On September 18,1870, the Washburn-Langford-Doane Expedition entered the Upper Geyser Basin, eventually members of the expedition named seven geysers they observed in the basin.
The Washburn-Langford-Doane Expedition entered the Upper Geyser Basin, eventually members of the expedition. This was on September 18,1870. This expedition was named seven geysers. They observed seven geysers in the basin.