Wednesday, February 29, 2012

Accretionary Wedge #43 -- two-day extension

Special this month only!!
AW#43 deadline has been extended until March 2.

Thanks to everyone for the really interesting and diverse posts!  I won’t get to the roundup until Saturday, so if you haven’t yet shared your favorite geological illustration, there is still time.  Submit via Comments at:
The good old days of Scientific Illustration.
“Devils Tower lies in a region of Triassic and Jurassic sedimentary strata.  In Fig. 1 the flat valley in the foreground is the Gypsum Spring formation (Triassic), and the cliffs in the middle distance are members of the Sundance Formation (Jurassic).  The tower itself is considered to be Tertiary on geological evidence.”  from Bassett, W. A.  1961.  Potassium-argon age of Devils Tower, Wyoming.  Science 134: 1373.

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