Tuesday, June 03, 2008
If you are going to bury a beach under big rock, it makes sense to do it right. In southern Ontario, limestone (dolostone, actually) is plentiful and has the strength and the blocky fabric to make great stackable armor stone. In Puget Sound, we are cursed with an abundance of crumbly marine basalt and our shorelines are the worse for it.
I loved the way the gravel was piled up against the seawall. Coarser sediment tends to do this, even when finer stuff is getting pulled offshore. The flat pebbles are probably made of the same basic stuff as the seawall. I bet the late fall storm waves toss it over the seawall (winter storms just blow across the ice).