New York Natural Heritage Program
Sandstone Pavement Barrens
Sandstone pavement barrens at Gadway Sandstone Pavement Barrens. Gregory J. Edinger
System: Terrestrial
SubSystem: Barrens And Woodlands

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S1
A State Rarity Rank of S1 means: Typically 5 or fewer occurrences, very few remaining individuals, acres, or miles of stream, or some factor of its biology makes it especially vulnerable in New York State.

Global Rarity Rank: G2
A Global Rarity Rank of G2 means: Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.

Did you know?
It is believed that the Potsdam Sandstone bedrock of these barrens was exposed with catastrophic flooding from the abrupt drainage of Glacial Lake Iroquois during deglaciation, roughly 11,000 years ago. This flooding stripped away much of the soil and unconsolidated material that had previously covered the underlying bedrock (Franzi and Adams 1999). "Potsdam Sandstone" was named by geologist Ebenezer Emmons in 1838 for Potsdam in St. Lawrence County, NY (Emmons 1838).

State Ranking Justification [-]
There are probably less than two dozen occurrences statewide. A few documented occurrences have good viability and a few are protected on public land or private conservation land. This community is limited to the regions of the state underlain with Potsdam Sandstone, and there are only a few high quality examples. The current trend of this community is probably stable for occurrences on private conservation land and public land, or declining slightly elsewhere due to moderate threats that include wildfire suppression, invasive plants, quarrying, excessive ATV use, excessive logging, and trash dumping.

Short-term Trends [-]

Long-term Trends [-]