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The cover: A 2-mm field of view showing radiating columnar and needlelike crystals of calcic clinoamphibole in a thin section by polarized light microscopy. This mineral, tremolite, is an example of an accessory calcium bearing mineral in serpentinite parent material that contributes to variability in the total and extractable Ca/Mg of soils on serpentinite landscapes. Please see pages 838–847, "Tectonic Inclusions in Serpentinite Landscapes Contribute Plant Nutrient Calcium" by Donald G. McGahan, Randal J. Southard, and Victor P. Claassen.