: a dark coating which is found on rocks after long exposure in desert regions and whose color is due to iron and manganese oxides
Example Sentences
Recent Examples on the WebWill the Arches social media team continue to be able to post about bighorn sheep, desert varnish and other fascinating features of the park? Julie Jag, The Salt Lake Tribune, 15 Aug. 2022 But there are advancements being made that may allow scientists to determine dates by analyzing the desert varnish on rocks.San Diego Union-Tribune, 9 Jan. 2022