The Baker Beach Rocks
4 - Melange boulder at base of cliff

This rock at the base of the cliff, just west of where the trail reaches the beach is highly representative of how mixed up this sequence of rocks actually is.  Here the pink rock on the right of the boulder is chert, the green in the center is volcanic material and the black on the left is shale.  All mushed together, rather like one of those buildings that has been demolished by implosion and the walls, floors and plumbing are all lying there as a massive pile of rubble.  The collision of the old sea floor and the North American continent caused a lot of disruption of these rocks.  Rocks that have this character are what geologists call melange and we will be observing some of the characteristics of this type of rock association.
More on melange
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