Devonian faunas of the Sainte-Hélène Island breccia, Montréal, Quebec, Canada

1986 ◽  
Vol 23 (12) ◽  
pp. 2047-2056 ◽  
Author(s):  
A. J. Boucot ◽  
Carlton E. Brett ◽  
W. A. Oliver Jr. ◽  
Robert B. Blodgett
Keyword(s):  
New York ◽  
North America ◽  
Middle Devonian ◽  
The South ◽  
Rock Types ◽  
Acadian Orogeny ◽  
First Time

Early and Middle Devonian fossils from the Sainte-Hélène Island diatreme breccias are criticially reviewed and analyzed stratigraphically. They include marine benthic faunas of Helderberg, Oriskany, Schoharie, Onondaga, and Hamilton ages. Brachiopods are the most abundant fossils; significant corals are also present and are discussed for the first time. These diatreme faunas from the Montréal region significantly augment the lithofacies–paleogeographic data known for this part of North America. For the first time, attention is paid to the lithologies in which the Sainte-Hélène Island faunas are embedded, as clues to the regional relations of these rock types. The absence of Silurian specimens is ascribed to nondeposition similar to that known in the Albany, New York, region to the south. The presence of marine, Hamilton age rocks and fossils at Montréal shows that the Acadian Orogeny and uplift into the nonmarine environment did not affect the area until at least some time in the Hamilton.

A unique occurrence of Endophyllum (rugose coral; Devonian) in eastern North America: An ecological and biogeographical puzzle

1996 ◽  
Vol 70 (1) ◽  
pp. 46-56 ◽  
Author(s):  
William A. Oliver ◽  
James E. Sorauf ◽  
Carlton E. Brett
Keyword(s):  
New York ◽  
New Species ◽  
North America ◽  
Middle Devonian ◽  
Eastern North America ◽  
Old World ◽  
Rugose Coral ◽  
Large Colony ◽  
First Time

Endophyllum is described for the first time from North America. The occurrence of a single, large colony in Middle Devonian strata in New York is both biogeographically and environmentally anomalous: it belongs to an Old World Realm genus but was found in the Eastern Americas Realm, and it occurred in a gray, ambocoeliid-bearing mudstone, a facies in which morphologically complex corals are otherwise unknown. Available evidence suggests that the coral lived not far from where it was found, possibly on a hardground or bank a few km north of the outcrop. Endophyllum ciurcai new species is described.

Delthyris sculptilis Hall, 1843 (Brachiopoda) from the Middle Devonian Hamilton Group is a Megakozlowskiella

1986 ◽  
Vol 60 (4) ◽  
pp. 965-967
Author(s):  
William F. Koch
Keyword(s):  
New York ◽  
North America ◽  
Middle Devonian ◽  
Eastern North America ◽  
Upper Limit ◽  
Hamilton Group

Delthyris sculptilis Hall, 1843, from the Middle Devonian Hamilton Group of New York and equivalent rocks elsewhere in eastern North America, has long been assigned to the genus Delthyris or, in certain older studies, to the genus Spirifer. Recent restudy of this brachiopod shows that it belongs to the genus Megakozlowskiella Boucot, 1962. This extends the upper limit of Megakozlowskiella from the Eifelian (Southwood Stage, Onondaga Limestone in New York) to the Givetian (Tioughnioga Stage, Moscow Formation of the Hamilton Group in New York).

Transcurrent motion determined paleomagnetically in the Northern Appalachians and Caledonides and the Acadian Orogeny

1976 ◽  
Vol 13 (9) ◽  
pp. 1236-1243 ◽  
Author(s):  
W. A. Morris
Keyword(s):  
North America ◽  
Middle Devonian ◽  
Lower Devonian ◽  
Upper Devonian ◽  
Paleomagnetic Data ◽  
Taconic Orogeny ◽  
Paleomagnetic Poles ◽  
Acadian Orogeny ◽  
Opening And Closing

After correction for Mesozoic and Tertiary opening of the Atlantic, Ordovician and Silurian – Lower Devonian paleomagnetic poles from Britain are significantly different to contemporaneous results from North America. Upper Devonian poles from the two regions are similar. The discrepancy observed in the Ordovician and Silurian – Lower Devonian data is interpreted as due to major sinistral transcurrent faulting during the Middle Devonian concurrent with the short lived Acadian Orogeny. Rate of motion on this fault (or faults) was approximately 9 ± 4 cm/y. A consequence of this interpretation is that the Caledonide ocean was apparently narrow during the interval Ordovician to Devonian. However, inaccuracies in the paleomagnetic data permit the opening and closing of small ocean basins (≤ 1000 km), which may be related to the more extended Taconic Orogeny.

