Wednesday, January 10, 2007
Still back in December. A small stream mouth on a beach within view of downtown Seattle. In view, that is, if you have an office in the northwest corner on the 50th floor and you have a good telescope - I guess the rest of us have to go to the Space Needle and imagine the details. The topography suggests what may have once been a small estuary, although much of it is now occupied by a parking lot and the road.
The beach here is partly a small delta and partly just a slow spot in the beach. There is a little bit of a bay in the shoreline here, so the flux of northbound sediment may decrease, causing the beach to build up...sort of like traffic approaching the ship canal bridge on southbound I-5.
Much of the sand on this beach can probably be traced to some very large landslides a couple miles south of here that were active in the late 1990s.