The Hudosn River? It flows over rock that has been around since the Middle Proterozoic Time Period. That is more then 542 million years ago!!!!
The surface bedrock found in New York State at a latitude of 45 degrees north is primarily from the Mesozoic Era, dating back around 200 to 65 million years ago. This bedrock includes formations such as sedimentary rocks, igneous rocks, and metamorphic rocks.
The surface bedrock of most of the Allegheny Plateau landscape region in New York state is predominantly from the Devonian period, which occurred approximately 419-359 million years ago. This bedrock consists mainly of sedimentary rocks like shale, sandstone, and limestone, which were deposited during this geologic time period.
Syracuse
Devonian.
Limestones, shales, sandstones, and conglomerates
Cod
The surface bedrock of Grand Island, located in the state of Michigan in the United States, was formed during the Precambrian time period. This bedrock consists primarily of ancient metamorphic and igneous rocks that date back over a billion years.
According to the website of the New York State Geological Survey (see related link), the majority of sedimentary bedrock in New York State was deposited in a 160 million year period in the early to middle Paleozoic era from approx. 520 to 360 million years ago.
Ithaca?shale
The Adirondack Mountains, Taconic Mountains, and the Hudson Highlands have the most resistant bedrock.
in the tug hill plateau
The Hudson River in New York State has large amounts of metamorphic bedrock exposed at the surface, particularly in the Hudson Highlands region. This area features prominent cliffs and rock formations formed from metamorphic rocks such as gneiss and schist.