Journal ArticleDOI
Palaeoenvironments and palaeoecology of the Early Pennsylvanian Lancaster Formation (`Fern Ledges') of Saint John, New Brunswick, Canada
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The Pennsylvanian Lancaster Formation (Fern Ledges) of New Brunswick, Canada contains a world-famous fossil biota as mentioned in this paper, which has been largely unstudied since the works of Hartt, Dawson, Matthew, and Stopes.Abstract:
The Pennsylvanian Lancaster Formation (‘Fern Ledges’) of Saint John, New Brunswick, Canada contains a world-famous fossil biota. Largely unstudied since the works of Hartt, Dawson, Matthew, and Stopes in the mid-nineteenth to early twentieth century, we present new data concerning biostratigraphy, taxonomy, palaeoenvironments, and palaeoecology. Megafloral assemblages suggest a mid- to late Langsettian age for the succession, making it approximately coeval with the classic Joggins Formation of nearby Nova Scotia. Facies analysis suggests deposition on a tectonically influenced coastal plain whose braided channels drained into a shallow brackish gulf. Most of the historical fossil collections are derived from flooding surfaces formed by abrupt subsidence events along the coastline. Three communities are recognized. Phoronids, crustaceans, and xiphosurans lived in brackish coastal waters. A lowland community of gastropods, insects, arachnids, and myriapods inhabited coastal forests. Coastal vegetation was dominated by shrubby cordaitaleans and pteridosperms whereas ferns, sphenopsids, and lycopsids were rare. An upland or dryland community, discernible from allochthonous assemblages, comprised forests of giant cordaitaleans, archaic pteridosperms, and plants of uncertain affinity.read more
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Journal ArticleDOI
Cyclic changes in Pennsylvanian paleoclimate and effects on floristic dynamics in tropical Pangaea
William A. DiMichele,C. Blaine Cecil,C. Blaine Cecil,Isabel P. Montañez,Howard J. Falcon-Lang +4 more
TL;DR: Wetland floras narrowly define perceptions of Pennsylvanian tropical ecosystems, the so-called coal Age as discussed by the authors, and the importance of seasonally-dry vegetation has suffered from conceptual and terminological confusion.
Journal ArticleDOI
Pennsylvanian 'fossil forests' in growth position (T0 assemblages): origin, taphonomic bias and palaeoecological insights
TL;DR: Fossil forests, buried in growth position in a geological instant (T 0 assemblages) are far more abundant in Pennsylvanian successions than in any other part of the geological record as mentioned in this paper.
Book ChapterDOI
Chapter 6 The Maritimes Basin of Atlantic Canada: Basin Creation and Destruction in the Collisional Zone of Pangea
TL;DR: The Maritimes Basin of Atlantic Canada was tectonically active for ∼120myr from the mid-Devonian to the Early Permian, following terrane accretion and ocean closure in the region as mentioned in this paper.
Journal ArticleDOI
Paleoecology of Early Pennsylvanian vegetation on a seasonally dry tropical landscape (Tynemouth Creek Formation, New Brunswick, Canada)
Arden R. Bashforth,Arden R. Bashforth,Arden R. Bashforth,Christopher J. Cleal,Martin R. Gibling,Howard J. Falcon-Lang,Randall F. Miller +6 more
TL;DR: The distribution and community ecology of Early Pennsylvanian vegetation on a seasonally dry fluvial megafan is reconstructed from plant assemblages in the Tynemouth Creek Formation of New Brunswick, Canada.
Journal ArticleDOI
No major stratigraphic gap exists near the middle-upper pennsylvanian (desmoinesian-missourian) boundary in north america
Howard J. Falcon-Lang,Philip H. Heckel,William A. DiMichele,Bascombe M. Blake,Cary R. Easterday,Cortland F. Eble,Scott D. Elrick,Robert A. Gastaldo,Stephen F. Greb,Ronald L. Martino,W. John Nelson,Hermann W. Pfefferkorn,Tom L. Phillips,Steven J. Rosscoe +13 more
TL;DR: In this paper, a gap of no more than,600 kyr occurs elsewhere in the Appalachian Basin at that level and its magnitude progressively decreases westward into the Illinois (,300 kyr) and Midcontinent (,200 kyr), and it is typically more than an order of magnitude smaller than originally proposed and is similar to the gaps inferred at sequence boundaries between cyclothems at many horizons in the Pennsylvanian of North America.
References
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Book
The Descent of Man, and Selection in Relation to Sex
TL;DR: In this paper, secondary sexual characters of fishes, amphibians and reptiles are presented. But the authors focus on the secondary sexual characteristics of fishes and amphibians rather than the primary sexual characters.
Journal ArticleDOI
The Descent of Man, and Selection in relation to Sex
TL;DR: The Descent of Man, and Selection in relation to Sex as mentioned in this paper, by Charles Darwin, &c. In two volumes. Pp. 428, 475, as mentioned in this paper.
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Fabric and mineral analysis of soils
TL;DR: In this paper, Fabric and mineral analysis of soils, Fabric and Mineral Analysis of soils, مرکز فناوری اطلاعات و اسلاز رسانی, ک ǫ Ǫ ǔ ǒ ǩ ի
Journal ArticleDOI
Fluvial processes and facies sequences in the sandy braided South Saskatchewan River, Canada
Douglas J. Cant,Roger G. Walker +1 more
TL;DR: The South Saskatchewan River has a long term average discharge of 275 m3/sec, with flood peaks in the range of 1500 to 3800 m 3/sec as discussed by the authors, and the dominant channel bedforms are dunes, which deposit trough cross bedding.