Scientific data near [39.47000,-76.81000]

Search area extends approximately 1.1 km east-west and 1.4 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Baltimore	county
Maryland	state
United States	country
North America	continent
Land	continent
Map quadrangles, from USGS or Canadian NTS
Reisterstown	quadrangle 1:24,000 scale
Baltimore	quadrangle 1:100,000 scale
Baltimore	quadrangle 1:250,000 scale
Watershed boundaries (USGS hydrologic units)
Gunpowder-Patapsco	hydrologic unit
Upper Chesapeake	hydrologic accounting unit
Upper Chesapeake	hydrologic subregion
Mid Atlantic	hydrologic region

Geology of US states

Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format

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Unit	State	Lithology
Wissahickon Formation; Lower Pelitic Schist	MD	Late Precambrian (?)

Airborne geophysical surveys

Aerial surveys of magnetic anomaly and gamma ray emission; older surveys were analog record which have been digitized, newer surveys collected data in digital form.

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ID	Data type	Description
Baltimore Gneiss	M-Dz	Baltimore Gneiss 3307 line km with spacing 0.80 km over parts of MD
Baltimore	M/R-D	Baltimore 4250 line km with spacing 4.80 km over parts of MD-PA-VA-WV

Estimates of undiscovered mineral resources

National Mineral Resource Assessment 1998: Estimates of the number of undiscovered mineral resources of gold, silver, copper, lead, and zinc within identified permissive tracts (geographic areas in which mineral deposits may form).

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Tract	Deposit Type	Mineralization age
SA20	Low-sulfide Au-quartz vein	Paleozoic

The continental crust

Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain.

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Domain	Crust type	Region
Piedmontia	Extensional accretionary orogen	Southeastern Laurentia and Appalachians

Geochemistry of stream sediments in the US from the NURE-HSSR database

National-scale geochemical analysis of stream sediments and soils in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
5311283	1978-06-12	Stream sediment sample from flowing stream, sieved to less than 149 microns (-100 mesh) and dried at less than or equal to 110øC.

Geochemistry of water samples in the US from the NURE-HSSR database

National-scale geochemical analysis of water samples in the US collected and analyzed under the National Uranium Resource Evaluation program.

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Sample ID	Date collected	Sample type
1238674	1978-06-12	Stream water sample filtered through a 0.8 micron filter at the site.

An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (web-accessible database)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

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Deposit name	Deposit type	Location
Glyndon	Occurrence	Maryland, United States

Global assessment of undiscovered copper resources

Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.

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Tract name	Deposit type	Geology
SA18 - Southern Appalachian Mountains	sediment-hosted stratabound copper	Triassic lacustrine carbonaceous mudstone intervals within sequences of continental sandstone and siltstones of the Newark Supergroup, Culpepper Basin