FIGURE 2.
Microbial mats in Lake Clifton, Western Australia. (A) Thrombolite-associated microbial mat with oxygen bubbles (inset box shows higher magnification) observed emanating from the mat surface. White arrow denotes lower left corner of inset box. (B) Thrombolite-associated microbial mat (white arrow) grades upward into a desiccated mat (black arrow) consistent in appearance with lithified thrombolites. (C) Sediment-associated microbial mat forming on sandy lakebed sediments. (D) Sediment-associated microbial mat with a strong sulfide smell observed during sampling. Length of blue ruler = 16 cm. Arrows are also representative of sampling locations.
