lowviz_dsc0890for-web_jpg Published February 23, 2015 at 600 × 392 in lowviz_dsc0890for-web_jpg Low visibility–dimmed by the density of the particulates suspended in the water column–add to the mystery. (Photo by Laurie Penland) Low visibility–dimmed by the density of the particulates suspended in the water column–add to the mystery. (Photo by Laurie Penland)