Image, Stock Photo Close up of circled pattern formed by clams while some tiny beach pebbles occupy some of the holes in Olympic National Park in Washington coast

Close up of circled pattern formed by clams while some tiny beach pebbles occupy some of the holes in Olympic National Park in Washington coast circle hole geology clam pebble tiny beach washington park pattern nature circled shape figure top view from above high angle brown empty black coast natural formation outdoor irregular stone texture hard detail rough olympic national park geologic old round form occupy summer full material surface