Florida spring

St Marks Sulfur Spring 3

A small sulfur-vent spring situated in the floodplain of the river. The vent is approximately 0.5 meters wide and 1 meters deep, surrounded by a shallow pool often only 0.2 meters deep, so the underwater features are modest. The spring emits a strong sulfur odor and supports white sulfur-bacterial mats on the vegetation and banks. The discharge flows via a short spring run (~100 meters) to the main river.