New York


Geological State Symbols Across America  Geology of the National Parks Through Pictures

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New York State Geological Symbols
Year Est.
State Gem
State Fossil
Eurypterus remipes


State Gem: Garnet

Garnet is typically thought of as one specific mineral, however garnet is actually a series of very similar minerals. This mineral series varies in chemical composition, resulting in different mineral names, however the chemical composition of all of the garnets share a generalized chemical composition: X3Y2(SiO4)3, where "X" can be Ca, Mg, Fe2+, or Mn2+, and "Y" can be Al, Fe3+, Mn3+, V3+, or Cr3+. Along with the different chemical compositions, there are different colors and hardnesses associated with each one as well. Crystals of garnet typically form in 12-sided "balls", that can be easy to identify within the rocks that they are found in. The name "garnet" comes from the Latin, "granatus" meaning "like a grain" because of this ball-crystal habit. Garnet is formed from the metamorphism of shale minerals, and can be found in most foliated metamorphic rocks such as schist and gneiss. Garnets can also be found in some igneous rocks including granites and granitic pegmatites. Garnet has been used as a gemstone since ancient Egypt, however recently garnet has obtained significant usage as an abrasive. Since garnet is a rather hard mineral and has no cleavage, it typically breaks into sharp edged fragments, and therefore produces a good grit for water-jet cutting or sandblasting. Garnet is a very common mineral and even high grade gemstone quality specimens can be fairly cheap.


Related: Connecticut State Mineral - Almandine Garnet; Idaho State Gem - Star Garnet; Vermont State Gem - Grossular Garnet

State Fossil: Eurypterus remipes


Eurypterus remipes from the Silurian of Buffalo, NY. Fossil is displayed at Chicago's Field Museum






























Geology of New Yorks's National Parks

Through Pictures

(at least the one's I have been to)

Fire Island National Seashore


National Parks visited but I have no pictures (at this time) to do a geology post

(link directs to NPS site)

Eleanor Roosevelt National Historic Site (2002)

Fort Stanwix National Monument (2002)

General Grant National Memorial (2003)

Home of Franklin D. Roosevelt National Historic Site (2002)

Martin Van Buren National Historic Site (2003)

Sagamore Hill Narional Historic Site (1997, 2003)

Saratoga National Historic Park (2002)

Theodore Roosevelt Inaugural National Historic Site (2002)

Upper Delaware Scenic & Recreational River (1993)

Vanderbilt Mansion National Historic Site (2002)

Women's Rights National Historical Park (2002)

Fire Island National Seashore

Visited in 1998, 2002, and 2005 (and throughout my childhood)