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A new preparatory approach of decapod and thoracican crustaceans from the Middle Danian at Fakse, Denmark Naturalis
Jakobsen, Sten Lennart.
Many papers on the taxonomy of fossil crustaceans are often based upon poorly preserved material and/or specimens that have been insufficiently prepared. The purpose of the present note is to outline some preparation methods that are applied in our (J.S.H. Collins and S.L.J.) ongoing studies of anomuran and brachyuran decapods from the Middle Danian limestones at Fakse quarry (Denmark), which have greatly enhanced the quality of our material. The techniques briefly outlined here involve: 1 – staining method; 2 – water blasting (as a cleaning tool in preparation of fossils); and 3 – negative preparation (with acid). Some of these techniques will have wide applications in other fields of paleontological research.
Tipo: Article / Letter to the editor Palavras-chave: Preparation; Crustacea; Danian; Denmark.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534413
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Palynology and paleoenvironmental significance of the Tunal Formation (Danian) at its type locality, El Chorro creek (Salta, Argentina) Ameghiniana
Volkheimer,Wolfgang; Novara,Martín G.; Narváez,Paula L.; Marquillas,Rosa A..
The palynologic investigation of samples from the Tunal Formation at El Chorro creek (Salta, Argentina) resulted in the recovery of terrestrial assemblages of pollen and spores associated with freshwater algae (Pediastrum spp. and Scenedesmus sp.). Of the 43 species of sporomorphs identified for the Tunal Formation so far, 28 species are cited here for the first time. The spores and pollen indicate a Danian age at the type locality. Sedimentary proxidata including abundant evaporites suggest intervals of at least seasonal arid environmental conditions. In contrast, the palynologic assemblages recovered from the organic rich dark shales indicate the presence of swampy areas and forests surrounding them. The dominance of Verrustephanoporites simplex...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palynology; Paleoenvironment; Paleogene; Danian; Tunal Formation; Salta Group Basin; Argentina.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000300005
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