Cascade Slide

• This specimen may be monticellite marble.

• The white calcite and tiny green diopside are clearly visible. There are also small tan-colored crystals that may be monticellite (Tracy, 991).

Cascade Slide

• Blue Calcite with tiny green crystals of diopside.

Cascade Slide

• Olivine metagabbro is included in the USGS for Essex county. This green rock, found at Cascade slide, resembles pictures of olivine found on the Internet.

Cascade Slide

• Pink, angular stone

• Orthoclase feldspar

• According to Roadside Geology, plagioclase feldspar could be found at this location (Van Diver, 308).

http://www4.uwm.edu/course/422-100/Mineral_Rocks/orthoclase_feldspar_data.html, http://www.cartage.org.lb/en/themes/sciences/earthscience/geology/rocksandminerals/mineralsandrocks/minerals/Potassium/Potassium.htm

Cascade Slide

Owl’s Head Mountain

• A view from the top of Owl’s Head Mountain, in the High Peaks Region.

• Exposed rock on the summit is composed of Van Hoevenberg Gneiss (Jaffe, 80).

Owl’s Head Summit

The summit of Owl’s Head is composed mainly of Van Hoevenberg Gneiss (Jaffe, 80).

Owl’s Head Mountain: Melagabbro

• According to Jaffe, the darker colored rock part way up Owl’s Head Mountain is melagabbro (Jaffe, 80).

Melagabbro rock on Owl’s Head Mt.

Owl’s Head

Owl’s Head

Owl’s Head

References• Adirondack Explorer Outtakes. DEC won’t rebuild Duck Hole dam.

http://adirondackexplorer.org/out-takes/2011/11/16/dec-wont-rebuild-duck-hole-dam/

• Jaffe, Howard W. and Elizabeth B. (1986). Geology of the Adirondack High Peaks Region: A Hiker’s Guide. Adirondack Mountain Club, Inc., Lake George, NY.

• Tracy, Robert J. (1978). Monticellite marble at Cascade Mountain, Adirondack Mountains, New York. American Minerologist. 63, 991-999.

• USGS science for a changing world. Geologic units in Essex county. http://tin.er.usgs.gov/geology/state/fips-unit.php?code=f36031

• Van Diver, Bradford B. (1985). Roadside Geology of New York. Mountain Press Publishing Company.