desert varnish

noun

Definition of desert varnish

: a dark coating which is found on rocks after long exposure in desert regions and whose color is due to iron and manganese oxides

First Known Use of desert varnish

circa 1898, in the meaning defined above

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The first known use of desert varnish was circa 1898

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Cite this Entry

“Desert varnish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/desert%20varnish. Accessed 22 Oct. 2020.

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Britannica.com: Encyclopedia article about desert varnish

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