"Jarosite is a secondary mineral that forms through weathering in arid regions, and is uncommon. It is found in the Jaroso Ravine in Sierra Almagrera, Spain, for which it was named after. It also occurs in Caldbeck Fells, Cumbria, England; the Clara mine in the Black Forest of Germany; Burra Burra, South Australia; the Los Bayos mine, Sierra Gordo, Chile; and Huanani, Bolivia.
In the U.S., lustrous crystals associated with Hematite were found in the Iron Arrow Mine in Chaffee Co., Colorado. It was also found as thin hexagonal scales in the Shattuck-Arizona Mine in Bisbee, Cochise Co., Arizona. Other localities are the Vulture Mine, Maricopa Co., Arizona; the Tintic District, Juab Co., Utah; Cherry Creek, Mackay district, Custer Co., Idaho; and the Champion mine in Mono Co., California."
Jarosite is associated with Hematite and it seems this whole region was/is a hot springs environment.
Space/Science » in reply to About Jarosite
re: Explains presence of Hermatite
The whole thread (40 posts)
- "liquid water once drenched the surface" (Opportunity site). WOW! LIVENASATV news announcements on now folks. (n/t)
- A virtual toast with my bottle of Perrier :-)
- re: Samples
- We should be careful that the evidence so far is conclusive of ground water not surface water
- About Jarosite
- If It Looks Like A Duckand and Wobbles Like A Duck
- When Squyres said; Opportunity's landing was a hole in one, he wasn't kidding. Cheers to this outstanding MER mission (n/t)
- Thank God for the internet connection to NASA TV
- You beat me to it.... (n/t)