Rock varnish microlamination dating

It is made up of clays and iron and manganese oxides.

As such the chemical composition of the varnish is different from that of the rocks on which they form and thus the components, especially manganese, of the varnish must be derived from air-borne dust and rainwater.

One of the most common places to find rock varnish is in deserts were this varnish is called desert varnish.

You might start to wonder just how old those stains are on those rocks.We use cookies to make interactions with our website easy and meaningful, to better understand the use of our services, and to tailor advertising.For further information, including about cookie settings, please read our Cookie Policy .Rock varnish microlamination (VML) dating uses the slow buildup of 'varnish' or dark coating on subaerially exposed rock surfaces.It is the world's slowest-accumulating sedimentary deposit at around ~1μm per 1000 years.

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