Midway Geyser Basin is much smaller than the other basins found alongside the Firehole River in Yellowstone National Park. Despite its small size, it contains two large features, the 200-by-300-foot-wide Excelsior Geyser which pours over 4,000 U.S. gallons per minute into the Firehole River. The largest hot spring in Yellowstone, the 370-foot-wide and 121-foot-deep Grand Prismatic Spring is also found there. Wikipedia
The Norris Geyser Basin is the hottest geyser basin in the Yellowstone National Parkand is located near the northwest edge of Yellowstone Caldera near Norris Junction and on the intersection of three major faults. The Norris-Mammoth Corridor is a fault that runs from Norris north through Mammoth to the Gardiner, Montana, area. The Hebgen Lake fault runs from northwest of West Yellowstone, Montana, to Norris. Norris Geyser Basin is so hot and dynamic because these two faults intersect with the ring fracture zone that resulted from the creation of the Yellowstone Caldera. The Basin consists of three main areas: Porcelain Basin, Back Basin, and One Hundred Springs Plain. The tallest active geyser in the world, Steamboat Geyser, is located in Norris Basin. Unlike the slightly smaller but much more famous Old Faithful Geyser located in Upper Geyser Basin, Steamboat has an erratic and lengthy timetable between major eruptions. Wikipedia
