Did certain earlier generations of rock originally contain more water than the classical models indicate?  Were they in fact colloidal?  This website presents geological phenomena and experiments that suggest that, in the Archean eon and to some extent even later, this was the case.  It also goes into the question of whether, in earlier times, the earth's atmosphere also contained far more water.

Dried meat slice
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Gel (Colloid)
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Gel (Colloid)
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 started: February 2006
 English translation by Frank Fawcett, USA: 2013