a volcanic arc.
A volcanic arc is a chain of volcanoes formed above a subducting plate in a curved line along a tectonic plate boundary. The terranes within the Blues terrane represent different parts of this volcanic arc:
- Oldsferry/Wallowa terrane: Represents the part of the arc that is landward of the trench.
- Grindstone terrane: Represents the part of the arc that is volcanic in nature.
- Izee Terrane: Represents the part of the arc that is associated with ancient ocean floor deposits.
- Baker Terrane: Represents attached fragments within the island arc.
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