National Geographic : 1971 Jul
Yawning crater of Upheaval Dome, encircled by a rampart of rock, sug gested a meteor impact to some geolo gists. But others found the explana tion in the earth far below. Vast salt Out of the sere desert springs a bright bounty. Mutually beneficial colonies of algae, fungi, mosses, and lichens form a rough dark crust that enriches and preserves the soil sup porting these ground-hugging daisies. Some lichens sustain algae that draw nitrogen from the air and deposit the much-needed element in the desert soil. Other algae secrete a substance that helps hold the soil together.