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Geo
GeoPRISMS PHOTO CONTEST 2017
PRISMS

WINNER

GeoPRISMS Photo Contest

Congratulations to Gene Yogodzinski

winner of the GeoPRISMS Photo Contest
at the 2017 AGU Fall Meeting

Gene took this photo during a field campaign
conducted on Unalaska Island in the Eastern
Aleutians. Pillow lavas can be observed in the
lower part of the outcrops behind Gene’s colleague
Merry Cai (Lamont) who provides the scale for the
photo. The mottled appearance is produced by
the reddish-brown pillow interiors, surrounded by
green, inter-pillow sediment and altered pillow rinds.
The upper part of the outcrop is an andesite sill
with short, columnar joints at 90° to the horizontal
contact. These rocks were formed prior to effects of
crustal thickening by magmatism and accretionary
tectonics, which eventually led to the emergence of
the large islands that we see in the eastern Aleutians
today. Gene received a framed copy of his photo.
Visit the contest page at geoprisms.org to see all the
photographs from this year.

Spring 2018 Issue No. 40 GeoPRISMS Newsletter • 5