Search results
Results from the WOW.Com Content Network
The geology of the State of New York is made up of ancient Precambrian crystalline basement rock, forming the Adirondack Mountains and the bedrock of much of the state. These rocks experienced numerous deformations during mountain building events and much of the region was flooded by shallow seas depositing thick sequences of sedimentary rock ...
"Geologic map of New York: Finger Lakes sheet". New York State Museum; Bergin, M. J. (1964). "Bedrock Geology of the Penn Yan and Keuka Park Quadrangles New York". Geological Survey Bulletin (1161-G). USGS; Schieber, J. (1999). "Distribution and deposition of mudstone facies in the Upper Devonian Sonyea Group of New York".
Details of the type locality and of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line at the National Geologic Map Database. [1] The formation comprises dolomites , limestones and shales and reaches a thickness of 495 feet (151 m) in the subsurface, while in outcrop the group can be 60 feet (18 ...
The most recent major geologic force that shaped New York's landscape into its current form was the movement of a glacier during the late Pleistocene, which began to recede from the region around 18,000 years ago, [6] leaving behind many characteristic landforms, such as the Hudson River, [6] the Finger Lakes, [7] and the Helderberg Escarpment.
Rough map of the Portage Escarpment (black line) in New York, Pennsylvania, and Ohio. The Portage Escarpment is a major landform in the U.S. states of Ohio, Pennsylvania, and New York which marks the boundary between the Till Plains to the north and west and the Appalachian Plateau to the east and south.
Not all routes are signed. All routes are maintained by the Erie County Department of Public Works, Division of Highways. The area has over 300 routes, due to the urbanizing of Erie County. Routes 250 through 511 all run in a general northeast–southwest pattern. No other patterns exist in Erie County.
The Triassic Stockton Formation is a mapped bedrock unit in Pennsylvania, New Jersey, and New York. It is named after Stockton, New Jersey, where it was first described. It is laterally equivalent to the New Oxford Formation in the Gettysburg Basin of Pennsylvania and Maryland. [1]
The name was coined by T.A Conrad, 1839 in the New York State Geological Survey Annual Report. Named for the Helderberg Escarpment or Helderberg Mountains. [1] The upper portion of the Helderberg, or the Kalkberg Formation is host to the Bald Hill ash bed, dated to 417.6 million years ago. [2] The Helderberg is composed chiefly of limestone and ...