Description
Samples KBR-1, KBR-2, and KBR-2A are from a vertical mass of gabbro showing progressive differentiation inward. This sample is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm. There is a red rusty looking weathered surface. This rock has an average specific gravity.
Thin section images are shown in plain and cross polarized light at40x magnification.
The gabbro is composed of 65% plagioclase, 30% pyroxene, 3% oIivine, and 2% opaques.