At least we know one thing
The flaky-looking rock, Mimi, which Spirit analyzed last week, turns out to be nothing more than an "ordinary volcanic basalt".
http://www.newscientist.com/news/news.jsp?id=ns99994703
The flaky-looking rock, Mimi, which Spirit analyzed last week, turns out to be nothing more than an "ordinary volcanic basalt".
http://www.newscientist.com/news/news.jsp?id=ns99994703