GSA Today
Volume 27, Number 7 (July 2017)
About the cover:
Mount Holyoke College astronomy students field-testing a Raman BRAVO spectrometer for field mineral identification, examining pegmatite minerals crosscutting a slightly foliated hornblende quartz monzodiorite and narrow aplite dikes exposed in the spillway
of the Quabbin Reservoir. All three units are part of the Devonian Belchertown igneous complex in central Massachusetts, USA.
See related article, p. 4–9.
© The Geological Society of America, Inc.