At one point, for example, the authors claim that they have been able to "provide an updated interpretation and correlation of Tofino Basin Cenozic stratigraphy with new integrated foraminifer and ichthyolith
biostratigraphies and strontium age controls" (366).
Middle/Late Devonian phoebodont-based ichthyolith
However, each of the above shall be taken into account carefully (see Trueman & Tuross 2002): enrichment in MREEs, the so-called 'bell-shaped' pattern, is characteristic of most of the post-Cretaceous and Palaeozoic ichthyolith
and conodont bioapatite (e.g.
H., eds), Ichthyolith
Issues Special Publication, 6, 64-67.
Issues, Special Publication, 1, 53-59.
H., ed.), Ichthyolith
Issues Special Publication, 2, 15.
(1997): Taxonomy and Biostratigraphy of Middle and Late Triassic elasmobranch ichthyoliths
from northeastern British Columbia.
In other words, the observed Ce anomaly is not limited to marine carbonate, conodonts and ichthyoliths
, while the whole-rock Ce anomaly can be used as an indicator of intensity of anoxia and therefore of eustatic sea-level.
The presence of the chondrichthyan ichthyoliths
gives a better picture of what the environment of the site was during the Mississippian.
and Late Devonian events in Poland and Germany.
Rare earth elements in ichthyoliths
: variations with redox conditions and depositional environment.