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| Registros recuperados: 13 | |
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| Berthois, Léopold. |
| The sediments which are dealt with in this work are unevenly distributed throughout the North Sea and the Irish Sea. In the North Sea, four areas have been studied: they are: the area off Möre Romsdal, the Tanners Hill Ground area, the Devil's Hole area and the Outer Silver Pit area (fig. 1).Detailed charts have been drawn for each of these areas. The position of each sample point has been marked down. However, some samples have not been indicated. Their distance from the represented area would have lead to local charts of too big dimensions or too small scales. In that last event, the interesting areas would not have been represented with enough accuracy.The exact position of each sample, in longitude and latitude, as well as its depth, has been recorded... |
| Tipo: Text |
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| Ano: 1957 |
URL: http://archimer.ifremer.fr/doc/1957/publication-4642.pdf |
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| Berthois, Léopold; Guilcher, André. |
| Presque tous les types lithologiques que nous avons dragués ont pu être identifiés d'après les roches récoltées en Irlande ou en Grande-Bretagne. Les roches immergées dont les caractères microscopiques ne correspondent à aucun des échantillons récoltés à terre sont les suivantes: STATION 18. Micaschiste différent du micaschiste dalradien récolté à terre. Cette disparité n'est pas très surprenante étant donné les variations habituellement observées entre des micaschistes d'une même série cristallophyllienne. Calcaire à ostracodes, par la structure microcristalline de sa pâte, ce calcaire s'apparente à ceux du Crétacé récoltés à terre; il en diffère par sa faune. Gneiss à feldspaths calco-alcalins. Bien que nous n'ayons pas récolté cette roche à terre,... |
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| Ano: 1961 |
URL: http://archimer.ifremer.fr/doc/1961/publication-4263.pdf |
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| Berthois, Léopold. |
| Up until now, the Bay of Biscay has been the focus of only a very small number of studies. In its lithologic map of French seas, Delesse (1872) identified the sediments based only on the soundings of the French Naval Hydrographic Service. Thoulet's (1904) submarine lithologic map was made using the same information completed by the analysis of a small number of dredgings (J. Thoulet 1901), which enabled the author to correct Delesse's data, especially in the area commonly called "la grande vasière" (the great mudflat). In 1925, L. Dangeard conducted, on board the "Pourquoi Pas?", a few dredgings in the Bay of Biscay. The results will be analysed in this work. In 1935, J. Furnestin carried out a number of very important observations which will also be... |
| Tipo: Text |
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| Ano: 1955 |
URL: http://archimer.ifremer.fr/doc/1955/publication-6522.pdf |
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| Berthois, Léopold; Le Calvez, Yolande. |
| Examination of marine sediments containing planktonic foraminifers within siliceous sediments prompted us to carry out a comparative study on their respective settling velocities. Using the determinations done by Durand and Cohen de Lara (1953), we adopted the same method of calculation as in a recent note on the settling velocity of maerl grains (Berthois and Guilcher 1959). We will draw heavily from these two studies. To compare with data on quartz particles, we carried out a series of experiments on settling velocities in fresh water. We then measured the velocities in salt water. |
| Tipo: Text |
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| Ano: 1960 |
URL: http://archimer.ifremer.fr/doc/1960/publication-4273.pdf |
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| Berthois, Léopold. |
| Numerous laboratory studies have been done on the formation and on the evolution of sand ridges. Durand (1951) studied the formation of ridges in channels. He showed that when a sand grain from the transport layer in direct contact with the bottom comes to rest, it has a tendency to stop all the other particles coming from upstream at the same level. The upper layers are slowed in succession and it is as if an additional layer had been added, with this layer being made up of particles taken from the permanent sediment discharge of higher regions in saltation.... |
| Tipo: Text |
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| Ano: 1959 |
URL: http://archimer.ifremer.fr/doc/1959/publication-4492.pdf |
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| Berthois, Léopold. |
