Plate P3. Photomicrographs of plagioclase + diopside and plagioclase + amphibole veins in Hole 735B. 1.Fine-grained felsic vein with a band of green diopside along the center. Large light brown grain and smaller reddish grain are titanite. Matrix of the d

Plate P3. 4. Same vein as in 3 with crossed polars. This view shows the granular nature of the plagioclase (Sample 176-735B-192R-6, 46-51 cm.). All scale bars = 1 mm.