Plusieurs analyses factorielles ont permis d'identifier cinq faciès dans les sédiments profonds de LongIsland Sound (Etats-Unis): 1. Limon argileux| 2. Limon sablo-argileux| 3. Sable limono-argileux| 4. Sable limoneux| 5. Sables. Les faciès sableux
et sablo-argileux ne s'étendent pas au-delà des bancs et des marges du Sound. La plus grande partie du LongIsland Sound est recouverte par des sédiments à prédominance limoneuse.
Holocene tsunami deposits on the Bahaman islands of LongIsland and Eleuthera
Bahamas ; C 14 dating ; Coastal sedimentation ; Dating ; Erratic boulder ; Holocene ; Island ; Relative dating ; Tsunami
Les AA. présentent les résultats de la cartographie des sédiments holocènes liés à des tsunami sur LongIsland et Eleuthera. Ils comparent leurs premières datations absolues avec celles des traces de tsunami sur d'autres îles des Antilles. Pour
Eleuthera et LongIsland, ils mettent en évidence 2 forts tsunami venant de l'est, c'est à dire du large de l'océan Atlantique, au début de l'Holocène, il y a environ 3000 et 500 ans. Ces âges absolus correspondent bien aux indices d'âge relatifs fournis par
The distribution of Vibrio Parahaemolyticus, yeasts and yeast-like fungi, especially Candida Albicans in various environments of the Great South Bay of LongIsland, New York in Pollution and water resources. Pollution, coastal biology and water
Agent pathogène ; Candida albicans ; Eau de mer ; Etats-Unis ; Great South Bay ; Géographie humaine ; Littoral ; LongIsland ; New York ; Pollution ; Pollution organique ; Variation saisonnière ; Vibrio parahaemolyticus
Pleistocene glacial and interglacial stratigraphy of New England, LongIsland, and adjacent Georges Bank and Gulf of Maine in Quaternary glaciations in the Northern Hemisphere.
Accident nucléaire ; Centrale nucléaire ; Comportement ; Comportement face au risque ; Enquête ; Etats-Unis ; Géographie humaine ; LongIsland ; New York ; Présomption
Analyse des résultats d'une enquête sur la propension des populations à suivre des instructions face à un danger nucléaire. Analyse discriminante. LongIsland, N.Y.
The development of talus slopes around Lord Howe Island and implications for the history of island planation
Basalt ; Cliff ; Coastal environment ; Continental shelf ; Continental slope ; Digital elevation model ; Island ; Marine erosion ; Pacific Region ; Planation ; South Pacific Ocean
This paper investigates the evolution of talus slopes that occur beneath the loftiest cliffs, and places this analysis within the context of a longer history of island planation that has resulted in a wide truncated shelf around the island
. On comparison with published erosion rates from inland basalt scarps it appears that marine processes may account for over 90 per cent of the total cliff retreat that has occurred at Lord Howe Island, yet contemporary coastal morphology attests
The distributions and affinities of the macrolepidopteran taxa known from south-eastern Polynesia are investigated and contrasted with various geological hypotheses for the origin of the islands. A colonialist interpretation, long distance dispersal
into a westering assemblage of small islands much as seen today, appears to be most probable.
The origin of certain wide valleys in the Canary Islands
Canary Islands ; Geomorphology ; Inverted relief ; Lava flow ; Model ; Valley ; Volcanism
The present work addresses a long-term controversy concerning the origin of Orotava Valley, one of the most peculiar valleys in the Island of Tenerife. Analysis of the key features of Orotava Valley leads to formulation of an hypothesis which could
Temperature as an environmental factor in the Arctowski Station Area (King George Island, South Shetlands Islands)
Années 1980 ; Années 1990 ; Antarctique ; Arctowski ; South Shetland Islands ; Température ; Température de l'air ; Température de l'eau ; Température du sol
Data on the temperature of the air and bodies of water, as well as soil at depths 5-100 cm were collected in the vicinity of the Polish Arctowski Station on King George Island in the years 1979-1998. The temperature data for the soil surface layer
showed no clear trends, while air temperature increased. Soil temperature exceeded 0°C during six months of the year, which is two months longer than measured for the air temperature. The prevailing soil surface temperature ranged between -0.1°C and -2.0
in Kiribati and Tuvalu, two atoll nations. Strong evidence is found that recent influxes in population movements to urban central islands from rural outer islands can be attributed to a combination of the adverse impacts of climate change and socioeconomic
factors inherit in small island developing states. There is a pressure on local infrastructure and services and a general livelihood decline.
Medium-term fluvial island evolution in a disturbed gravel-bed river (Piave River, Northeastern Italian Alps)
Aerial photography ; Alps (The) ; Flood ; Fluvial dynamics ; Fluvial island ; Gravel ; Human impact ; Italy ; LiDAR ; River bed ; Stream ; Vegetation ; Veneto
Plan-form changes of river features since 1960 were analyzed using aerial photographs, and a LiDAR was used to derive the maximum, minimum and mean elevation of island surfaces, and maximum and mean height of their vegetation, in a 30-km-long reach
of the gravel-bed Piave River. The results suggest that established islands lie at a higher elevation than building and pioneer islands, and have a thicker layer of fine sediments deposited on their surface after big floods. After the exceptional flood in 1966
there was a moderate increase in island numbers and extension, followed by a further increase from 1991, due to a succession of flood events in 1993 and 2002, as well as a change in the human management relating to the control of gravel-mining activities. The narrowing
trend (1960–1999) of the morphological plan form certainly enhanced the chance of islands becoming established and this explains the reduction of the active channel, the increase in established islands and reduction of pioneer islands.
Archipelago ; Economic integration ; Island ; Malta ; Regional geography
The study gives basic geographical information about Maltese Islands. It contains demographic, political, geographical, historic etc. information. This small European state has a long history but its period of sovereignity is just three decades. Its
Entre la dorsale de Kolbeinsey et la zone néovolcanique du Nord de l'Islande, le décrochement du rift médioatlantique se serait produit le long de quelques grandes cassures (3 vraisemblablement). (J. C. Bodéré).
Catastrophe ; Comportement ; Date 1783 ; Eruption volcanique ; Géographie de l'Europe ; Géographie historique ; Histoire du peuplement ; Islande ; Laki ; Peuplement ; Siècle XVIII ; Volcanisme
Analyse des conséquences historiques de l'éruption volcanique qu'a connu l'Islande en 1783, ses impacts à long terme sur la population et la répartition du peuplement. L'A. resitue cette catastrophe naturelle dans l'environnement physique et le
Biogeography ; Forest ; Indonesia ; Island ; Vegetation dynamics ; Volcanic eruption ; Volcanism
The three Krakatau islands in Indonesia were completely denuded by the great eruption in 1883. One century after the eruption, the vegetation of Rakata on the one hand and of Panjang and Sertung on the other are quite different. In this paper
, the A. describes two cases of long-existing vegetation in the course of a succession, and seek out the mechanisms of the long existence.
(1979) ; Accident ; Aide à la décision ; Centrale nucléaire ; Comportement ; Comportement de l'évacuation ; Enquête ; Etats-Unis ; Géographie de l'Amérique ; LongIsland ; New York ; Perception ; Plan d'évacuation d'urgence ; Radiation nucléaire
spécifique de LongIsland avec plusieurs scénarios, et les recherches sur un plan d'urgence.