The above, grayed out area, roughly outlines the location of the Town of Poestenkill within the Rensselaer Plateau. Ten towns comprise parts of the Rensselaer Plateau.
A"gateway" to the Rensselaer Plateau, Poestenkill was separated from Sand Lake and became a distinct and separate town on March 2, 1848. It takes its name from the Poesten Kill an important Rensselaer County stream that flows northwesterly through the Town of Brunswick then on into Troy before entering the Hudson River. A detailed map of the Town of Poestenkill is available, as part of a Rensselaer County map at the GIS & Mapping section of the Rensselaer County Online. The elevation at the Poestenkill Town Hall at 38 Davis Drive is 480 feet. The 2010 census population of Poestenkill was 4,530 -- an increase of 12% from the 2000 census. The town is serviced by the Berlin Central, Brunswick and Averill Park school districts.
In researching this posting, I was quite impressed Town of Poestenkill's Comprehensive Plan and the Town's focus on Conservation & Environment. The Town has a Natural Resource Conservation Plan that includes this section on mining -- something I believe all town governments on the Plateau should be wary of given the predominance of valuable graywacke:
Graywacke - Wikipedia
History of Poestenkill, NY
History of the Seventeen Towns of Rensselaer County from the Colonization of the Manor of Rensselaerwyck until the Present time
Landmarks of Rensselaer County
Map of Poestenkill, NY
Residents Against Mining
Town of Poestenkill, NY
Town of Poestenkill, NY - Wikipedia
2010 Census Data