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Manhattan Island, Manhattan (New York Co.), New York City, New York, USA

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Latitude & Longitude (WGS84): 40° 47' 0'' North , 73° 57' 58'' West
Latitude & Longitude (decimal): 40.78333,-73.96611
Köppen climate type:Cfa : Humid subtropical climate


Manhattan Island covers by far the largest portion of the Borough of Manhattan (New York County), otherwise known to inhabitants of New York simply as "The City", the most densely populated of New York city's five boroughs.


Mineral List

Mineral list contains entries from the region specified including sub-localities

65 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Middle Ordovician - Early Cambrian
458.4 - 541 Ma



ID: 2744519
Manhattan Formation, undivided

Age: Paleozoic (458.4 - 541 Ma)

Stratigraphic Name: Manhattan Formation

Description: Pelitic schists, amphibolite; Units ?Omb, ?Omc, and ?Omd may be Cambrian eugeosynclinal rocks thrust upon Oma; ?Omd - sillimanite-garnet-muscovite-biotite-plagioclase-quartz gneiss; ?Omc - sillimanite-garnet-muscovite-biotite-quartz-plagioclase schistose gneiss, sillimanite nodules, local quartz-rich layers; ?Omb - discontinous unit of amphibolite and ?Omc-type schist.

Comments: part of Trenton Group and Metamorphic Equivalents up to 8000 ft. (2400 m). All units (?Omb - ?Omd) are mapped under Om in digital map. Only unit Oma is separated out, so I separated it out of this description. Unit is also mentioned under Eugeosynclinal (Allochthonous) Sequence; uses same symbol and color. Age change and second unit description from USGS Lexicon website (ref. NY046) and reference NY004: Manhattan Schist member A replaced by Walloomsac Formation (not new) based on work by Jackson and Hall (1982), Hall (in press), and A.A. Drake (1990, pers. commun.). In addition, L.M. Hall (1985?, pers. commun.) determined that member B of the Manhattan Schist is part of member C and thus recommended the abandonment of member B (Baskerville, 1992) .

Lithology: Major:{pelitic schist,gneiss,amphibolite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Localities in this Region


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