How To Use Fusain In A Sentence

As an independent check on the overall oxygen trend, it is notable that fusain is found for the first time in the Late Devonian.
Minor amounts of fusain also occur in association with the fossils.
In nearly all cases, fusain had the largest ratio of C-C bonds.
Moins que maintenant bien sur mais je pense que ce sera possible ya pas d'raison et ... pis ... heu ben bien entendu je m'arme de sketchbook de fusain de crayon de bois de sanguine enfin! Pinku-tk Diary Entry
The conglomerate is overlain by a claystone-dominated fossiliferous interval, which contains spirorbid worm tubes, abundant conchostracans, plant debris, fusain, and a pygocephalomorph-bearing limestone.

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Forest fire, a major disturbance agent in some modern forests, does not appear to be a major factor given the rarity of fusain in the Buchanan Lake Formation deposits.