Cinnamon Butte is one of a group of 3 young cinder cones long a WNW-ESE line immediately west of the Cascade crest and NE of Diamond Lake in Oregon, USA. The other two cones are Thirsty Point and Kelsay Point.
Divergent plate boundaries in oceans: Two ocean plates move apart from each other. Hot upwelling mantle material forms magmas that continuously produce new oceanic crust. An ocean widens.
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