Summary[edit] Description: The orange and brown color at the edge are due to the cyanobacteria Phormidium, Synechococcus, and Calothrix. Grand Prismatic Spring Midway Geyser Basin Yellowstone National Park sw16 113. Date: 20 June 2016, 17:24. Source: Grand Prismatic Spring. Author: brewbooks from near Seattle, USA. Camera location44° 31′ 32.13″ N, 110° 50′ 16.25″ WView all coordinates using: OpenStreetMap 44.525591; -110.837847.