Figure 1
From: Microbial and diagenetic steps leading to the mineralisation of Great Salt Lake microbialites
Microbial activity in lithifying mats of GSL.
(A) Representative O2 depth profiles of the top of the mat (red rectangle in hand sample image insert), measured in daylight (red and orange curves) and during the night (light and dark blue curves). The peak of O2 production indicates oxygenic photosynthesis is maximum at ca. 1.5 mm (B). Distribution of sulfate reduction determined on the identical sample as used for the oxygen profiles (panel A). Red, orange and yellow squares correspond respectively to high, medium and low sulfate reduction rates. (C) Representative O2, pH and HS− depth profiles during day (left) and night (right). See text for detail.
