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Swiss Journal of Geosciences
Fig. 6 | Swiss Journal of Geosciences

Fig. 6

From: A resin nodule in the Cretaceous Garschella Formation from Langer Köchel (Bavaria, S Germany): possible origin and palaeogeographic provenance

Fig. 6

Gas chromatogram of the chloroform/methanol (7/3 volume ratio) extract. Compounds indicated with a number are identified (or tentatively identified). The structures of several dicyclic and tricyclic hydrocarbons are determined by a combination of different methods using the mass spectra of the respective compounds. These are partly based upon library search (NIST, WILEY), literature research (Bendoraitis 1974; Gallegos 1984; Richardson and Miller 1987) and extrapolation of the mass spectral fragmentation of known compounds. Structures belong to the numbers below. The C17-position of the cholestane skeleton is marked by asterisks. The positions of side groups or chains figured as dashed lines are not ensured. Reference: Ursula Baumer and Johann Koller, Doerner Institut

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