Multielement Conodont Species and an Ecological Interpretation of the Lower Osagean (Lower Carboniferous) Conodont Zonation from Midcontinent North America

1983 ◽  
Vol 29 (4) ◽  
pp. 404 ◽  
Author(s):  
Karl M. Chauff
Keyword(s):  
North America ◽  
Lower Carboniferous ◽  
Conodont Zonation

Planalvus (Brachiopoda, Athyridida) from the Lower Devonian of the Armorican Massif, northwest France

1994 ◽  
Vol 68 (3) ◽  
pp. 451-460 ◽  
Author(s):  
Patrick R. Racheboeuf ◽  
Paul Copper ◽  
Fernando Alvarez
Keyword(s):  
New Species ◽  
North America ◽  
Lower Devonian ◽  
Eastern North America ◽  
Lower Carboniferous ◽  
Armorican Massif ◽  
A New Species

Cryptonella? cailliaudi Barrois, 1889, from the Lower Devonian of the Armorican Massif, is tentatively assigned to the athyridid brachiopod genus Planalvus Carter, thus far known only from the Lower Carboniferous of eastern North America. In addition, a new species, Planalvus rufus, is described from the Bois-Roux Formation (Pragian) of Brittany, France. These French species are small brachiopods with complex spiralial and jugal structures, which permit assignment to the order Athyridida.

scholarly journals II.—On Solenopora garwoodi, sp. nov., from the Lower Carboniferous in the North-West of England

1913 ◽  
Vol 10 (7) ◽  
pp. 289-292 ◽  
Author(s):  
George J. Hinde
Keyword(s):  
North America ◽  
Calcareous Algae ◽  
Lower Carboniferous ◽  
North West ◽  
The North ◽  
Jurassic Rocks

Some years since Professor E. J. Garwood sent to me for examination some pieces of limestone from the Lower Carboniferous rocks in the Shap and Ravenstonedale districts of Westmorland, in which he had observed the rounded outlines of fossils with a structure which appeared to him to resemble that of Stromatopora. The rock in which the fossils were embedded was so compact and hard that they could not be extracted, and it was necessary to make sections in various directions in order to ascertain their structure, which proved to be identical with that of Solenopora, now well known as one of the calcareous Algæ. It is many years ago since this genus was recognized in the Ordovician rocks in North America, Britain, and Eussia; more recently it was found in the Silurian rocks of the Isle of Gotland, and in 1894 a species was described from the Jurassic rocks of Gloucestershire and Yorkshire. But until this fortunate discovery of its occurrence in the Lower Carboniferous by Professor Garwood, no example of the genus was known in any of the rocks between the Silurian and the Jurassic.

Windsor Group (Lower Carboniferous) conodont biostratigraphy and palaeoecology, Magdalen Islands, Quebec, Canada

1986 ◽  
Vol 23 (4) ◽  
pp. 439-453 ◽  
Author(s):  
Hilary A. Plint ◽  
Peter H. von Bitter
Keyword(s):  
Nova Scotia ◽  
Shallow Water ◽  
Lower Carboniferous ◽  
Conodont Biostratigraphy ◽  
Conodont Zonation ◽  
Total Lack ◽  
Magdalen Islands

The Taphrognathus transatlanticus, Clydagnathus windsorensis, and Gnathodus zones, initially defined in the Codroy Group of Newfoundland, were identified in the Havre-aux-Maisons Formation of the Windsor Group of the Magdalen Islands, Quebec, Canada. Recognition of these zones permits correlation within the islands and with Newfoundland and Nova Scotia. The Taphrognathus transatlanticus and Clydagnathus windsorensis zones correlate with the lower and upper macrofaunal B Subzone, respectively, whereas the Gnathodus Zone corresponds to the C, D, and E macrofaunal subzones.Tectonism and plastic movement of sulphates and chlorides have resulted in fragmentation and transport of parts of the Havre-aux-Maisons Formation. The conodont zonation complements the macrofaunal zonation permitting correlation of fragmented blocks. When macrofaunas are scarce or absent the conodont zonation provides an alternative to one based on macrofauna only. It has been used effectively in assessing previous zonal determinations based on macrofauna.Conodonts of the Magdalen Islands are dominated by Clydagnathus, Cavusgnathus, Mestognathus, and Taphrognathus, all asymmetric cavusgnathiform genera. This dominance, the total lack of Gnathodus, abundant sulphates and chlorides, as well as foraminiferal and algal evidence, suggest that Lower Carboniferous conodonts of the Magdalen Islands lived in shallow-water shelf environments under conditions of fluctuating salinity.

A New Lower Carboniferous Echinoid from North America

1953 ◽  
Vol 90 (1) ◽  
pp. 65-69 ◽  
Author(s):  
Porter M. Kier
Keyword(s):  
New Species ◽  
North America ◽  
Lower Carboniferous ◽  
Apical Disc ◽  
A New Species

AbstractA new species of Palaeechinus, and the first certain member of that genus from North America, is described and several unusual features of its test noted. The apical disc of the specimen is extremely well preserved.

