Proceedings of the Twelfth Annual Meeting of the Society for Organic Petrology, Jackson, Wyoming, USA 25-30 September 1994

bog soils bois canada carbon charbon china chine coal estratigrafia eua geochemistry geochimie geologia geologie geology indonesia madera organic soils peat soils petrologia petrologie petrology soil organic matter sol organique sol tourbeux stratigraphie stratigraphy suelo turboso usa wood