The Medina Group or Cataract Group is a
geologic group
In geology, a group is a lithostratigraphic unit consisting of a series of related formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into superg ...
in
New York
New York most commonly refers to:
* New York (state), a state in the northeastern United States
* New York City, the most populous city in the United States, located in the state of New York
New York may also refer to:
Places United Kingdom
* ...
. It dates to the
Silurian
The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...
period
Period may refer to:
Common uses
* Period (punctuation)
* Era, a length or span of time
*Menstruation, commonly referred to as a "period"
Arts, entertainment, and media
* Period (music), a concept in musical composition
* Periodic sentence (o ...
. The group includes the
Whirlpool Sandstone
A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. Small whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be called maelstroms ( ). ''Vo ...
,
Power Glen Shale
The Power Glen Shale is a geologic formation in New York. It preserves fossils dating back to the Silurian period.
See also
* List of fossiliferous stratigraphic units in New York
This article contains a list of fossil-bearing stratigraphic u ...
,
Devils Hole Sandstone
A devil is the personification of evil as it is conceived in many and various cultures and religious traditions.
Devil or Devils may also refer to:
* Satan
* Devil in Christianity
* Demon
* Folk devil
Art, entertainment, and media
Film and ...
,
Grimsby Formation,
Thorold Sandstone,
Cambria Shale, Cabot Head Shale and
Kodak Sandstone.
References
Geologic groups of New York (state)
Silurian New York
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