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Map showing publication footprint
  • Usage in publication:
    • Roseland anorthosite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Anorthosite
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Ross, C.S., 1941, Occurrence and origin of the titanium deposits of Nelson and Amherst Counties, Virginia: U.S. Geological Survey Professional Paper, 198, 59 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp198]


Summary:

Named Roseland anorthosite for Roseland, Nelson Co., VA. Consists of antiperthitic andesine. It is cut by numerous quartz veins, dikes rich in ferromagnesian minerals, and large lenticular bodies of rock called nelsonite; intrudes gneissic quartz monzonite that forms dominant country rock of the region. Unit has been referred to as pegmatite and syenite by earlier workers. The Roseland is considered to be of Precambrian age.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Roseland anorthosite
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Rader, E.K., and Evans, N.H., 1993, Geologic map of Virginia; expanded explanation: Virginia Division of Mineral Resources, 80 p.


Summary:

Unit used informally on the VA State map. Described as white alkalic anorthosite containing andesine antiperthite megacrysts, blue quartz, and lesser orthopyroxene and rutile. Pervasive cataclastic fabric.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Roseland Anorthosite*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Rankin, D.W. (editor), Chiarenzelli, J.R., Drake, A.A., Jr., Goldsmith, Richard, Hall, L.M., Hinze, W.J., Isachsen, Y.W., Lidiak, E.G., McLelland, James, Mosher, Sharon, Ratcliffe, N.M., Secor, D.T., Jr., and Whitney, P.R., 1993, Proterozoic rocks east and southeast of the Grenville Front, IN Reed, J.C., Jr., and others, eds., Precambrian; conterminous U.S.: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. C-2, p. 335-461.


Summary:

Roseland Anorthosite has a Sm-Nd whole rock isochron date of 1045+/-44 Ma, interpreted to be age of crystallization (Pettingill and others, 1984).

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Roseland Anorthosite*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Reed, J.C., 1993, Generalized correlation chart for the Precambrian rocks of the conterminous United States, IN Reed, J.C., Jr., and others, eds., Precambrian; conterminous U.S.: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. C-2.


Summary:

On the correlation chart for Precambrian rocks of the conterminous United States, the Roseland Anorthosite of the central and southern Laurentian Appalachians is shown to be of Middle Proterozoic age (1100-1000 Ma).

Source: GNU records (USGS DDS-6; Reston GNULEX).


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Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

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