Not that I don't want to get all super-excited about martian conglomerates, but Erik Klemeti via twitter (@eruptionsblog) has a good point about alternate interpretations for those rocks.
Volcaniclastics (Tertiary, Utah)
Thursday, September 27, 2012
Wednesday, September 19, 2012
The day to talk like one...
Arrr, to-day is the day for keelhauling and shivering of timbers. So you may need one of these:
