A Geoscience Digital Image Library

TitleThin section of hornblende syenite
DescriptionThis is a cross polarized view of hornblende syenite. Texture is anhedral granular with considerable grain size variation. Slightly sericitized sodic plag and orthoclase are the feldspars. A few small grains of quartz are present. Biotite, the more abundant mafic, contains numerous magnetite inclusions. Hornblende, mottled brown with some green, includes magnetite and apatite. Sphene and pyrite (cheifly included in large magnetites) are the other accessories.
ChronostratigraphyLate Permian to Middle Triassic
Geologic provinceWhite Mountain Series
LocationUSA ▹ Vermont ▹ Rutland. Near Cuttingsville.
PhotographerDarla Sondrol. 2002-04-02.
CollectionWard’s Collection of Classic North American Rocks #13.
Key wordshornblende syenite, hornblende, syenite, Vermont
Tech details563 KB. Thin section. Nikon FDX-35.
GeoDIL number2554