...A. Murray D'Orsay; H. W. van de Poll Abstract Scanning electron microscope examination of quartz grains obtained from lacustrine limestones marginal to an alluvial fan in the middle Carboniferous Parrsboro Formation (Riversdale Group) reveals surface characteristics typical of glacial transport...

... nomenclature because it contains the type sections of the Cumberland and Pictou groups, and well exposed sections of strata traditionally assigned to the Riversdale group (abandoned) and Canso group (abandoned and replaced by the Mabou Group). Mapping and definition of lithostratigraphic units at the formation...

... and mapping new lithogenetic units and a more precise method of time control (fossil microspores) supports this hypothesis. Middle Carboniferous units of previous workers, the Windsor, Canso, and Riversdale “groups,” are time-stratigraphic and hence inadequate for defining facies. New lithogenetic units...

... Carboniferous interval of reversed polarity. This indicates that these beds which on geological evidence could be of Pictou or Riversdale age belong to the Riversdale Group. This result contributes to the pin-pointing of the stratigraphic position of the Carboniferous magnetic horizon marker which can be most...

... and Curvirimula? corvosa. Correlation with the British sequence suggests the Canso Group equals the lenisulcata Zone, the Riversdale Group equals the communis Zone, the Cumberland Group equals the similis-pulchra and modiolaris zones, and the Pictou Group correlates with the Morganian Series. GeoRef, Copyright...

... (Viséan–Namurian) rocks but not Riversdale Group rocks (Westphalian). Thrusting can be explained by sliding of material from an elongate horst extending from northern Cape Breton Island to southwestern Newfoundland which rose throughout Tournaisian and Viséan time. On a observé des failles de...

... subequatorial monsoon-type Mississippian climate. No metallic mineral occurrences of significance except Fe and U have been reported from the Horton or Riversdale-Cumberland Groups indicating that paleoclimatic conditions supporting sapropelic lacustrine deposits and/or coal measures and base metal-silver...

..., and at St. Andrews and South Branch of the Codroy lowlands, informally termed “Howley Beds,” were slightly older than the Riversdale Group of Nova Scotia, but were nevertheless Westphalian A (Langsettian) age. Coal seams of the St. George’s coalfield were considered correlatives of the Riversdale Group...

..., the Mabou Group is imaged as a relatively "quiet" interval with poorly developed reflectors (Grant, 1994; Rehill, 1996). The Cumberland Group (formerly including the Riversdale Group; Ryan et al., 1991) contains thick coals, thick channel sandstones, and grey to red fines of alluvial to restricted- marine...

... of the Douglas Coalfield, Lanarkshire Bulletin of the Geological Survey of Great Britain 1958 15 32 70 Rogers M. J. A description of the generating curve of bivalves with straight hinges Palaeontology 1982 25 109 117 Rogers M. J. Non-marine pelecypods from the Riversdale Group...

...J.H.A. Viljoen; H.C. Cawthra Abstract The Lower Cretaceous Buffelskloof Formation forms part of the uppermost Uitenhage Group, which is broadly composed of continental strata that infilled Mesozoic rift basins that developed during the breakup of the supercontinent Gondwana. The Buffelskloof...

.... Journal of Paleontology, 39, 663-686. - 1982. A description of the generating curve of bivalves with straight hinges. Palaeontology, 25, 109-117. - 1985. Non-marine pelecypods from the Riversdale group (Upper Carboniferous) Nova Scotia. Compte Rendu, 9 me Congris International de stratigraphie t de...

..., lower Cumberland Group (formerly ‘Riversdale’), and middle and upper Cumberland Group were made by Bell (1914 , 1926 , 1944 , 1958) . His work has provided the main biostratigraphic framework for stratigraphers in Atlantic Canada for many decades. Based on pelecypods, branchiopods, and macro-plants...

... of affinity for comparing assemblages, in particular of Foraminifera Palaeontology. London 1976 503 15 Rogers, M. J. 1979. Non-marine pelecypods from the Riversdale Group (Upper Carboniferous), Nova Scotia. C.r. 9me. Congr. Strat. geol. Carbonif., Urbana, 1979. Rogers M. J. A description...

... 1982 25 109 117 Rogers M. J. Non-marine pelecypods from the Riversdale group (Upper Carboniferous) Nova Scotia Compte Rendu, 9’me Congrès International de stratigraphie et de géologie du Carbonifére, (Urbana 1979) 1985 5 261 270 Sylvester-Bradley P. C. The subspecies...

..., Riversdale, and Cumberland Groups ( Barss, in Belt, 1965 ) was later extended to include the overlying Pictou Group ( Barss and Hacquebard, 1967 ). The zones were slightly revised by Hacquebard (1972 , Tables 4 and 5), who depicted their distribution in sections throughout the Fundy basin from New...

...Simon F. Mitchell Abstract The lithostratigraphy of the White Limestone Group (Eocene-Miocene) of Jamaica is revised based on geological mapping across the northern part of the Clarendon block. Eight shallow-water formations are recognised which are from base to top: Healthy Hill Formation (new...

... group of Bell (1944, p. 12). The Enrage contains no recognizable fossils but on the basis of evidence in the Boss Point formation the Riversdale group is Pennsylvanian in age and by European chronology is not older than Namurian or younger than Westphalian A. For the oil geologist...

... Bokkeveld shales of the Cape Super Group. Immediately west of the road cutting, a deep gully has incised eastwards towards the road (Figure 2 ). The Tierfontein site was selected because it exposes the three horizons: residual mantle, zone of superior weathering and zone of inferior weathering, thus...

... and evaporites which was correlated with the Windsor, Canso-Riversdale and Pictou groups (Howie and Barss, 1975). Seismic data indicate the total Carboniferous succession at the Hermine location is about 2100 m thick. Overlying strata are characterized by the massive Windsor Group evaporites that are commonly...