Reference : Comparison of cross-field pitting in fresh, dried and charcoalified softwoods
Scientific journals : Article
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
Comparison of cross-field pitting in fresh, dried and charcoalified softwoods
Gerards, Thomas mailto [Université de Liège - ULiège > > Chimie organique de synthèse >]
Damblon, Freddy [Université de Liège - ULiège > > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
Wauthoz, B. [> > > >]
Gerrienne, Philippe mailto [Université de Liège - ULiège > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
IAWA Journal
Int Assoc Wood Anatomists
[en] softwood ; cross-field ; charcoalification ; piceoid ; taxodioid ; cupressoid
[en] Cross-field pitting is one of the most reliable characters for softwood identifi cation. During charcoalification, a range of severe qualitative and quantitative modifications may occur in cross-field pitting. As most fossil or archaeological wood remains are preserved as charcoal (fusain), the question arises whether these modifications hamper the accurate identification of some taxa. This work is a systematic biometric study of a wide range of gymnosperm cross-field pitting after experimental charcoalification. We focused on the window-like, piceoid, taxodioid, cupressoid, araucarioid and podocarpoid cross-field pitting types. Our main results are the following: 1) Cross-field pits of wood specimens dried out before charcoalification are hidden by a thin closing wall; in this case, it is often impossible to discriminate between the various types of cross-field pitting. 2) Piceoid cross-field pitting becomes taxodioid-like after charcoalification. 3) Biometric study of charred softwood cross-field pitting dimensions shows that the ratios between height and width of pit aperture and border allow us to distinguish and characterise four types of pitting (window-like, piceoid, taxodioid, cupressoid + araucarioid + podocarpoid [= CAP]). The discrimination within the CAP type requires further investigation.

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