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作者:J. Böcker , R. Littke , C. Hartkopf-Fröder ...
来源:[J].International Journal of Coal Geology(IF 2.976), 2013, Vol.107, pp.112-126
摘要:Abstract(#br)The molecular composition of 58 Duckmantian Ruhr coals and adjacent sedimentary rocks has been analyzed using organic-geochemical investigations representing a maturity range from 0.74 to 0.98% vitrinite reflectance. In addition eight samples of higher maturity (1.46...
作者:K. Jasper , C. Hartkopf-Fröder , G. Flajs ...
来源:[J].Review of Palaeobotany and Palynology(IF 1.933), 2010, Vol.162 (2), pp.123-145
摘要:Abstract(#br)For this study, six seam sequences of Duckmantian age from the Ruhr Basin, western Germany, were analysed. 155 samples from drill cores were examined, including coal samples, as well as organic-rich and clastic sedimentary rocks. All samples were analysed using pa...
作者:T.J Pearce , B.M Besly , D.S Wray ...
来源:[J].Sedimentary Geology(IF 1.802), 1999, Vol.124 (1), pp.197-220
摘要:Abstract(#br)Chemostratigraphy has been applied to onshore Duckmantian/Stephanian successions encountered in outcrop and penetrated by two boreholes from the West Midlands (U.K.). These successions represent the onshore equivalents of the `Barren Red Measures' which are important...
作者:S.F Greb , C.F Eble , J.C Hower
来源:[J].International Journal of Coal Geology(IF 2.976), 1999, Vol.40 (4), pp.255-280
摘要:Abstract(#br)More than 3800 coal thickness measurements, proximate analyses from 97 localities, and stratigraphic and sedimentological analyses from more than 300 outcrops and cores were used in conjunction with previously reported palynological and petrographic studies to map in...
作者:Jana Frojdová , Josef Pšenička , Jiří Bek
来源:[J].Acta Palaeobotanica, 2017, Vol.57 (2), pp.153-163
摘要:Abstract Sturia amoena (Stur) Němejc is a Pennsylvanian adpression true fern known from the Charbonnière de Belle et Bonne (Belgium) and from the Radnice and Kladno-Rakovník basins (Czech Republic). This revision includes a detailed study of pinna and pinnule morphology, aph...
作者:BARRY A. THOMAS , LEYLA J. SEYFULLAH
来源:[J].Geological Magazine(IF 2.27), 2015, Vol.152 (5), pp.858-870
摘要:Abstract Stigmaria is one of the iconic plant fossils of the Carboniferous and fragments of the narrower parts of the rhizomorph are found in most museum collections. However, very few almost entire specimens have been found and preserved. A new specimen of Stigmaria from Brymbo,...
作者:C.F. Cottnam , A.R. Hemsley , R. Rössler ...
来源:[J].Review of Palaeobotany and Palynology(IF 1.933), 2000, Vol.109 (1), pp.33-44
摘要:... The particulate wall ultrastructure of a previously published Carboniferous (Duckmantian) megaspore assigned to this genus suggested that this form of wall construction may have been the ancestral wall structure of the group, an observation which posed difficulties in relatin...
作者:Paul C. Lyons , T.E. Krogh , Y.Y. Kwok ...
来源:[J].International Journal of Coal Geology(IF 2.976), 2005, Vol.67 (4), pp.259-266
摘要:Abstract(#br)The Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian Series, Duckmantian Stage]–a kaolinized, volcanic-ash deposit occurring in Kentucky, West Virginia, Tennessee, and Virginia–is the most widespread bed in the Middle Pennsylvanian of the cen...
作者:BARRY A. THOMAS , LEYLA J. SEYFULLAH
来源:[J].Geological Magazine, 2015, Vol.152 (5), pp.858-870
摘要:Stigmaria is one of the iconic plant fossils of the Carboniferous and fragments of the narrower parts of the rhizomorph are found in most museum collections. However, very few almost entire specimens have been found and preserved. A new specimen of ...
作者:Ellen Stolle
来源:[J].Geologia Croatica(IF 0.511), 2012, Vol.65 (3)
摘要:... The correlation of the palynological record from the re-investigated AK-1X well section to the chronostratigraphy corresponds with ages around the Duckmantian–Bolsovian boundary, and correlation to the uppermost Duckmantian is discussed as a possibility. However, recent st...

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