Magothy Formation

Magothy Formation
Stratigraphic range: Turonian
TypeFormation
UnderliesCheesequake Formation
OverliesRaritan Formation
Location
RegionDelaware, Maryland, New Jersey, and New York
CountryUnited States

The Magothy Formation is an Upper Cretaceous geologic formation in northeastern Maryland and extending into Delaware, New Jersey, and New York.

Description

The Magothy Formation extends from Long Island, New York, south to Maryland. It preserves fossils dating back to the Turonian stage of the Cretaceous period.

In New York, the Magothy Formation is best known for its aquifer. The Magothy Aquifer is the main source of drinking water for the majority of Long Island, and the water drawn from it serves millions of people on the island each day.

See also

References

  1. 1 2 Darton, Nelson Horatio (1893). "The Magothy Formation of Northeastern Maryland" (PDF). American Journal of Science. 3rd series. 45 (269): 407–419. Archived from the original (PDF) on 2024-08-07.
  2. 1 2 3 4 Digital Elevations and Extents of Regional Hydrogeologic Units in the Northern Atlantic Coastal Plain Aquifer System From Long Island, New York, to North Carolina (PDF). United States Geological Survey. December 2020. Retrieved 2026-08-05.
  3. 1 2 3 "GROUND WATER ATLAS of the UNITED STATES – Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont, HA 730-M: Surficial and Northern Atlantic Coastal Plain aquifer systems, Long Island". usgs.gov. Retrieved 2026-08-05.