The Mississippian-Pennsylvanian boundary as an intercontinental biostratigraphic datum
Brenckle, P.; Lane, H.R.; Manger, W.L.; Saunders, W.B. (1977). The Mississippian-Pennsylvanian boundary as an intercontinental biostratigraphic datum. Newsl. Stratigr. 6(2): 106-116. https://dx.doi.org/10.1127/nos/6/1977/106
In: Newsletters on Stratigraphy. Schweizerbart: Berlin; Stuttgart. ISSN 0078-0421, more
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| Keywords |
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Carboniferous
Foraminifera [WoRMS]
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| Author keywords |
foraminifers; Homoceras Zone; Rhachistognathus primus Zone |
| Authors | | Top |
- Brenckle, P.
- Lane, H.R.
- Manger, W.L.
- Saunders, W.B.
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| Abstract |
Synthesis of information concerning Carboniferous (Namurian) ammonoid cephalopods, conodonts and calcareous foraminifers shows that a significant faunal change occurs at the base of the Homoceras Zone. In western North America, this faunal change takes place in earliest Pennsylvanian strata that yield Rhachistognathus primus Zone conodonts and Mamet Zone 20 foraminifers but are lacking ammonoids. In the North American Midcontinent, the hiatus at the Mississippian-Pennsylvanian boundary has eliminated beds of the Homoceras interval and the oldest Pennsylvanian ammonoids correlate to the base of the Reticuloceras Zone. If the Mississippian and Pennsylvanian are to be employed internationally in a bipartite subdivision of the Carboniferous, the base of the Homoceras Zone, rather than the base of the Reticuloceras, should be chosen as the boundary. The distribution of eosigmoilinid foraminifers in Late Mississippian strata of the North American Midcontinent indicates that the hiatus at the Mississippian-Pennsylvanian boundary is considerably shorter than previously thought, and eosigmoilinids are probably limited to the Eumorphoceras interval. |
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