Distribution of deep-water corals along the North American continental margins: Relationships with environmental factors

2006 ◽  
Vol 53 (12) ◽  
pp. 1865-1879 ◽  
Author(s):  
Tanya L. Bryan ◽  
Anna Metaxas
Keyword(s):  
Environmental Factors ◽  
Deep Water ◽  
North American ◽  
Continental Margins ◽  
The North

Palaeo-oceanography, margin stratigraphy and palaeophysiography of the Tertiary North Atlantic and Norwegian-Greenland seas

1980 ◽  
Vol 294 (1409) ◽  
pp. 177-185 ◽  
Keyword(s):  
North Atlantic ◽  
Deep Water ◽  
Global Climate ◽  
Circulation Pattern ◽  
The Arctic ◽  
Continental Margins ◽  
Long Distance ◽  
Sea Level Fluctuations ◽  
The North ◽  
Border Zones

The Tertiary was a period of dramatic changes of the palaeo-oceanography of the world’s oceans in general and of the North Atlantic in particular. These changes were caused by (1) the bathymetric evolution of ocean basins and intrabasin pathways (opening of the Norwegian-Greenland Seas and of the pathway to the Arctic Ocean, interruption of the circumglobal equatorial seaway); (2) the geographical development of the oceans and adjacent marginal basins in the context of rapid and intensive eustatic sea level fluctuations; and (3) the deterioration of the global climate throughout the Tertiary (change from a non-glacial to a glacial world, causing major changes in circulation of the surface and deep water). A biostratigraphy of Tertiary sediments deposited close to the continental margins has been developed by using remains of planktonic floras and faunas. Their presence in these sediments and their usefulness for long distance correlations of margin sediments, depend upon the circulation pattern and hydrographic gradients of the oceanic surface and deep water masses, the climatic regime over the continental border zones, and the probability of their post-depositional preservation.

Miogeoclines and suspect terranes of the Caledonian–Appalachian Orogen: tectonic patterns in the North Atlantic region

1984 ◽  
Vol 21 (8) ◽  
pp. 887-901 ◽  
Author(s):  
Harold Williams
Keyword(s):  
North Atlantic ◽  
North American ◽  
North Atlantic Ocean ◽  
Continental Margins ◽  
British Isles ◽  
The North ◽  
Northwest Africa ◽  
Iapetus Ocean ◽  
Appalachian Orogen ◽  
The North Atlantic

The Caledonian–Appalachian Orogen was formed by the closing of a Paleozoic Iapetus Ocean. The continental margins of Iapetus are identified in the deformed early Paleozoic miogeoclines of the Caledonian–Appalachian Orogen. Ophiolitic vestiges of Iapetus, its oceanic plateaus, microcontinents, and volcanic arcs are Caledonian–Appalachian suspect terranes. These were assembled in interior parts of the orogen and locally they were emplaced structurally upon the adjacent miogeoclines.The modern North Atlantic Ocean opened along an axis that traversed the Paleozoic orogen longitudinally. Its opening dispersed the elements of the Paleozoic orogen and led to the present arrangement of disjunct Paleozoic miogeoclines and suspect terranes throughout the North Atlantic borderlands.The western or North American margin of Iapetus is represented by the miogeoclines along the west flank of the North American Appalachians and Caledonides of east Greenland. A small North American miogeoclinal segment occurs in the British Isles, and suspect terranes with North American faunal affinities occur in Scandinavia. The eastern margin of Iapetus is represented by the miogeoclines of the Scandinavian Caledonides and the Mauritanides of northwest Africa. Ophiolitic vestiges of Iapetus and suspect terranes occur in the Appalachians, the Caledonides of Scandinavia and the British Isles, and the Variscan foldbelt of Morocco, Iberian Peninsula, and western France.In the scenario of a closing Iapetus and opening North Atlantic, the Paleozoic margin of eastern North America expanded by the acquisition of Appalachian suspect terranes, the Paleozoic margins of Greenland and Scandinavia remained essentially unchanged, and Africa lost parts of its Paleozoic margin.Modern continental margins and the geometry of the North Atlantic mimic Paleozoic miogeoclines and the geometry of Iapetus. The Paleozoic miogeoclines, in turn, follow Grenvillian deformed zones of the Precambrian North Atlantic craton. Thus, patterns for the opening of the North Atlantic may have been set by the geometry of the Grenvillian deformed zones.

scholarly journals Three-dimensionally preserved specimens of Amplexograptus (Ordovician, Graptolithina) from the North American mid-continent: taxonomic and biostratigraphic significance

2002 ◽  
Vol 76 (5) ◽  
pp. 921-927 ◽  
Author(s):  
Daniel Goldman ◽  
Shannon M. Campbell ◽  
Jeffrey M. Rahl
Keyword(s):  
North American ◽  
Single Species ◽  
Black Shales ◽  
Continental Margins ◽  
Upper Ordovician ◽  
The North ◽  
Specific Variation

