Sheeted dike complex of the 57 Ma Resurrection Peninsula Ophiolite, Alaska.

We recently determined the age of this complex by dating zircons in sediment interbedded in the overlying pillows. One of the most spectacular sheeted dike complexes I've seen (...and difficult to access).
These are feeders for basaltic magma to reach and erupt to the ocean floor.

#Alaska #Ophiolite #SheetedDikes #Paleocene #Chugach