Palaeomagnetism of the Lower Carboniferous Billefjorden Group, Spitsbergen

1985 ◽  
Vol 122 (4) ◽  
pp. 383-388 ◽  
Author(s):  
D. R. Watts
Keyword(s):  
North America ◽  
Relative Motion ◽  
Early Carboniferous ◽  
Pole Position ◽  
Russian Platform ◽  
Lower Carboniferous ◽  
Fine Grained ◽  
Palaeomagnetic Data ◽  
The Baltic

AbstractPalaeomagnetic data from mid to late Palaeozoic rocks are potentially valuable for testing models of the assembly of Spitsbergen and for determining the palaeo-position of parts of Spitsbergen relative to the major tectonic elements that comprised the Old Red Continent. Fine-grained red sandstones from the Tournaisian to Namurian Billefjorden Group, collected by members of Cambridge Spitsbergen expeditions, were subjected to stepwise chemical and thermal demagnetization. The characteristic magnetization is found in normal and reverse polarities and corresponds to a pole position at 23° S, 332 °E, dp = 5.7°, dm = 10.5°, which is near an early Carboniferous pole computed for the Baltic Shield-Russian Platform (Baltica). When compared to Laurentia (North America) in the context of the revised Mauch Chunk palaeomagnetic study, Spitsbergen falls a few degrees south of the Bullard reconstruction but the error of the determination of the palaeolatitude overlaps with this position. Therefore relative motion between any part of Spitsbergen and Laurentia and Baltica during the Carboniferous is not resolved.

XVII.—The Small Spore Floras of Coals in the Limestone Coal Group and Upper Limestone Group of the Lower Carboniferous of Scotland

1958 ◽  
Vol 63 (2) ◽  
pp. 353-392 ◽  
Author(s):  
Mavis A. Butterworth ◽  
Ralph W. Williams
Keyword(s):  
New Species ◽  
North America ◽  
New Genera ◽  
Lower Carboniferous ◽  
Comprehensive Account ◽  
Small Spore

SynopsisThis paper provides a comprehensive account of the small spore assemblages of coals in the Limestone Coal Group and Upper Limestone Group (Namurian) of the Lower Carboniferous of Scotland. The coals were obtained from boreholes sunk in the Lothians, Central, and West Fife coalfields. Over ninety species of small spores are figured. Of this number twenty-six are new species. Five new genera—Glomospora, Procoronaspora, Callisporites, Tholisporites and Remysporites—are described. Full descriptions are given of all new genera and species. The assemblages are compared with assemblages of similar age in North America, the U.S.S.R. and elsewhere, and it is shown that the Carboniferous pre-Westphalian microfloras were uniform over wide areas of the earth's surface.

Late Devonian ammonoids from Ohio and adjacent states

1986 ◽  
Vol 60 (1) ◽  
pp. 126-144 ◽  
Author(s):  
M. R. House ◽  
Mackenzie Gordon ◽  
W. J. Hlavin
Keyword(s):  
New Species ◽  
North America ◽  
Middle Level ◽  
Eastern North America ◽  
Late Devonian ◽  
Lower Carboniferous ◽  
International Importance ◽  
A New Species ◽  
Cleveland Ohio

Three late Devonian ammonoid-bearing levels are described from the area of Cleveland, Ohio. These appear to represent the German Platyclymenia, Clymenia and Wocklumeria Stufen, clear evidence for which has been lacking previously in eastern North America. The lowest level, around the base of the Cleveland Shale, yieldsSporadoceras, Cyrtoclymenia, Platyclymeniaand a new species,Pleuroclymenia(?)ohioense. The middle level, near the top of the Cleveland Shale, bearsCymaclymenia, SporadocerasandPrionoceras. The highest level, just above the base of the Bedford Shale, hasPrionoceras quadripartitum. This species, and a fauna of the basal Bedford, have been located also in the area of Columbus, Ohio. AnEpiwocklumeria(?) sp. is recorded from Indiana. Attention is drawn to the international importance of the late Famennian and Lower Carboniferous ammonoid sequence which can now be recognized in Ohio.

