Soap Lake is the last of a miles long chain of lakes draining this high
inter-montain landscape. Being the last Soap Lake has dissolved
in its waters a mixture of salts and minerals....
"The two-mile lake contains a primordial soup of salt, baking soda,
potassium, sulfate, nitrogen, fluoride, calcium, iron, copper, lithium
and titanium, all at such singular levels that scientists have studied
the lakebed to better understand what soil must be like on other planets."

http://archives.seattletimes.nwsource.com/cgi-bin/texis.cgi/web/vortex/
display ?slug=soaplake12&date=20040912&query=Seeking+miracles+in+the+minerals