Reduction spheroids from the Upper Carboniferous Hopewell Group, Dorchester Cape, New Brunswick: notes on geochemistry, mineralogy and genesis

10.4138/2085 ◽  
1996 ◽  
Vol 32 (2) ◽  
Author(s):  
Allan W. Lines ◽  
John Parnell ◽  
David J. Mossman
Keyword(s):  
New Brunswick ◽  
Upper Carboniferous

Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications

Crustaceana ◽  
2014 ◽  
Vol 87 (11-12) ◽  
pp. 1338-1350 ◽  
Author(s):  
Yan-Bin Shen ◽  
Frederick R. Schram
Keyword(s):  
New Brunswick ◽  
Shell Gland ◽  
Soft Body ◽  
Digestive Tube ◽  
Upper Carboniferous ◽  
Clam Shrimp ◽  
Special Genus

Leaia is a special genus of extinct “conchostracan” branchiopods; its soft parts have not been known until now. The leaiid specimens with soft bodies reported in the present paper came from two localities: the Upper Carboniferous Canso Group of New Brunswick, Canada, and the Permian Mount Glossopteris Formation of the Ohio Range, Holick Mountains, Antarctica. They include head, biramous antennae, mandible, shell gland, male claspers, and digestive tube. These parts together fully demonstrate that the leaiid clam shrimp indeed should be attributed to the crustaceans, instead of Mollusca. Based on the ribbed valves and structure of soft parts it should be placed in the branchiopodan Diplostraca. We believe that this group, which went extinct at the end of the Permian, is quite different from those of Laevicaudata, Spinicaudata, and Cyclestheriida. Hence, it should have its own higher taxon, Leaiina. The well-developed and sharply pointed head, delicate and short biramous antennae, in concert with the radial ribs on the valves probably indicate a burrowing in-faunal habit.

Trace-element mobility during low-grade metamorphism and silicification of basaltic rocks from Saint John, New Brunswick

1983 ◽  
Vol 20 (3) ◽  
pp. 431-435 ◽  
Author(s):  
J. Dostal ◽  
D. F. Strong
Keyword(s):  
New Brunswick ◽  
Rare Earths ◽  
Low Grade ◽  
Element Mobility ◽  
Upper Carboniferous ◽  
Basaltic Rocks ◽  
Trace Element Mobility ◽  
Saint John ◽  
Ree Patterns ◽  
Basaltic Lavas

Upper Carboniferous basaltic lavas from Saint John, New Brunswick were metamorphosed under prehnite–pumpellyite conditions and some were also affected by extensive silicification. Silicification led to simple dilution of relatively immobile elements such as rare earths, Y, Zr, Hf, Th, and Sc. The chondrite-normalized REE patterns of the silicified rocks are parallel to those of basalts.

scholarly journals Reassessment of vertebrate ichnotaxa from the Upper Carboniferous ‘Fern Ledges’, Lancaster Formation, Saint John, New Brunswick, Canada

2016 ◽  
Vol 52 ◽  
pp. 021 ◽  
Author(s):  
Matthew R. Stimson ◽  
Randall F. Miller ◽  
Spencer G. Lucas
Keyword(s):  
New Brunswick ◽  
New Combination ◽  
Upper Carboniferous ◽  
Invertebrate Paleontology ◽  
Saint John ◽  
Nomina Dubia

Vertebrate ichnotaxa described by George Frederic Matthew in 1910 from the Upper Carboniferous (Lower Pennsylvanian) ‘Fern Ledges’ of Saint John, New Brunswick, were dismissed as dubious trackways by previous authors. Thus, three new ichnospecies Matthew described appeared in the 1975 Treatise on Invertebrate Paleontology as “unrecognized or unrecognizable” and were mostly forgotten by vertebrate ichnologists. These traces include Hylopus (?) variabilis, Nanopus (?) vetustus and Bipezia bilobata. One ichnospecies, Hylopus (?) variabilis, here is retained as a valid tetrapod footprint ichnotaxon and reassigned to the ichnogenus Limnopus as a new combination, together with other poorly preserved specimens Matthew labeled, but never described. Nanopus (?) vetustus and Bipezia bilobata named by Matthew in the same paper, have been reexamined and remain as nomina dubia. 

Walking trails of the giant terrestrial arthropod Arthropleura from the Upper Carboniferous of Kentucky

2009 ◽  
Vol 83 (1) ◽  
pp. 140-146
Author(s):  
Ronald L. Martino ◽  
Stephen F. Greb
Keyword(s):  
New Mexico ◽  
Nova Scotia ◽  
North America ◽  
New Brunswick ◽  
Early Permian ◽  
Upper Carboniferous ◽  
Terrestrial Arthropods

Arthropleurids Were terrestrial, millipede-like arthropods, The genus Arthropleura Jordan from the Upper Carboniferous reached an enormous size of 2 m or more in length (Hahn et al., 1986), Occurrences are rare and the chronologie and paleogeographic distribution of Arthropleura coincides with the tropical Euramerican floral belt of the Carboniferous (Rolfe , 1969), The Carboniferous was a time of high atmospheric O2 levels (35%) compared to the current 21%, which may have favored the development of large terrestrial arthropods of this time (Dudley, 1998; Graham et al., 1997; Berner, 2001) . Body fossils of Arthropleura range from the Visean to Early Permian (Rolfe, 1969; Schneider and Barthel, 1997), while trackways have been reported from the Visean (Pearson, 1992) to Stephanian (Langiaux and Sotty, 1977; Castro, 1997; Fig. 1). Arthropleura fragments have been described from Ohio, Pennsylvania, Illinois, and Nova Scotia. Only four Arthropleura trackway sites have been described from North America (New Mexico, Kansas, Nova Scotia, and New Brunswick ). Trackways provide information about size and locomotion that is not discernable from fragmentary body fossils .

Chemistry and prehnite–pumpellyite facies metamorphism of calc-alkaline Carboniferous volcanic rocks of southeastern New Brunswick

1979 ◽  
Vol 16 (5) ◽  
pp. 1071-1085 ◽  
Author(s):  
D. F. Strong ◽  
W. L. Dickson ◽  
R. K. Pickerill
Keyword(s):  
New Brunswick ◽  
Volcanic Rocks ◽  
Sedimentary Rocks ◽  
Calc Alkaline ◽  
Upper Carboniferous ◽  
Geological Setting ◽  
Quantitative Estimates ◽  
Chemical Transfer ◽  
Facies Metamorphism ◽  
The City

Mafic pillowed and massive lavas of the Upper Carboniferous West Beach Formation, as exposed in the city of Saint John, southeastern New Brunswick, were metamorphosed under prehnite–pumpellyite facies conditions, possibly between 315 and 370 °C and 1 and 2.5 kbar (105 and 2.5 × 105 kPa). Petrographic and chemical data for 32 samples indicate that this metamorphism was accompanied by significant silicification of some samples and variable chloritization of most. These processes caused relatively minor chemical transfer of most elements other than silica, and calculations from averages assuming constant Al indicate that TiO2, P2O5, Zr, Rb, Nb, Ga, and Y are relatively immobile. However, ratio diagrams show anomalous concentrations of these elements in a few samples and illustrate the inherent flaws of quantitative estimates based on averages. Classifications using these elements in a variety of diagrams clearly and consistently indicate a primitive calc-alkaline nature for the lavas, contrary to what might be expected from their geological setting interbedded with plant-bearing paralic or continental sedimentary rocks.

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