Demosponges and hexactinellid sponges from the Lower Devonian Ross Formation of west-central Tennessee

1995 ◽  
Vol 69 (2) ◽  
pp. 211-232 ◽  
Author(s):  
J. Keith Rigby ◽  
Craig R. Clement
Keyword(s):  
New Species ◽  
North America ◽  
Marine Environment ◽  
Lower Devonian ◽  
Normal Wave ◽  
Lower Carboniferous ◽  
West Central ◽  
The Family ◽  
Benton County ◽  
Hexactinellid Sponges

A fauna of eight taxa of demosponges and hexactinellid sponges has been collected from the Lower Devonian (Lochkovian) Ross Formation, largely out of the upper Birdsong Shale Member in Benton, Decatur, and Perry Counties in west-central Tennessee. The Upper Birdsong Shale (“bryozoan zone”) in which the sponges are most common appears to have been deposited below normal wave base in a quiet marine environment, and represents a terrigenous clastic sediment influx onto a carbonate shelf that had existed in the area from at least the middle Silurian. Benton Quarry in Benton County was the most productive locality for fossil sponges.The new demosponge genera and species Ginkgospongia foliata and Coniculospongia radiata occur with the new species Haplistion lobatum and skeletal mats of fine spicules, along with moderately rare specimens of Hindia sphaeroidalis Duncan. The new hexactinellid genus and species Stiodermiella amanita and Stiodermiella tetragona are characterized by peculiar ornamented papillose, swollen spicules that produce a massive, armored layer on the upper part of the sponge. The latter are associated with the new hexactinellid species Twenhofelella bulbulus, which has relatively normal-appearing hexactines, and with an indeterminate hexactinellid genus, which has spinose hexactines in irregular orientation in a small, platelike fragment. Root tufts of probable hexactine origin also occur.Swollen spicules in Stiodermiella are reminiscent of swollen spicules in the family Stiodermatidae Finks, largely from the Permian of western Texas, but elements of the family are also known from Lower Carboniferous to Permian rocks in Europe and North America.

Peremistocrinus from the Dewey Limestone Formation, Oklahoma

1948 ◽  
Vol 85 (2) ◽  
pp. 113-116
Author(s):  
Harrell L. Strimple
Keyword(s):  
North America ◽  
Systematic Study ◽  
National Museum ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
James Wright ◽  
North Eastern ◽  
The U.S

The first systematic study of anal variations found among various Carboniferous crinoids was presented by James Wright (Geol. Mag., lxiii, 1926) and covered Eupachycrinus calyx (McCoy) (now Phanocrinus Kirk) and Zeacrinus konincki Bather. Subsequently (Geol. Mag., lxiv, 1927), the genus Hydreionocrinus, and Ulocrinus globitlaris (Geinitz) (now Ureocrinus Wright and Strimple, Geol. Mag., lxxxii, 1945) were also considered. A total of 2,014 dorsal cups from the Scottish Lower Carboniferous (Mississippian) were involved in the examinations. These specimens were all from strata considered equivalent to the Chester Series (upper Mississippian) of North America. When presenting the genus Phanocrinus Kirk (Journ. Paleont., 11, 1937) recognized the importance of Wright's studies, but noted that examination of an almost equal amount of American material (primarily the Springer collection of the U.S. National Museum) had failed to disclose such great variations. That Kirk was highly impressed by Wright's studies is certain, for in personal conversations, several years ago, he emphasized the potentialities as they might affect my impending studies of Pennsylvanian crinoids. It has, therefore, been with much interest that I have watched similar patterns of development appearing in the large collections being made from both Chester (Upper Mississippian = European upper Lower Carboniferous) and Missouri (Middle Pennsylvanian = European middle Upper Carboniferous) of north-eastern Oklahoma.

Upper Devonian conodonts from the Timan-Pechora region, Russia, and correlation with a Frasnian composite standard

1996 ◽  
Vol 70 (1) ◽  
pp. 131-152 ◽  
Author(s):  
Gilbert Klapper ◽  
Alexei V. Kuz'Min ◽  
Nonna S. Ovnatanova
Keyword(s):  
North America ◽  
Western Australia ◽  
Distribution Patterns ◽  
Upper Devonian ◽  
Correlation Diagram ◽  
Western Canada ◽  
Conodont Zonation ◽  
Montagne Noire

A Frasnian composite standard provides a refined scaling for the thirteen-fold conodont zonation first developed in the Montagne Noire, France, but since replicated in North America, Australia, and now the Timan-Pechora region of Russia. Zones 4–13 are identifiable in seven cores from the Ukhta area of southern Timan and a core from the Bagan Field of the Khoreyver Basin. Scaling of the zones through graphic correlation demonstrates the diachronism in different sections of the bases of many conodont species, including those of zonally definingPalmatolepis.This can be effectively shown in a correlation diagram scaled to a composite standard based on graphic correlation, whereas it is obscured by the assumption of synchronism inherent in conventional zonal correlation charts.Newly described species occurring in the Timan-Pechora region and elsewhere areOzarkodina nonaginta, Ancyrognathus amplicavus, Mesotaxis johnsoni, Palmatolepis amplificata, P. mucronata, P. ormistoni, andP. timanensis.A number of other species described earlier from the region also occur outside Russia, mainly in Canada and Australia. Distribution patterns in the composite standard indicate close faunal connections between the Timan-Pechora, western Canada, and Western Australia.

Sign in / Sign up

Export Citation Format

Share Document