Photomicrograph of diallage crystal in gabbro, showing rims of brown hornblende along the contacts with feldspar. New London County, Connecticut. 1904.
Dates
Date Taken
1904
Summary
Photomicrograph of diallage crystal in gabbro, showing rims of brown hornblende along the contacts with feldspar. The black veinlet is limonite. Magnified 30 diameters. Without crossed nicols. New London County, Connecticut. 1904. Plate 9-A in U.S. Geological Survey. Bulletin 492. 1912.
Summary
Photomicrograph of diallage crystal in gabbro, showing rims of brown hornblende along the contacts with feldspar. The black veinlet is limonite. Magnified 30 diameters. Without crossed nicols. New London County, Connecticut. 1904. Plate 9-A in U.S. Geological Survey. Bulletin 492. 1912.
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