Abstract
Four fossil woods, between 55 and 65 million years old, coming from the Canadian Arctic regions were analysed with respect to their dichloromethane extract components. In comparison with the extracts of younger fossils they contained only a limited number of components which belonged, furthermore, to relatively few classes of compounds namely aliphatic hydrocarbons, fatty acids, long chain alcohols and diterpenes. The fossil identified as a Douglas fir had only one of the expected compounds owing, perhaps, to the rather low amount of extractives or terpenes in the original wood. Another fossil, might have been a spruce. while of the remaining two unidentified fossils one could be attributed to a terpene-rich species (e. g. larch) while the other to a species rich in extractives different from diterpenes. However, much more data, based on samples taken from various locations and with a different composition of extractives are needed in order to determine the influence of a specific environment on aging.
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