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. 2016 Feb 18;7:75. doi: 10.3389/fmicb.2016.00075

FIGURE 13.

FIGURE 13

Mat Mound, an extensive hydrothermal mound ca. 2.5 m high and several meters across. The scale bar corresponds to 10 cm. (A) Still photo from inside Alvin approaching Mat Mound from the east during Alvin dive 4483 (December 6, 2008). The photo shows the multiple pinnacles, extensive Riftia overgrowth, and downward sloping microbial mats growing on the hydrothermal flanks and surrounding sediments of Mat Mound. (B) The central pinnacle of Mat Mound in a framegrabber image from the subsequent dive. Alvin heading 285, depth 2002 m, GMT 21:45:18, dive 4484, December 7, 2008. (C) Extended slope of Mat Mound with Riftia colony higher up, and patchy white and orange Beggiatoa mats covering the lower slope and the sediment contact zone. Alvin heading 238, depth 2003 m, GMT 18:40:10, dive 4484, December 7, 2008. All photographs courtesy of the Woods Hole Oceanographic Institution, from RV Atlantis cruise AT 15-40.