. Bulletin of the Geological Society of America. Geology. BULL. GEOL. SOC. AM. VOL. 16, 1904, PL. 57. Figure2.—The Same with Crossed NlCOLB. X 61 PHOTOMICROGRAPHS OF HYPERSTH ENE-GABBRO Wayne, Delaware County, Pennsylvania. Photographed by F. J. Keeley. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York : The Society]

---

Size: 1106px × 2258px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890