| I had the opportunity to be part of a hydrology and sounding cruise in the Bay of Biscay on board the "Thalassa" in May and June 1964. During this expedition, which aimed to study deep water turbidity, I took some measurements from the sampled waters. I would like to thank M. OARDIGNAC, head of mission for the I.S.T.P.M., for his help in the implementation of the measurements and for passing on the results of the salinity and temperature measurements conducted under his direction. As my work was conducted outside of the I.ST.P.M.'s hydrology program, I could not actually analyse all the samples collected in the framework of the study of the waters of the Bay of Biscay. On the other hand, my main goal was to measure deep waters turbidity, around submarine... |
| Tipo: Text |
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| Ano: 1965 |
URL: http://archimer.ifremer.fr/doc/1965/publication-4021.pdf |
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| Berthois, Léopold; Brenot, Roger; Ailloud, P. |
| The bathymetric charts based on the measurements taken near the continental shelf between the Western part of Ireland and Cap Finisterre (Spain) have been published by the Scientific and Technical Institute of Marine Fisheries.These charts were completed between 1961-1963 each time the Institute of Marine Fisheries ("Président Théodore Tissier", then "Thalassa") vessels cruised the studied area, during their hydrology cruises and fishing surveys.But it became necessary to coordinate and complete the collected data by a bathymetry cruise. This cruise took place in 1964.During this last cruise, conducted with an Atlas-Echolot 601 echo sounder, the vessel's routes were immediately and permanently mapped, combining the information obtained through the Decca 1... |
| Tipo: Text |
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| Ano: 1965 |
URL: http://archimer.ifremer.fr/doc/1965/publication-4002.pdf |
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| Berthois, Léopold; Brenot, Roger. |
| The Gulf of Capbreton is one of the first submarine canyons known in the world's oceans. A specimen sheet, based on soundings, was made by the Scientific and Technical Institute of Marine Fisheries. Moreover, west of the entrance of the English Channel, the studies conducted by E. Le Danois and L. Beaugé (1), who drew a map limited to the east by the shoal of la Chapelle, highlighted the complexity of the topography of the continental shelf at the two extremities of the great arc formed by this slope in the Bay of Biscay. |
| Tipo: Text |
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| Ano: 1957 |
URL: http://archimer.ifremer.fr/doc/1957/publication-4662.pdf |
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| Berthois, Léopold; Brenot, Roger. |
| 1° the topography of the depression located east of the "Markhams Hole" of the "Fischereikarte der Nordsee" is quite different from that represented on the chart, but the observed depths are the same.2° the depression of the "Markhams Hole" does not exist. Where depths of 60 metres were indicated on the chart we only observed depths of 30 to 35 metres.3° the topography of the "Outer Silver Pit" is extremely complex; there is no doubt that another series of transversal transects would show more peculiar topographic accidents than those observed.However, we think that we have detailed enough this depression's main topographic lines to conclude that its model is mostly a Quaternary model of glacial or periglacial origin. The sedimentological study of the... |
| Tipo: Text |
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| Ano: 1957 |
URL: http://archimer.ifremer.fr/doc/1957/publication-4661.pdf |
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| Berthois, Léopold; Brenot, Roger; Ailloud, P. |
| Soundings in the west of the Iberian Peninsula aimed at extending the morphological identification of the continental slope all the way to the Cap Saint-Vincent (Portugal) started in 1956 from the Porcupine bank (west of Ireland).Works started during the cruises of the oceanographic research vessels of the Scientific and Technical Institute of Marine Fisheries: the "Président Théodore-Tissier" and the "Thalassa", as they were on their way to the Mediterranean Sea or other regions south of the Strait of Gibraltar.These first results were then completed during different research expeditions on fishing, off the Portuguese coast.This discontinuity in the operations, spread out over many years, resulted in all the navigation and soundings being conducted by... |
| Tipo: Text |
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| Ano: 1965 |
URL: http://archimer.ifremer.fr/doc/1965/publication-4003.pdf |
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| Registros recuperados: 13 | |
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