Invertebrate trace fossils and agglutinated foraminifera as indicators of marine influence within the classic Carboniferous section at Joggins, Nova Scotia, Canada

1995 ◽  
Vol 32 (12) ◽  
pp. 2027-2039 ◽  
Author(s):  
Allen W. Archer ◽  
John H. Calder ◽  
Martin R. Gibling ◽  
Robert D. Naylor ◽  
Donald R. Reid ◽  
...  
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Brackish Water ◽  
Eastern North America ◽  
Fluvial Systems ◽  
Biogenic Structures ◽  
Water Conditions ◽  
Marine Influence ◽  
New Evidence ◽  
Agglutinated Foraminifera

The sea cliffs at Joggins, Nova Scotia, are the most extensive and continuous Carboniferous section in eastern North America. Although the section has been considered to have formed within a nonmarine depositional basin, paleobiological information indicates that parts of the section were deposited in brackish water. The occurrence of a trace-fossil assemblage, which includes Cochlichnus, Kouphichnium, and Treptichnus, is part of an assemblage of biogenic structures that apparently reflects paleodeposition within fluvial systems that may have experienced distal marine influences. Presence of agglutinated foraminifera characteristic of brackish-water environments supports this interpretation. This information provides new evidence of brackish-water conditions at Joggins such as those now being widely recognized in other Carboniferous coal-bearing sections.

Isthmiella faullii. [Descriptions of Fungi and Bacteria].

1984 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Geographical Distribution ◽  
New Hampshire ◽  
Abies Balsamea ◽  
Eastern North America ◽  
Northern Ontario ◽  
Needle Blight ◽  
Juvenile Plants

Abstract A description is provided for Isthmiella faullii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Apparently confined to Abies balsamea. DISEASE: Causes a needle blight of Abies balsamea. According to Darker (1932), it 'is the commonest and most destructive of the Hypodermataceae on Abies balsamea in eastern North America'. It is particularly damaging to seedlings and juvenile plants. In northern Ontario, from where the disease was originally identified, infection occurs during the summer, but signs of the disease do not appear until the following spring, when needles become brown and conidiomata develop, conidia being discharged in July, and shortly after this ascomata begin to form, maturing in July of the following year. GEOGRAPHICAL DISTRIBUTION: Reported from Canada: Nova Scotia, Ontario, Quebec and USA: Michigan and New Hampshire. TRANSMISSION: Through air dispersal of ascospores, which directly infect the leaves (Darker, 1932).

THE NYMPH OF AESCHNA VERTICALIS HAGEN

1941 ◽  
Vol 73 (12) ◽  
pp. 229-231 ◽  
Author(s):  
E. M. Walker
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Eastern North America

Aeschna verticalis Hagen has been for some years the only species of the genus from eastern North America, whose nymph was unknown, except the rare A. mutata Hagen. At last, unexpectedly, the writer found A. verticalis in transformation at Clementsport, Annapolis Co., Nova Scotia.

Early Agricultural Diet in Eastern North America: Evidence from Two Kentucky Rockshelters

1996 ◽  
Vol 61 (3) ◽  
pp. 520-536 ◽  
Author(s):  
Kristen J. Gremillion
Keyword(s):  
Quantitative Analysis ◽  
North America ◽  
Food Production ◽  
Empirical Support ◽  
Causal Link ◽  
Woodland Period ◽  
Food Storage ◽  
Eastern North America ◽  
Eastern Kentucky ◽  
New Evidence

Systematic quantitative analysis of desiccated human paleofeces from two rockshelters in eastern Kentucky has yielded new evidence for early agricultural diet in eastern North America. Results indicate that native cultigens (including sumpweed, sunflower, and chenopod) were sometimes significant dietary constituents as early as ca. 1000 B.C., at least a millennium before agricultural economies became widespread across the region. However, variability in the quantity and frequency of cultigen remains suggests a dietary role that was somewhat limited compared to the practices of later Woodland period farmers. The predictions of foraging theory suggest that the utilization of cultigens would have been most advantageous in spring and summer (when many other foods were scarce) or in years of poor production by nut-bearing trees. The causal link between food storage and the development of food production in eastern Kentucky receives some empirical support and warrants further investigation.

