Here's a breakdown:
* Devonian Period: This period saw the formation of vast, shallow seas across North America. The sandstones we find in New York were formed from sediments (mostly sand) that were deposited in these seas. Over time, these sediments were buried under layers of other sediments and compacted, eventually turning into sandstone.
* Other Periods: While the Devonian Period is the primary source of New York's sandstone, there are also some sandstone formations from other periods, including the Cambrian and Ordovician periods.
Key points to remember:
* Sandstone formation: Formed from sand grains cemented together, usually by silica or calcite.
* Sedimentary rocks: Sandstone is a sedimentary rock, meaning it is formed from the accumulation of sediments.
* Geologic timescale: The Paleozoic Era is a major division of geologic time, spanning hundreds of millions of years.
Examples of New York State sandstone:
* The Catskill Formation, a famous Devonian-age sandstone unit that is visible in the Catskill Mountains.
* The Shawangunk Formation, another Devonian-age sandstone that forms the Shawangunk Ridge.
These formations are not only geologically important but also offer beautiful scenic landscapes and recreational opportunities.
