It was immediately apparent that we were looking at columnar jointing in basalt. Lockwood or Dana Hunter, my Pacific Northwestern geoblogging friends, can probably say a lot more about the geology (think of them as being the clerks in the candy shop, the ones who get to see this stuff a lot more often), but what little I can find in a cursory search is that these outcrops are part of a sill, an intrusion that squeezed between sedimentary layers about 14 million years ago.
Elephant rock is the largest chunk of basalt but others form a wall of sorts along the shoreline.
|Cool columnar jointing, or the Gates of Mordor??|