Well-preserved specimens of the sponges Gondekia (Heteractinida) and Pseudohydnoceras (Hexactinellida), Middle Devonian of New York State

1994 ◽  
Vol 68 (4) ◽  
pp. 727-734
Author(s):  
J. Keith Rigby
Keyword(s):  
New York ◽  
Middle Devonian ◽  
New York State ◽  
York State ◽  
First Time

Part and counterpart of a well-preserved specimen of Gondekia lancifer (Reimann, 1945a), and a well-preserved specimen of Pseudohydnoceras erraticum Reimann, 1935, are described from the Wanakah Member of the Middle Devonian, Givetian, Ludlowville Formation, of western New York State. The specimen of Gondekia is only the second articulated specimen known and is more complete than the holotype. It has an intact skeleton of felted sexiradiates of three orders of spicules; the largest has rays approximately 2 mm long. The specimen of Pseudohydnoceras has preserved hexactine-based spicules in a dictyid skeleton, described for the species for the first time.

Taxonomic revision of Hyolitha from the middle Paleozoic of North America

1987 ◽  
Vol 61 (6) ◽  
pp. 1173-1186 ◽  
Author(s):  
John M. Malinky ◽  
Robert M. Linsley ◽  
Ellis L. Yochelson
Keyword(s):  
New York ◽  
North America ◽  
Middle Devonian ◽  
New Genus ◽  
Taxonomic Revision ◽  
Type Specimens ◽  
Middle Paleozoic

Collection of over a dozen specimens of Hyolithes aclis Hall from the Middle Devonian of New York indicates that this species belongs to a new genus, Hallotheca, to which the species Hyolithes halli (Hall) is also assigned. However, the generic assignments of the Silurian species Hyolithes cliftonensis Foerste and the Devonian species H. centennialis Barrett, H. ceratophilus Clarke, H. neapolis Clarke, and H. triliratus Hall are uncertain because of poor preservation of their type specimens. Use of these names should be confined to the types until better preserved topotypes become available. Finally, H. cooperi (Williams) consists of organisms of uncertain affinities, and the type of H. principalis Hall may be a fragment of Devonian sandstone rather than an organism.

NEARCTIC RECORDS OF TWO EUROPEAN SPECIES OF PTEROMALIDAE (HYMENOPTERA: CHALCIDOIDEA)

1974 ◽  
Vol 106 (6) ◽  
pp. 623-625 ◽  
Author(s):  
Oswald Peck
Keyword(s):  
New York ◽  
British Columbia ◽  
North America ◽  
White Birch ◽  
European Species ◽  
First Time

AbstractTwo chalcidoid species, previously known only from Europe, are reported from North America for the first time. Habritys brevicornis (Ratz.) occurs in Quebec, Ontario, and British Columbia. Psilonotus achaeus Wlk. (= Eutelus betulae Grit., new syn.) occurs in Ontario, New York, and Michigan; it parasitizes Oligotrophus betulae Winn. (Cecidomyiidae) in seed of white birch.

Conodonts from the Prout Dolomite of north-central Ohio and Givetian (upper Middle Devonian) correlation problems

1999 ◽  
Vol 73 (5) ◽  
pp. 892-907 ◽  
Author(s):  
Dale R. Sparling
Keyword(s):  
New York ◽  
New Species ◽  
North America ◽  
Middle Devonian ◽  
Taxonomic Status ◽  
Middle Part ◽  
North Central ◽  
Continuous Sedimentation ◽  
Stratotype Section ◽  
A New Species

