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DGS Annual Report

DGS Annual Report of Programs and Activities.

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Site content related to keyword: "Ilmenite"

Brandywine Blue Gneiss

Obbg

Medium to coarse grained granulites and gneisses composed of plagioclase, quartz, orthopyroxene, clinopyroxene, brown-green hornblende, magnetite, and ilmenite. Mafic minerals vary from < 5-30 modal percent. A lineation due to a preferred orientation of quartz and mafic minerals is obvious on weathered surfaces. Unit contains thin, discontinuous fine-grained mafic layers.

B7 Engineering Materials of Northern New Castle County

B7 Engineering Materials of Northern New Castle County

This investigation was undertaken to locate deposits of rock, sand, gravel, fill and borrow in northern New Castle County which may be potential sources of material for highway construction, and to prepare maps and descriptions of the surficial earth materials relative to their geologic and engineering properties.