12/27 Took 20d deviation of 1.1 mi, Ends w. new fence across Rd # in what must have been mustering ld. std w. 36-65°. Short walk to beach, H2O must have been c. 1/4 mi from strand line or more. Flat living mat of blister type. New living cauliflower type. .1 mile in - 2 brackish H2O ponds v. salty H2O cut off fr sea v. highest tide would fill channel. 1 pond reddish stromat- algae growing in blister habit at end. Other pond has red-grn band (Galliumella ?) of lactaria on edge with center v. black. Black smells - sulfur. Sulfate reducing.. 2nd Deviation rd. ends n fence + sea rd. beyond which turns out to be main, Flag Pile Landing - Hamlin Rd. Took pictures. Collected 1 sm cauliflower stromat. v. cauliflower area long blister ave mat EB-45. Shells + opal sponges collected at 2 brackish holes where estuary located E 15-46 stromatolite