scholarly journals An Upper Carboniferous trigonotarbid, Aphantomartus pustulatus (Scudder, 1884), from the Maritimes Basin (Euramerican Coal Province), New Brunswick, Canada

10.4138/1979 ◽  
2001 ◽  
Vol 37 (2) ◽  
Author(s):  
R. F. Miller ◽  
W. H. Forbes
Keyword(s):  
New Brunswick ◽  
Upper Carboniferous ◽  
Maritimes Basin

Sequence stratigraphy of the late Carboniferous Clifton Formation, New Brunswick

2020 ◽  
Vol 57 (11) ◽  
pp. 1289-1304
Author(s):  
Brandon M. Keough ◽  
Olivia A. King ◽  
Matthew R. Stimson ◽  
Page C. Quinton ◽  
Michael C. Rygel
Keyword(s):  
New Brunswick ◽  
Sediment Supply ◽  
Sequence Stratigraphic ◽  
Marine Strata ◽  
Stratigraphic Framework ◽  
Carbonaceous Shales ◽  
Study Interval ◽  
Maritimes Basin ◽  
Sequence Boundaries ◽  
Maximum Flooding Surface

The Maritimes Basin of Atlantic Canada contains a rich record of Pennsylvanian cyclothems. Previous studies have focused on rapidly subsiding depocenters in the central part of the basin where Carboniferous successions feature cyclic alternations between terrestrial and marginal marine strata. In contrast, the Pennsylvanian Clifton Formation was deposited on the relatively stable New Brunswick platform and contains almost entirely terrestrial strata. Although early studies of the Clifton Formation noted a cyclic architecture, particularly within Member B, this unit has remained understudied. We provide a sedimentological and sequence stratigraphic framework for the lower 85 m of Member B and interpret our results relative to a broader regional framework. Near the base of the study interval, the highstand systems tract is composed of red floodplain mudrocks; overlying sequence boundaries are composed of calcretes and (or) channels. The transgressive systems tract and maximum flooding surface are represented by coals and aquatic bivalve-bearing mudrocks. Moving upward through the section, the architecture of the highstand systems tract remains largely unchanged while sequence-bounding paleosols become less well developed, the transgressive systems tract becomes thinner and eventually not preserved, and the maximum flooding surface is only occasionally preserved, possibly represented by carbonaceous shales. These changes in cyclic architecture may be attributed to changes in the magnitude of glacioeustatic fluctuations, climate, and (or) the accommodation/sediment supply ratio. The results of this study show that the Clifton Formation represents the terrestrial/proximal endmember for cyclicity in the Maritimes Basin and provide new insight into paleotopography as a possible control on cyclothem architecture.

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.

New cuticular morphotypes of Cordaites principalis from the Canadian Carboniferous Maritimes Basin

2000 ◽  
Vol 78 (2) ◽  
pp. 135-148 ◽  
Author(s):  
Erwin L Zodrow ◽  
Zbynek Šimunek ◽  
Arden R Bashforth
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Grain Size ◽  
Thermal Maturity ◽  
Upper Carboniferous ◽  
Fossil Leaves ◽  
Maritimes Basin ◽  
Epidermal Morphology ◽  
Scanning Electron

Fossil cuticles were extracted from leaves attributed to Cordaites principalis (Germar) Geinitz (Cordaitales) that were collected from Upper Carboniferous strata in Nova Scotia (Sydney and Stellarton sub-basins) and in Newfoundland (Bay St. George sub-basin). The quality of the cuticular preservation is directly related to the thermal maturity and the grain size and angularity of sediments entombing the fossil leaves. Detailed transmitted light and scanning electron microscopy of the cuticles revealed that five distinct cuticular morphotypes could be recognized, demonstrating the variability in epidermal morphology of leaves belonging to one taxon. Two morphotypes show dissimilar and discrete epidermal characteristics, whereas three morphotypes form, more or less, a morphological continuum. Comparison with cuticles from Euramerican and Angaran floral provinces suggests that only one morphotype is in common with cuticles described from Europe, while four morphotypes are new for the Carboniferous.Key words: cuticle, Cordaites, Carboniferous, Canada.

Carboniferous tetrapod footprint biostratigraphy, biochronology and evolutionary events

2021 ◽  
pp. SP512-2020-235
Author(s):  
Spencer G. Lucas ◽  
Matthew R. Stimson ◽  
Olivia A. King ◽  
John H. Calder ◽  
Chris F. Mansky ◽  
...  
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Middle Devonian ◽  
Prince Edward Island ◽  
Early Permian ◽  
Eastern Canada ◽  
High Fiber ◽  
Maritimes Basin ◽  
Insight Into

AbstractThe Carboniferous record of tetrapod footprints is mostly of Euramerican origin and provides the basis for a footprint biostratigraphy and biochronology of Carboniferous time that identifies four tetrapod footprint biochrons: (1) stem-tetrapod biochron of Middle Devonian-early Tournaisian age; (2) Hylopus biochron of middle-Tournaisian-early Bashkirian age; (3) Notalacerta-Dromopus interval biochron of early Bashkirian-Kasimovian age; and (4) Dromopus biochron of Kasimovian-early Permian age. Particularly significant is the Carboniferous tetrapod footprint record of the Maritimes basin of eastern Canada (New Brunswick, Nova Scotia and Prince Edward Island), which encompasses well-dated and stratigraphically superposed footprint assemblages of Early Mississippian-early Permian age. The Carboniferous tetrapod footprint record provides these important biostratigraphic datums: (1) oldest temnospondyls (middle Tournaisian); (2) oldest reptiliomorphs, likely anthracosaurs (middle Tournaisian); (3) oldest amniotes (early Bashkirian); and (4) oldest high fiber herbivores (Bashkirian). Carboniferous tetrapod footprints thus provide significant insight into some major events of the Carboniferous evolution of tetrapods.

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