Conodont elements are composed of complex aggregates of proteins and apatite-(CaF) (e.g.
The
conodont elements are generally well preserved with a CAI (conodont colour alteration index) below 1.5.
By contrast to the previous sample interval, the
conodont element abundance in Est09:OS2 must be considered fairly high; the 2047.2 g sample yielded 2851 elements, i.e.
Conodont elements known to be related to the Triassic age would be as follows: Prioniodella Prioniodellides, Hindeodella multihamata, Hindeodella nevadensis, Lonchodina nevadensis, Hindeodella triassica, Ligonodina triassica, Diplodella lautissima, Pachycladina oblique, Hadrodontina anceps, Ellisonia triassica, hibardella subsymmertica, Parachirognathus geiseri, Prioniodella decrescens, Enantiognathus bitortus, Chirognathus sp., Xaniognathus sp., and Anchiognathudos sp.
"We created high resolution 3D models of the
conodont elements using x-rays from a particle accelerator in Japan, using it like a giant CT scanner.
1997) yielded only two poorly preserved
conodont elements of middle Arenig to Llanvirn age (Nowlan 1981).
Despite the great abundance of
conodont elements, few age-diagnostic species were obtained from carbonates of the Wink Member.
In the Pakri Cape section 58-97% of
conodont elements were redeposited, while conodonts were derived from several underlying strata (Lofgren et al.
The Lower Carboniferous (Upper Tournaisian)
conodont elements were collected from a section located in the Pechora region (North Russia, Pechora Swell, N 65[degrees]4'21", E 56[degrees]43'13"), where the host rocks represent the Idzhid Formation (Figs 1, 2).
For correlation and investigation of morphologic changes of
conodont elements, data from some additional outcrops and borehole sections were used.
Lithological samples, residues and
conodont elements are housed in the 'Inventario Paleontologia Universita di Modena e Reggio Emilia-IPUM' at the Dipartimento di Scienze Chimiche e Geologiche, Universita degli Studi di Modena e Reggio Emilia, Modena, Italy.
In total, 26 samples from the Homerian and Gorstian yielded more than 400, mostly fragmented
conodont elements. Only few samples were barren.