''Eoconodontus'' is an extinct genus of conodonts of the Late Cambrian. It is a two-elements (rounded and compressed) genus from the ''

Proconodontus ''Proconodontus'' is an extinct genus of conodonts in the family Proconodontidae. The specimens are found in Cambrian formations.Late Cambrian euconodonts from Sweden. Hubert Szaniawski and Stefan Bengtson, 1998, Proceedings of the Sixth Europe ...

'' lineage.

Use in stratigraphy

It is suggested that ''Eoconodontus notchpeakensis'' can be a marker of the Stage 10 of the

Furongian The Furongian is the fourth and final epoch and series of the Cambrian. It lasted from to million years ago. It succeeds the Miaolingian series of the Cambrian and precedes the Lower Ordovician Tremadocian Stage. It is subdivided into three sta ...

the fourth and final series of the Cambrian. In 2006, a working group proposed the first appearance of ''

Cordylodus andresi ''Cordylodus'' is an extinct genus of conodonts in the family of Cordylodontidae. Use in stratigraphy It is suggested that ''Cordylodus andresi'' can be a marker of the Cambrian Stage 10. Distribution Fossils of ''Cordylodus'' have been fo ...

''. Currently the first appearance of ''E. notchpeakensis'' is favored by many authors because it is globally widespread and is independent of

facies In geology, a facies ( , ; same pronunciation and spelling in the plural) is a body of rock with specified characteristics, which can be any observable attribute of rocks (such as their overall appearance, composition, or condition of formatio ...

(known from continental rise to peritidal environments).Landing, E.; Westrop, S.R.; Adrain, J.M. (19 September 2011). "The Lawsonian Stage - the Eoconodontus notchpeakensis FAD and HERB carbon isotope excursion define a globally correlatable terminal Cambrian stage". Bulletin of Geosciences, pages 621–640, The ''Eoconodontus notchpeakensis'' proposal would also incorporate a non-biostratigraphic marker to correlate the beginning of Stage 10 globally. A carbon isotope excursion (the HERB-event) occurs in the lower part of the ''E. notchpeakensis'' range.

References

External links

* * Proconodontida genera Cambrian conodonts Paleozoic life of Newfoundland and Labrador {{Conodont-stub Cambrian genus extinctions