Researchers have synthesized clays that can remove arsenic from potable groundwater 1. The clays, which contain nanopillars of iron oxide and manganese oxide, remove arsenic by binding to arsenic ...

Black varnish has 50 times the concentration of manganese in nearby soils. The formation of desert varnish is controversial, for although the thin veneer of clay and mineral oxides always contains ...

Desert patina is a very thin layer of manganese, iron, dust and clay. And the most amazing part is those rocks also are coated with millions of microscopic bits of lichen, moss and bacteria.

In the Sierra Mixe of Oaxaca, Mexico, an international team of researchers analyzed dozens of unfired clay sculptures and ...

Journal: Geochimica et Cosmochimica Acta Published: 2024-10-02 DOI: 10.1016/j.gca.2024.09.034 Affiliations: 6 Authors: 8 ...