Factors controlling growth of modern tufa: results of a field experiment - Tufas and Speleothems: Unravelling the Microbial and Physical Controls - page 158

Fig. 10. Calcified Vaucheria filaments: (a) cross section of a filament, December 2003; (b) cross-section of
filaments, June 2003; (c) living Vaucheria filament initially covered with calcite crystals, October 2003; (d) initial
crystals forming a filament, June 2003; (e) parallel orientation of filaments, June 2003; (f ) cross section through more
heavily encrusted filaments, L ´ˇky W point, tufa formed on Cu tablet exposed between August 2002 and October 2003;
all but (f) L ´ˇky top point, a, d - SEM images, lyophilized samples, b, c, e - thin sections, c - algological sample
under microscope.

stems were cemented to the air-facing surface of the
limestone tablet exposed throughout the whole time
of the experiment at the H ´ j upper waterfall point
(Fig. 16c). The stem represents Brachythecium ruta-
bulum (R. Ochyra, pers. comm., 2003). This species
of moss grows in the water running down the

waterfall and forms there, together with other
species, a 2 m long moss curtain. The stem was
covered by epiphytic diatoms and cyanobacteria
and was encrusted with calcium carbonate
(Fig. 16d). Cross sections of diatom stems were
also detected in the tufa growing on limestone