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| Pautot, Guy; Fontes, Jc. |
| The occurrence of "rose"-like aggregates with diameters of a few centimetres in a core of dark brown siliceous mud of the Congo deep-sea fan (depth of 4 070 m) is reported. The rosettes are well preserved. They have the crystalline outlines of gypsum but are made of calcite (97% with traces of quartz and clay minerals. In addition to the preserved specimens, fragments of rosettes occur at various levels in the sedimentary column. The core was taken on a levee of the submarine canyon and the depositional environment is thus compatible with down-slope sedimentation. Discussion concerning the origin of the rosettes takes into account regional morphology and structure, sedimentary cover and the isotopic composition of calcite from the rosettes. The most... |
| Tipo: Text |
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| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/1979/publication-5243.pdf |
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