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Data to accompany U.S. Geological Survey Fact Sheet 2020-3017: Pyrrhotite distribution in the conterminous United States


Publication Date


Mauk, J.L., and Horton, J.D., 2020, Data to accompany U.S. Geological Survey Fact Sheet 2020-3017: Pyrrhotite distribution in the conterminous United States: U.S. Geological Survey data release,


The mineral pyrrhotite, which is an unstable sulfide mineral, was present in crushed stone aggregate used in concrete foundations of homes in Connecticut and Massachusetts, many of those foundations are failing as the mineral weathers. Because of the substantial costs of lifting homes and replacing their foundations, in 2019 the U.S. Congress directed the U.S. Geological Survey’s (USGS) Mineral Resources Program to help assess the national risk of pyrrhotite in aggregate. The data presented here help form a map that shows where pyrrhotite may occur across the conterminous United States, which can help inform risk assessments. Pyrrhotite occurs in some mineral deposits, and it also forms from pyrite during metamorphism, so it occurs [...]


Point of Contact :
Jeffrey L Mauk
Originator :
Jeffrey L Mauk, John D Horton
Metadata Contact :
John D Horton
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Geology, Geophysics, and Geochemistry Science Center
USGS Mission Area :
Energy and Minerals

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These data are a subset of geologic units that may contain the mineral pyrrhotite from the national-scale, State Geologic Map Compilation. The data are suitable for use in Geographic Information Systems (GIS) or other database and geospatial software. Compilation of data of this type is a part of the mission of the Mineral Resources Program of the U.S. Geological Survey. The information is intended to meet the needs of a wide community of users that extends from geoscience and mineral exploration communities to State and Federal agencies, private industry, and the general public.

Additional Information


Type Scheme Key
DOI doi:10.5066/P9QSWBU6

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