About the Cover
Pegmatitic-granitic dykes merging and diverging as they intrude calc-silicate rocks within the Karakoram Shear Zone, in Ladakh, NW India. Photo by R.F. Weinberg. The magmas were generated by partial melting at ca. 17-15 Ma, of a sequence of biotite and hornblende rich metasedimentary rocks that crop out in the region, such as those documented in the related article by Weinberg and Mark (v. 120, no. 7/8, p. 994-1009). The magmas were then expelled from their source and intruded the calcsilicate package.
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