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| Hoek Ostende, L.W. van den; Doukas, C.S.; Reumer, J.W.F.. |
| Introduction In their report of a meeting at Reisensburg, the RCMNS working group on fossil mammals presented ranges of Neogene mammal genera (De Bruijn et al, 1992). However, no erinaceid, talpid or shrew can be found in the tables. The working group concluded (p. 70); "The omission of all the insectivores is regretted, but the participants of the Reisensburg meeting consider this order insufficiently known at this moment." In 1990, this position was justifiable if not justified. Mammal studies up until then had focused on the stratigraphical position of the various faunas. The insectivores, far less numerous than the rodents, usually played a minor role in these studies and were either identified provisionally or not included at all. Detailed... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.24. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/317362 |
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| Buurman, P.. |
| Several pieces of fossil wood have been analyzed with X-ray diffraction and were grouped on the basis of mineralogical composition. Various mineralizations were studied in thin sections and by means of the scanning electron microscope. Wood-opals appear to show a structure preservation that points to replacement of cell walls by silica. The wood-opals are mineralogically characterized as 'disordered tridymite'. Other mineralizations, such as chalcedony, quartz, carbonates, phosphates and iron-oxydes and -hydroxydes show characteristics of filling-in. Various mineralization processes are discussed. |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.24. |
| Ano: 1972 |
URL: http://www.repository.naturalis.nl/record/317496 |
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