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- Publications
- Influence
Global Stratotype Section and Point for base of the Ordovician System
- R. A. Cooper, G. Nowlan, S. H. Williams
- Geology
- 1 March 2001
Ordovician System and base of the lowest Ordovician stage (Tremadocian) is exposed in the coastal platform at Green Point, western Newfoundland, at the 101.8 m level, within Bed 23, in the measured… Expand
THE OLDEST HORSESHOE CRAB: A NEW XIPHOSURID FROM LATE ORDOVICIAN KONSERVAT-LAGERSTÄTTEN DEPOSITS, MANITOBA, CANADA
- D. Rudkin, G. A. Young, G. Nowlan
- Geology
- 2008
A remarkable new fossil horseshoe crab, Lunat- aspis aurora gen. et sp. nov., from recently discovered Upper Ordovician (c. 445 Ma) shallow marine Konservat-Lagerstat- ten deposits in Manitoba… Expand
Exceptionally preserved Late Ordovician biotas from Manitoba, Canada
- G. A. Young, D. Rudkin, Edward P. Dobrzanski, Sean P. Robson, G. Nowlan
- Geology
- 1 October 2007
There are few body fossil biotas known from early Paleozoic accretionary shorelines, and very few examples of Ordovician soft-bodied assemblages. This study documents two recently discovered biotas… Expand
EARLY CAMBRIAN METAZOAN EGGS, EMBRYOS, AND PHOSPHATIC MICROFOSSILS FROM NORTHWESTERN CANADA
- Leanne J. Pyle, G. Narbonne, G. Nowlan, S. Xiao, N. James
- Geology
- 1 September 2006
Abstract Three-dimensionally phosphatized, spherical fossils, interpreted as metazoan eggs and embryos on the basis of taphonomic features and cleavage patterns, are reported for the first time from… Expand
Some Ordovician conodont faunules from the Miramichi Anticlinorium, New Brunswick
- G. Nowlan
- Geology
- 1981
Reappraisal of the Beekmantown Group sedimentology and stratigraphy, Montréal area, southwestern Quebec: implications for understanding the depositional evolution of the Lower-Middle Ordovician…
- O. S. Hersi, D. Lavoie, G. Nowlan
- Geology
- 1 February 2003
Detailed lithostratigraphic mapping of the Beekmantown Group of southwestern Quebec has refined the field application of the previously proposed tripartite division of the group (i.e., Theresa,… Expand
Subaerial unconformity at the Potsdam-Beekmantown contact in the Quebec Reentrant: regional significance for the Laurentian continental margin history
- O. S. Hersi, A. H. Mohamed, D. Lavoie, G. Nowlan
- Geology
- 1 September 2002
ABSTRACT The Cambrian-Ordovician Potsdam and Beekmantown groups of the Quebec Reentrant (southwestern Quebec and southeastern Ontario) were deposited during rifting and drifting phases of the… Expand
False teeth: conodont-vertebrate phylogenetic relationships revisited
ABSTRACT An evidence-based reassessment of the phylogenetic relationships of conodonts shows that they are not “stem” gnathostomes, nor vertebrates, and not even craniates. A significant group of… Expand
Fossils, histology, and phylogeny: Why conodonts are not vertebrates
The term vertebrate is generally viewed by systematists in two contexts, either as Craniata (myxinoids or hagfishes + vertebrates s.s ., i.e. basically, animals possessing a stiff backbone) or as… Expand
A microfauna associated with Early Cambrian trilobites of the Callavia Zone, norther Antigonish Highlands, Nova Scotia
- E. Landing, G. Nowlan, T. P. Fletcher
- Geology
- 1 March 1980
Trilobites of the Callavia Zone s.1. occurring together with phosphatic fossils in the Little Hollow Formation are the first known Early Cambrian faunas from mainland Nova Scotia. The tectono-strat...