Graptolites are relatively uncommon fossils in the Middle and Upper Ordovician carbonates of the North American mid-continent. With the notable exception of the Viola Springs Formation in Oklahoma, most units contain a single species, which occur within narrow stratigraphic intervals (often single beds). While uninteresting in terms of their diversity, these monospecific collections commonly yield excellent three-dimensionally preserved specimens that can be isolated from their matrix and studied. In particular, the large number of well-preserved specimens allows for accurate evaluations of intra-specific variation and reliable descriptions of taxa that are generally known from flattened or otherwise distorted material. Additionally, these graptolite collections can provide important biostratigraphic ties between disparate facies—shallow mid-continental limestones and the deeper-water black shales characteristic of continental margins.

scholarly journals First Specimens of the Marine Eels Venefica ocella and V. tentaculata (Nettastomatidae) from British Columbia

2013 ◽  
Vol 126 (3) ◽  
pp. 210 ◽  
Author(s):  
Gavin F. Hanke ◽  
Steven M. Roias
Keyword(s):  
British Columbia ◽  
Deep Water ◽  
North American ◽  
Pacific Coast ◽  
Survey Sampling ◽  
Bottom Trawl ◽  
The North ◽  
Deep Water Species ◽  
By Catch ◽  
Water Species

Until recently, only the following seven species of marine eels were known to exist in waters off British Columbia (based on literature sources and museum records): Nemichthys scolopaceus, and Avocettina infans (Nemichthyidae, snipe eels), Xenomystax atrarius (Congridae, conger eels), Serrivomer jesperseni (Serrivomeridae, sawtooth eels), Cyema atrum (Cyematidae, bobtail eels), Synaphobranchus affinis (Synaphobranchidae, cutthroat eels), and Thalassenchelys coheni (Colocongridae, worm eels). Histiobranchus bathybius (also in the Synaphobranchidae) is expected to occur in British Columbia, since its range extends from Mexico to Alaska. Recent surveys to determine the viability of crab fisheries facilitated the collection of non-game fishes from by-catch in bottom-trawl samples. Several eels were collected between 2004 and 2006, and they were originally identified as Serrivomer jesperseni (Serrivomeridae). Re-examination of these specimens indicates that they all are duckbill eels (Nettastomatidae), the first records of this family north of 45°39'N along the North American Pacific coast. Both Venefica ocella and V. tentaculata are represented, with V. ocella found farther north than V. tentaculata. All British Columbia specimens are housed at the Royal British Columbia Museum. The collection of new deep-water species in British Columbia reinforces the value of survey sampling to improve our knowledge of biodiversity.

scholarly journals Late Viséan (late Mississippian) ammonoids from the Barnett Shale, Sierra Diablo Escarpment, Culberson County, Texas, USA

Fossil Record ◽  
2015 ◽  
Vol 18 (2) ◽  
pp. 81-104 ◽  
Author(s):  
A. L. Titus ◽  
D. Korn ◽  
J. E. Harrell ◽  
L. L. Lambert
Keyword(s):  
New Species ◽  
Deep Water ◽  
North American ◽  
Foreland Basin ◽  
North American Species ◽  
Barnett Shale ◽  
South Urals ◽  
New Genera ◽  
The North ◽  
Offshore Sediments

Abstract. Mid-Carboniferous strata of the Barnett Shale in the Sierra Diablo region are deep water, offshore sediments deposited in the Marathon Foreland Basin. These strata contain a remarkably complete ammonoid record spanning from the Late Viséan to the middle Atokan (Moscovian). Late Viséan strata are referred to as the "Folks Member" of the Barnett Shale and locally yield numerous ammonoids. Three assemblages can be recognized, which contain, from oldest to youngest, Goniatites eganensis and Girtyoceras hamiltonense (Goniatites eganensis Zone), Goniatites multiliratus and Girtyoceras meslerianum (Goniatites multiliratus Zone), and Choctawites cumminsi and Pachylyroceras cloudi (Choctawites cumminsi Zone). We erect the new genera Choctawites and Uralyroceras to accommodate, respectively, the North American species "Goniatites choctawensis Shumard, 1863", "G. kentuckiensis Miller, 1889" and "G. cumminsi Hyatt, 1893", and Uralian species formerly attributed to Pachylyroceras. For the material of "Pachylyroceras cloudi" of the South Urals, the new species name Uralyroceras arquatum is proposed.

1588: The Bicalutamide Early Prostate Cancer Program: Findings of the North American Trial at 7.7 Years' Median Follow-Up

2006 ◽  
Vol 175 (4S) ◽  
pp. 511-512
Author(s):  
David G. McLeod ◽  
Ira Klimberg ◽  
Donald Gleason ◽  
Gerald Chodak ◽  
Thomas Morris ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
North American ◽  
Early Prostate Cancer ◽  
The North ◽  
Cancer Program
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