Typical surface view of purple mat surface at Middle Island showing purple filaments. Some white filaments can also be observed.

Typical surface view of purple mat surface at Middle Island showing purple filaments. Some white filaments can also be observed. Image courtesy of Thunder Bay Sinkholes 2008.

 

Related Links

Thunder Bay Sinkholes 2008

Thunder Bay Sinkholes 2008: Sept 4 Log

NOAA Ocean Explorer Gallery