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Anna I. Jonas

Publications and source records attributed to Anna I. Jonas.

2 recordsLinked to original sources

Manganese-bearing veins in southwestern Virginia

Veins carrying manganese silicates largely in the form of the manganese garnet, spessartite, occur in the crystalline schists and gneisses of Carroll and Grayson Counties, Virginia, in the southern parts of the Galax and Independence quadrangles just north of the North Carolina State line. This brief paper includes a discussion of these manganese-bearing veins which are described in a report on the Geology and Mineral resources of the Great Gossan Lead district prepared by G. W. Stose and the writer for publication by the Virginia Geological Survey

Virginia

Relation of the Wissahickon mica gneiss to the Shenandoah limestone and Octoraro schist of the Doe Run and Avondale region, Chester County, Pennsylvania

The region discussed in this paper lies in Chester County, Pa., and is included in the eastern half of the Coatesville quadrangle. (See fig. 3.) It is within the belt of crystal-line schists and gneisses of the Piedmont Plateau. The northern half of the area, which will be called the Doe Run region, from the village of that name (see Fig. 4, p. 15), has been surveyed by Eleanora F. Bliss in connection with the problem of the relation of the Wissahickon mica gneiss to the Octoraro schist.

Pennsylvania