No real analysis here, but I’d like to draw your attention to this recent article by Kenneth Chang in the New York Times about recent work that might shed light on the very early earth. I am highlighting the article both because it deals with geochronology (U-Pb zircon geochronology to be exact), and because it is a rare article dealing explicitly with geology; not modern climate change or some geoscience themed hazard, but straight up geology. The article also has some good quotes from some of the grand high mucky mucks of geology including Mark Harrison, John Valley, and Norm Sleep. I’ve seen a talk version of some of this data before, and when I get into my office tomorrow I’ll check out the Nature paper as well and try to comment, although in all honesty I seriously doubt I’d come up with much more insightful than Professors Harrison, Valley, Sleep, and Mojzsis.
In consideration of self promotion, if you’d like some background on geochronology to help with the NY Times article, check out this earlier post of mine, or any of the background geology posts I have listed on my sidebar.
Apparent Dip 
Norm! I can just see him calculating something like the probability of life surviving the Hadean.I’m curious what equilibrium they used to calculate the pressures and temperatures. (I need to look at the Nature article, I guess.)
Finals for me next week man. Been a fun time dabbling in geology and reading your blog along the way. Certainly will never look at a rock formation the same again. I hope to jump back into it next semester with physical geology, but unfortunately I might be returning to work full time (gotta live, sadly!)Luckily, (given I ace this interview tomorrow) I’ll be working at the college campus and so even if I’m not enrolled, I may just sneak into geology classes… sneaky sneaky like đŸ˜€
: )
nice pics!
… well written people, I enjoy a good, interesting blog!