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In geology, adobe are alluvial and playa clays of desert and arid regions, differing from ordinary clays of humid regions in containing carbonates and other soluble minerals.
 Research Adobe
Kernite is a major ore of boron. It is formed in playa lakes with the boron supplied by thermal springs passing through the underlying volcanic rock. It has the formulae Na2B4O7ù4H2O and a relative hardness of 3.
Research Kernite
Playa refers to a shallow basin or plain in a desert where water collects after a rain and then evaporates.
Research Playa
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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