Results 101 to 110 of about 1,022 (197)

Ordovician conodonts of the Devendeus Formation at the Angosto de La Quesera (Cordillera Oriental of Salta, Argentina): Taxonomic considerations and biostratigraphic significance

Geologica Acta, 2011
Conodonts recovered from the Devendeus Formation at the Angosto de La Quesera locality (Cordillera Oriental of Salta) in northwestern Argentina include Nogamiconus sp., Problematoconites perforatus, Drepanoistodus sp., Oneotodus sp., Scolopodus filosus ...
J. CARLOROSI, S. HEREDIA, Guillermo F. Aceñolaza   +2 more
doaj  

Early Ordovician (Tremadocian) faunas and biostratigraphy of the Gerd-Kuh section, eastern Alborz, Iran [Elektronisk resurs]

, 2015
The Tremadocian of the East Alborz Region is dominated by condensed fine clasticsediments. These beds have yielded low to medium diversity trilobite associations, which belong to theolenid, nileid and raphiophorid biofacies, characteristic of an outer ...
Popov, L, Rasuli, R., Holmer, Lars E.,, Amini, A., Jahangir, H., Ghobadi Pour, M., Fallah, K., Hosseini-Nezhad, M.   +7 more
core  

New late Tremadocian (Early Ordovician) conodont and graptolite records from the southern South American Gondwana margin (Eastern Cordillera, Argentina)

Geologica Acta, 2009
New late Tremadocian (Early Ordovician) conodont and graptolite faunas from the eastern and central belts of the Eastern Cordillera (Jujuy Province, northwestern Argentina) are reported.
G.L. ALBANESI, G. ORTEGA
doaj  

Advances in the Ordovician graptolite biostratigraphy of the St Petersburg area, Russia [PDF]

Estonian Journal of Earth Sciences, 2009
The Ordovician shallow-water shelf deposits rich in benthic fauna are exposed along the Russian part of the Baltic–Ladoga Klint. Graptolites occur only at some stratigraphic levels, being comparatively numerous in marls and clays and very rare in ...
Suyarkova, Anna A., Koren,Tatyana N.
doaj  

Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation. [PDF]

Sci Rep, 2022
Saleh F, Guenser P, Gibert C, Balseiro D, Serra F, Waisfeld BG, Antcliffe JB, Daley AC, Mángano MG, Buatois LA, Ma X, Vizcaïno D, Lefebvre B.   +12 more
europepmc   +1 more source

ON THE CORRELATION OF THE TREMADOCIAN AND ARENIGIAN BOUNDARY BEDS IN THE EAST BALTIC [PDF]

Proceedings of the Academy of Sciences of the Estonian SSR. Geology, 1989
Silvi Mägi, Viive Viira, Helje Aru
openaire   +1 more source

Tremadocian carbonates of the lower St. George Group, Port au Port Peninsula, western Newfoundland: Lithostratigraphic setting of diagenetic, isotopic, and geochemistry studies [PDF]

, 2008
Detailed stratigraphic measurements and sampling of rocks of the lower St. George Group on the western shore of Isthmus Bay, Port au Port Peninsula, are the foundation for diagenetic, isotopic, and geochemistry studies of Tremadocian shallow-shelf ...
Lavoie, Denis, Knight, I. (Ian), Boyce, W. Douglas, Azmy, Karem   +3 more
core   +1 more source

Synchronizing rock clocks in the late Cambrian. [PDF]

Nat Commun, 2022
Zhao Z, Thibault NR, Dahl TW, Schovsbo NH, Sørensen AL, Rasmussen CMØ, Nielsen AT.   +6 more
europepmc   +1 more source

Tribes Hill–Rochdale formations in east Laurentia: proxies for Early Ordovician (Tremadocian) eustasy on a tropical passive margin (New York and west Vermont)

, 2011
Slow subsidence and tectonic quiescence along the New York Promontory margin of Laurentia mean that the carbonate-dominated Tribes Hill and overlying Rochdale formations serve as proxies for the magnitude and timing of Tremadocian eustatic changes.
JONATHAN M. ADRAIN, BJÖRN KRÖGER, ED LANDING, STEPHEN R. WESTROP   +3 more
core   +1 more source

The Liexi fauna: a new Lagerstätte from the Lower Ordovician of South China. [PDF]

Proc Biol Sci, 2022
Fang X, Mao Y, Liu Q, Yuan W, Chen Z, Wu R, Li L, Zhang Y, Ma J, Wang W, Zhan R, Peng S, Zhang Y, Huang D.   +13 more
europepmc   +1 more source