False 1623-297 Haizahnhöhle 1623 297 2012-dd-08 1623-297 CUCC, (Duncan Collis and Anthony Day, 2012-08-10; Chris Densham, Frank Tully, Anthony Day, Todd Rye 2018-07-11) 5m diameter phreatic tube opens out after 20 m. Three low passages on left interconnect and choke. Up slope to right leads to narrow descending rift. Opens out at bottom into phreas but ckokes directly ahead. Draft reported in 2012. Name relates to shark-tooth-like popcorn formations. 1623/297/297.html