Isoetes acadiensis, a new species from eastern North America

1981 ◽  
Vol 59 (12) ◽  
pp. 2592-2594 ◽  
Author(s):  
L. S. Kott
Keyword(s):  
New Species ◽  
Nova Scotia ◽  
North America ◽  
Chromosome Number ◽  
Eastern North America ◽  
A New Species

A new species of Isoetes, Isoetes acadiensis, from North America is described. The particular combination of characters of microspore and megaspore ornamentation, spore sizes, and chromosome number separates this species well from all existing species. Its range is restricted to the northeastern seaboard of North America and it occurs most commonly in Nova Scotia.

Diptera communities of raptor (Aves) nests in Nova Scotia, Canada

2020 ◽  
Vol 152 (3) ◽  
pp. 342-354
Author(s):  
Valerie Levesque-Beaudin ◽  
Bradley J. Sinclair ◽  
Stephen A. Marshall ◽  
Randolph F. Lauff
Keyword(s):  
Nova Scotia ◽  
North America ◽  
New Records ◽  
Eastern North America ◽  
Nest Material ◽  
Cavity Nesting

AbstractThe identity, richness, and abundance of true flies (Diptera) from the nests of three cavity-nesting raptors (Aves) were investigated in northern Nova Scotia, Canada. After fledging, flies were extracted from the nest material using Berlese funnels within an emergence chamber. Thirty-one species/morphospecies from 14 families were collected, including eight new records for Nova Scotia and two new records for eastern North America.

Taxonomy and distribution of Atriplex species in Nova Scotia

1972 ◽  
Vol 50 (7) ◽  
pp. 1571-1594 ◽  
Author(s):  
P. M. Taschereau
Keyword(s):  
New Species ◽  
Nova Scotia ◽  
North America ◽  
Chromosome Numbers ◽  
Breeding Systems ◽  
Eastern North America ◽  
Systems Ecology ◽  
Two New Species ◽  
Specific Rank ◽  
American Authors

A biosystematic study of the genus Atriplex, based on field, herbarium, culture, and cytological work delineates the taxa of this genus occurring in Nova Scotia. The study gives detailed morphological descriptions of eight species, and reports their chromosome numbers, breeding systems, ecology, and distribution. Atriplex patula L., A. hastata L., A. littoralis L., and A. glabriuscula Edmondston, considered as varieties of A. patula by recent North American authors, are given specific rank. The name Atriplex hastata L. is found to be misapplied. The correct name for this taxon is Atriplex triangularis Willdenow. Two new species—Atriplex acadiensis, a tetraploid, and A. Franktonii, a diploid—are described. A hexaploid species, A. subspicata (Nutt.) Rydb., not previously recognized from eastern North America, is reported. M. L. Fernald's report of A. patula var. bracteata Westerlund from Nova Scotia is shown to be based on an incorrect determination. Atriplex glabriuscula var. oblanceolata Vict. & Rousseau, and A. patula var. bracteata Westerlund are relegated to synonymy.

Meguma terrane orocline: U-Pb age and paleomagnetism of the Silurian Mavillette gabbro, Nova Scotia, Canada

2020 ◽  
Author(s):  
Halima Sadia Warsame ◽  
Phil J.A. McCausland ◽  
Chris E White ◽  
Sandra M. Barr ◽  
Greg R. Dunning ◽  
...  
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Tectonic Evolution ◽  
Volcanic Rocks ◽  
Late Carboniferous ◽  
Early Devonian ◽  
Rock Formation ◽  
Metasedimentary Rocks ◽  
Meguma Terrane ◽  
New Evidence

