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Holes made long ago by piddocks digging into sandstone

Kalaloch’s Beach 4 in Olympic National Park may not be cleverly named but it has wonderful patterns created long ago by piddocks digging into the sandstone. The ground underneath them was moving slowly, slowly even for shellfish, and now sits just above sea level, out of the reach of even the highest tides. Everything is relative, you’ll find much more ancient signs of ocean life high up in the mountains, as the older rock is pushed upwards by the shifting land below.

Piddocks are still around today, still digging into sandstone, you can read more about them at the Oregon Department of Fish & Wildlife’s piddock information page.