Definitions from Wiktionary (rock varnish)
▸ noun: A dark coating on rock surfaces exposed to the atmosphere, mostly comprising clay and oxides, which grows at only a few micrometers per thousand years; found especially in arid deserts.
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▸ noun: A dark coating on rock surfaces exposed to the atmosphere, mostly comprising clay and oxides, which grows at only a few micrometers per thousand years; found especially in arid deserts.
Similar:
desert varnish,
rockwork,
ozokerit,
gossan,
ozokerite,
rock,
rimrock,
rock soap,
rockallite,
woodrock,
more...
Opposite:
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▸ Wikipedia articles (New!)
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▸ Rhymes of rock varnish
▸ Invented words related to rock varnish