. Annual report. New York State Museum; Science; Science. ELIZABETHTOWN AND PORT HENRY QUADRANGLES 39 not uncommon and the gneiss often exhibits the " augen " produced from V777T77\ y/ss/// \/A"/' ATtoTtKoeite G-neiss Fig. 6 Inclusions of anorthosite in gabbio of the Split Rock Falls type. Ledges on Slide brook This intrusive is known to be later than the anorthosites because in the bare ledges along the cascades at Split Rock falls, inclusions of anorthosite are found in it. Each is surrounded by a garnet rim which appears to represent magmatic or corrosion pheno
. Annual report. New York State Museum; Science; Science. ELIZABETHTOWN AND PORT HENRY QUADRANGLES 39 not uncommon and the gneiss often exhibits the " augen " produced from V777T77\ y/ss/// \/A"/' ATtoTtKoeite G-neiss Fig. 6 Inclusions of anorthosite in gabbio of the Split Rock Falls type. Ledges on Slide brook This intrusive is known to be later than the anorthosites because in the bare ledges along the cascades at Split Rock falls, inclusions of anorthosite are found in it. Each is surrounded by a garnet rim which appears to represent magmatic or corrosion Woolen Mill locality. On the south side of the Branch a mile to the west of Elizabethtown and near the mill there is a very interesting rock which exhibits an irruptive contact with the anor- thosite and extends both westward and southward. It is dark, gneissoid and of moderate coarseness of grain. It resembles a rather basic member of the syenite series but has occasional blue labradorite phenocrysts which ally it with the anorthosites. Under the microscope and in slides from specimens without the labra- dorite phenocrysts, the minerals are, rather deep green pyroxene, sometimes showing faint pleochroism to yellow, plagioclase, ortho-. 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 New York State Museum. Albany : University of the State of New York
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