The Prout Dolomite of north-central Ohio lies disconformably above the lowest Givetian (upper Middle Devonian) Plum Brook Shale and below the lowest Famennian (upper Upper Devonian) Ohio Shale. A sample from its base yielded over 4,000 diverse conodont specimens. Included isPolygnathus ansatusZiegler and Klapper, 1976, the index species for the MiddlevarcusSubzone, which is not reported from strata of this age in Ontario and Indiana, a fact that long caused their miscorrelation with the LowervarcusSubzone. Also present isP. rhenanusKlapper, Philip, and Jackson, 1970, considered to be also indicative of the MiddlevarcusSubzone in North America, andP. ovatinodosusZiegler and Klapper, 1976. Lowest occurrences of the latter are in the middle part of this subzone; its presence indicates correlation with the lower Tully Limestone of New York, the basal unit of the Taghanic Series. The Prout and equivalent strata in the region therefore represent a long unrecognized continuous time-rock unit created by Johnson's (1970) Taghanic onlap. The collection includes a new species ofAncyrolepis, A. huntleyi; a new species ofPolygnathusis left in open nomenclature, as are nine specimens assigned toTortodusbut of otherwise uncertain taxonomic status.Givetian conodont correlation between North America and the Global Stratotype Section and Point established by the Subcommission on Devonian Stratigraphy (SDS) in Morocco is extremely problematical because of relatively erratic distribution (probably owing to limited ecologic adaptability) ofP. ansatusandP. hemiansatusBultynck, considered herein to be an early morphotype ofP. ansatus.The base of the Givetian Stage has been defined by the SDS as coinciding with the lowest occurrence ofP. hemiansatus.The only possible evidence for the SDS'shemiansatusZone in North America involves reported occurrence of that morphotype in the uppermost Arkona Shale of Ontario, a position above the top of the Plum Brook Shale, which has been considered to be of Givetian age for decades. Also it appears that the interval between the Eifelian (lower Middle Devonian)kockelianusZone and thehemiansatusZone at the SDS's global-stratotype section in Morocco is of questionable age and probably too thin to represent continuous sedimentation. Adoption of a widely recognized faunal break at the base of strata deposited during the If T-R cycle of North America and Europe as the base of the Givetian could provide a sound alternative.

XXVIII.—On the Presence of Tetrads of Resistant Spores in the Tissue of Sporocarpon furcatum Dawson from the Upper Devonian of America

1925 ◽  
Vol 53 (3) ◽  
pp. 597-601 ◽  
Author(s):  
R. Kidston ◽  
W. H. Lang
Keyword(s):  
New York ◽  
North America ◽  
Black Shale ◽  
Black Shales ◽  
Upper Devonian ◽  
The South ◽  
Large Area ◽  
Lower Carboniferous ◽  
Red Sandstone ◽  
Western Border

The deposits of the Devonian period over a large area in the interior of North America to the south of the great lakes are known to be wholly of marine type and to have continued those of the Silurian period. They were formed in a great gulf open to the south. Along the western border of this gulf shore-deposits and, during Upper Devonian times, deposits of Old Red Sandstone type were accumulated, while in the middle of the gulf the resulting rocks were limestones and shales. In Ohio, following on a narrow band of what is regarded as Oriskany Sandstone (Lower Devonian), the Corniferous limestone and some local representatives of the Hamilton formation represent the Middle Devonian. Above this comes a great mass of black shale, which here represents the whole Upper Devonian and may continue up into black shales of the Lower Carboniferous. A black shale at the base of the Upper Devonian rocks has an extensive range in the central region of North America, being represented by the Huron shale in Canada and the Genessee shale in New York. Drifted land plants from the coast of the gulf, or from islands in it, have been found in the black shale and also in the underlying Corniferous limestone, and some other fossils are commonly spoken of as Algæ but have afforded little or no botanical information.

Silurian and Devonian base maps

1985 ◽  
Vol 309 (1138) ◽  
pp. 57-77 ◽  
Keyword(s):  
Great Britain ◽  
North America ◽  
Middle Devonian ◽  
Northern Europe ◽  
Late Devonian ◽  
The South ◽  
Early Devonian ◽  
Red Sandstone ◽  
Palaeomagnetic Data

During the Silurian and Devonian, the sequence of continental collisions that were ultimately to result in the formation of the supercontinent of Pangaea had begun. By the Early to Middle Devonian North America (Laurentia), Acadia, Great Britain, and Northern Europe (Baltica) had collided to form the ‘Old Red Sandstone’ continent (Laurussia). Palaeomagnetic data, however, indicate that the configuration of the continents that made up Laurussia did not resemble the pre-breakup, Mesozoic reassembly. Rather, Britain, Baltica, and Acadia were displaced 10—20° to the south with respect to Laurentia. New palaeomagnetic data for Laurentia and Gondwana, suggests that the ocean separating the northern and southern continents was relatively narrow during the early Devonian, and may have been nearly closed by the late Devonian.

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