Browse Items (1651 total)

A silty-shale where the clasts are dominated by quartz. Sample collected from an area typified by interbedded limestones and shale.

Both thin section images were taken at a 400x magnification.

Limestone containing fossils of the alga, Girvanella.

Both thin section images were taken at a 400x magnification.

Red siltstone lithology of the Bright Angel Shale.

Both thin section images were taken at a 400x magnification.

Green clay lithology of the Bright Angel Shale.

Both thin section images were taken at a 400x magnification.

Mottled lithology of the Muav Limestone.

Both thin section images were taken at a 400x magnification.

Sandstone shows metamorphic overprinting with triple junctions between quartz grains common.

Both thin section images were taken at a 400x magnification.

This sample is mis-labeled as a pegmatite. It is really a porphyritic dike material that cuts through the Zoroaster Granite. The phenocrysts are hornblende.

Part of the The Granite Gorge Metamorphic Suite, this is usually considered a metavolcanic, and its mineralogy is dominated by quartz and mica.

Both thin section images were taken at a 400x magnification.

Both cross polarized and plain polarized images were taken at a 400x magnification.

Both thin section images were taken at a 400x magnification.

1 inch = 500 kilometers
includes major tectonic plates as well as landmasses

"plate 2" is a geologic map of new york state, "plate 4" is a description of the map along with other geological information about the state

1:1000000
"plate 1" is a satellite shot of new york state, "plate 3" (the reverse) is a legend for the geologic on accompanying map

1 inch = 500 kilometers
includes major tectonic plates as well as landmasses

"plate 2" is a geologic map of new york state, "plate 4" is a description of the map along with other geological information about the state

1:1000000
"plate 1" is a satellite shot of new york state, "plate 3" (the reverse) is a legend for the geologic on accompanying map

OCR PDF of supplemental information for the Anorthosite-Charnockite Metamorphic Suite-Adirondack Mountains, New York collection.

OCR PDF of supplemental information for the Northern Apennines Ophiolites collection.

OCR PDF of supplemental information for the Powderhorn Carbonatite collection.

OCR PDF of supplemental information for the Grand Canyon collection.