This website and all materials herein are based upon work supported by the National Science Foundation, under Grant No. 0206711. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Principal Investigators: Dr. Ferran Garcia-Pichel (ASU), Dr. Jean Schmidt (ASU),

and Dr. Richard Keller (NASA Ames Research Center)

Please contact us directly to request any of these materials if you are interested.

Region	State	No. of localities	No. samples
Chihuahuan desert	Arizona and New Mexico	16	236
Colorado Plateau	Utah	9	160
Northern Great Basin	Oregon and Nevada	12	99
Sonoran desert	Arizona	14	278
Mojave desert	Arizona, Nevada, California	4	93
	TOTAL	55	866