blue dragonfly on bacterial mat, yellowstone national park

activity algae background bacterial basin blue boiling bug bumpy calcium caldera carbonate cat country crystallized dragonfly earthquake fault formation geothermal geyser grand grass green guyser hot insect lava leaf limestone mammoth mat midway mineral minerva national nature norris orange park plant pool prismatic red reeds river rock scenery season spring springs steam stem summer superheated surface tails texture textured travertine vacation vent volcanic water yellow yellowstone