Scientific data near [18.16000,-67.02000]

Search area extends approximately 2.2 km east-west and 2.3 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
San German	municipio
Puerto Rico	territory
U.S. possessions and associated areas
North America	continent
Land	continent
Watershed boundaries (USGS hydrologic units)

Geology of Puerto Rico

Geologic units and faults from USGS Open File Report 98-38, concerning assessment of the mineral resources of Puerto Rico

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Unit	Lithology	Description
Serpentinite	Serpentinite	Sheared light- to dark-green, serpentinite; chiefly altered harzburgite. Epiclastic serpentinite is poorly sorted, unsheared, and retains a characteristic epiclastic appearance in both clasts and matrix. Exposed in the Mayaguez, Rosario, Maricao, Sabana Grande, Yauco, Punta Verraco, Parguera, Cabo Rojo, San German, and Puerto Real quadrangles
Two pyroxene olivine basalt	Basalt	Porphyritic augite hypersthene-olivine basalt. Exposed in the Yauco, Sabana Grande, Guanica, Parguera, San German, Cabo Rojo, Mayaguez, Rosario, and Maricao quadrangles
Diorite	Diorite	Porphyritic diorite. Exposed in the Fajardo, Naguabo, Corozal, Coamo, Rio Descalabrado, Rosario, Comerio, Aquas Buenas, Ciales, Central La Plata, Orocovis, Mayaguez, and Puerto Real quadrangles
Yauco Formation	Mixed carbonate/clastic rock	Siltstone, claystone; sandstone, limestone, and conglomerate. Interbedding of the Yauco with the Maricao, Anon, and Lago Garzas, which have fossils of Tertiary age, may indicate an age spread from Tertiary to Upper Cretaceous, for the Yauco, but fossils of Tertiary age from the Yauco are not known. Estimate thickness in excess of 1,200 m. Exposed in the Yauco, Ponce, Penuelas, Adjuntas, Monte Guilarte, Maricao, San German, Sabana Grande, Rosario, Mayaguez, Puerto Real, Central La Plata, and Rincon quadrangles

Mineral Resource Data System

MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic characteristics, production, reserves, resources, and references.

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Site name	Development	Commodities
Rosario North	Prospect	CR CO FE NI
Rosario North Deposit	Occurrence	NI FE CO CR

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
Rosario North Deposit	Occurrence	Puerto Rico, United States
Rosario North	Occurrence

National Geochemical Database: Sediment

Geochemical analysis of sediment samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are of stream sediment in the continental US and Alaska.

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Sample ID	Sample source	Sample notes
BHK451	float/colluvium/talus	SD; utmx=90600.; utmy=35820.; float
BHK452	float/colluvium/talus	SD; utmx=90500.; utmy=35840.; float
BHK453	float/colluvium/talus	SD; utmx=90400.; utmy=35850.; float
BHK454	float/colluvium/talus	SD; utmx=90460.; utmy=35575.; float
BHK455	float/colluvium/talus	SD; utmx=90420.; utmy=36700.; float
BHK456	float/colluvium/talus	SD; utmx=90460.; utmy=36880.; float

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
Santiago	porphyry copper	Cretaceous-Eocene oceanic arc associated with subduction along the northern Caribbean Plate boundary, corresponding to the modern Greater Antilles Arc

USMIN Mineral Deposit Database

A developing national-scale geospatial database that will be an authoritative source of information on the most important mines, mineral deposits, and mineral districts of the United States.

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Site name	Feature type	Commodities
South deposit	Deposit	cobalt; chromium; iron; nickel