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Viewing posts from January, 2010

Twitchell Island USGS project

Posted by Peter Donovan 12 years, 4 months ago

In the Sacramento Delta of California, a freshwater tidal marsh thick with tules and other marsh vegetation formed carbon-rich peat soils 60 feet deep in places. In the 1870s, farmers began to build dikes, drain the marshes, burn the tules, and farm the peat soils.