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The Guelph Formation is at the top of the Lockport Group. It has been called the "Vernon Transition Zone" due to thin beds and laminations between carbonates, claystones and evaporates.
American Association of Petroleum Geologists (AAPG) – Professional geological association; American Crystallographic Association; American Gem Society (AGS), also known as American Gemological Society – American trade association
Illinois Mountain is named for the state of Illinois. During the early 1800s, there was a westward migration of New Englanders to the area of the former Northwest Territory, which included Illinois and Ohio. Some settlers, however, never reached their intended destination, being cut off by the swamps just west of the Marlboro Mountains.
"The Geological Evolution of Collins Lake, Scotia, New York, as Revealed From Sub-Bottom Profiles and Sediment Core Analysis". Union College "New York State Geological Association 39th Annual Meeting" (PDF). The New York State Geological Association. May 5–7, 1967. Archived from the original (PDF) on 2011-07-23
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 ...
The West Falls Group is a geologic group in New York. It dates back to the Devonian period.Also stratigraphically equivalent to the Portage Group. The West Falls formation is bounded above by the Java Formation and below by the Sonyea Formation.
The Clinton Group (also referred to as the Clinton Formation or the Clinton Shale) is a mapped unit of sedimentary rock found throughout eastern North America. [1] [2] The interval was first defined by the geologist Lardner Vanuxem, who derived the name from the village of Clinton in Oneida County, New York where several well exposed outcrops of these strata can be found.
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 ...