Paleomagnetic results and a U-Pb baddeleyite age from the Silurian Mavillette gabbroic sill in southwest Nova Scotia provide new evidence about the Paleozoic tectonic evolution of the Meguma terrane. The Mavillette gabbro sill intruded ca. 440-430 Ma bimodal rift-related metavolcanic and metasedimentary rocks of the White Rock Formation in the Silurian-Devonian Rockville Notch Group. The 426.4±2.0 Ma Mavillette gabbro age is notably younger than the ca. 440 Ma magmatism, but is part of a geochemically-defined suite of within-plate sills and volcanic rocks of the Rockville Notch Group with ages as young as Early Devonian. Paleomagnetic investigation of thirteen sites distributed along the Neoacadian (ca. 390 Ma) synclinal limbs of the Mavillette sill reveal magnetization directions that fail a fold test and therefore postdate Silurian emplacement of the gabbro. The post-folding remanence has a mean direction of D=153.4, I=17.1°; α95=6.5° (n=12 sites), with corresponding paleopole 31.9°S, 325.2 E; dp=3.5°, dm=6.7° that resembles a pervasive Late Carboniferous Kiaman overprint magnetization in North America, but is rotated significantly 22.2°±8.1° counter-clockwise (CCW). Mavillette remanence acquisition likely occurred in concert with fluid mobilization related to Alleghanian deformation, recorded locally by ca. 320 Ma muscovite 40Ar-39Ar ages. Previously published paleomagnetic results from the Meguma terrane also have Carbonifereous remanence directions with similar ~24° CCW discordance. The regional CCW rotation of the southwest Meguma terrane post-dates this ca. 320 Ma tectonothermal remanence acquisition event, likely recording the development of an oroclinal bend of the Meguma terrane during Alleghanian orogeny.

scholarly journals Assembly of the eastern North American herpetofauna: new evidence from lizards and frogs

2006 ◽  
Vol 2 (3) ◽  
pp. 388-392 ◽  
Author(s):  
J Robert Macey ◽  
James A Schulte ◽  
Jared L Strasburg ◽  
Jennifer A Brisson ◽  
Allan Larson ◽  
...  
Keyword(s):  
North America ◽  
North American ◽  
Eastern North America ◽  
Land Bridge ◽  
Dna Evidence ◽  
Bering Land Bridge ◽  
Biotic Diversity ◽  
Almost All ◽  
Dispersal Events ◽  
New Evidence

Darwin first recognized the importance of episodic intercontinental dispersal in the establishment of worldwide biotic diversity. Faunal exchange across the Bering Land Bridge is a major example of such dispersal. Here, we demonstrate with mitochondrial DNA evidence that three independent dispersal events from Asia to North America are the source for almost all lizard taxa found in continental eastern North America. Two other dispersal events across Beringia account for observed diversity among North American ranid frogs, one of the most species-rich groups of frogs in eastern North America. The contribution of faunal elements from Asia via dispersal across Beringia is a dominant theme in the historical assembly of the eastern North American herpetofauna.

LATE ARCHAIC RITUALISM IN DOMESTIC CONTEXTS: CLAY-FLOORED SHRINES AT THE BURRELL ORCHARD SITE, OHIO

2017 ◽  
Vol 82 (4) ◽  
pp. 683-701 ◽  
Author(s):  
Brian G. Redmond
Keyword(s):  
North America ◽  
Past Research ◽  
Stone Tool ◽  
Eastern North America ◽  
Late Archaic ◽  
Short Term ◽  
Monumental Architecture ◽  
The Many ◽  
New Evidence

Past research on the development of Archaic ideological complexity in eastern North America has focused on ritualism and ceremony related to mortuary behaviors, with less attention to ritualism within what is commonly thought of as domestic contexts without overt mortuary ceremonialism or monumental architecture. The recent discovery of puddled clay architecture and associated features at the Burrell Orchard site (33LN15) in northeast Ohio provides new evidence of significant, nonmortuary ritualism within Late Archaic basecamp contexts. That such activity took place alongside normal seasonal subsistence tasks is revealed by thick midden deposits containing abundant burned rock, nutshell, and deer bone. The many bone and stone tool deposits associated with the floors, along with the labor-intensive nature of the clay construction for what appears to have been individually short-term use, support the interpretation of these features as shrines possibly associated with hunting ritualism.

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