79 research outputs found
Miospores et acritarches de la formation d'Hydrequent (Frasnien superieur à Famennien Inferieur, Boulonnais, France)
Get PDFThe upper part of the Hydrequent Shales, which are inserted between the last dolomite layer and the Ste Godeleine Sandstone, consists of at least 20 m of shaly sediments with thin sandy partings. The 44 samples studied have yielded numerous spore and acritarch species which permit a very detailed palynological zonation to be established, mainly corresponding to the upper Frasnian. The highest samples, 0.5 m below the Ste Godeleine Sandstone, can be correlated with the lower Famennian of the Belgian stratotype. The Frasnian-Famennian boundary thus falls within the Hydrequent Shales between 0.5 and 2.5 m below the Ste Godeleine Sandstone
Famennian glaciation in the eastern side of Parnaíba Basin, Brazil: evidence of advance and retreat of glacier in Cabeças Formation
Full text linkLate Frasnian - Famennian climates based on palynomorph analyses and the question of the late Devonian glaciations.
Full text linkSynthèse palynostratigraphique de l'intervalle Givétien-Famennien du Boulonnais (France).
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Observations on the establishment of a Devonian and Lower Carboniferous high resolution miospore biostratigraphy
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Nouvelle datation par miospores du Givétien-Frasnien des sédiments non marins du sondage de Booischot (Bassin de Campine, Belgique),
Full text linkBiostratigraphical correlation between the Hangenberg Schiefer (Northern “Rheinisches Schiefergebirge”) and glacigenic deposits in Brazil.
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