dermatitis

Example Sentences

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Traditionally, lithium is mined from sources such as pegmatites, which are coarse-grained igneous rocks, and volcanic clays.

From Science Daily • Apr. 16, 2026

Primary sources for lithium like pegmatites and volcanic clays are well understood, but finding other stores that are safe and economical to exploit would be helpful.

From Science Daily • Apr. 15, 2024

They are not themselves igneous rocks and they do not constitute pegmatites, but they often grade into pegmatites and belong to the same general stage in the sequence of events.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

Yellowish-brown crystals of monazite have been found scattered through granites, gneisses, and pegmatites, but in quantities ordinarily too small to warrant mining.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

Barite itself is not found as an original constituent of igneous rocks or pegmatites, but is apparently always formed by deposition from aqueous solutions.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)