L'unité granulitique des Iforas, constituée de matériel éburnéen, correspond à une grande nappe de socle pan-africaine dont la géométrie complexe s'explique par l'interférence de plusieurs épisodes de déformation.
Palaeoenvironmental reconstruction from near-surface pan sediments : an example from Lebatse Pan, southeast Kalahari, Botswana
This paper reports the results of the analyses of 3 cores, 1.8 to 2.6 m in length, taken from Lebatse Pan in southeast Kalahari. The sedimentary characteristics are compared with other core logs from the region, and an assessment is made
The origin and distribution of pans in the Orange Free State
The area covered by pans in the Orange Free State varies from nul in some parts to more than nine percent per quarter degree square. The highest incidence is found in the western parts of the province. Percentages exceeding 1,5 percent per unit area
are also situated to the east of Bethlehem. Factors which influenced and are at present influencing the distribution of pans, are soft bedrock formations, stream derangements by aeolian deposits, the presence of soluble salts in the sediments, precipitation
characteristics, the action of larger mammals, the more or less plainlike character of the terrain, and wind erosion. The latter is considered the most important factor and most pans in fact prove to be deflation hollows. At present wind erosion is not effective
in the eastern parts of the province and the presence of pans in that area can only be ascribed to a more arid climate in the past. (L'A.).
Thermo-topographically induced winds in the boundary layer over the Etosha Pan
Boundary layer winds over the Etosha Pan in Namibia reveal a diurnal oscillation. An analysis of this phenomenon is presented with relation to synoptic forcing and thermo-topographical forcing. - (AJC)
Soils and associated materials of some pan floors and margins in southern Africa : a review
A review of information on the occurrence, classification, properties and genesis of soils, pedogenic duricrusts and unconsolidated sediments covering pan floors and margins. A three-fold division based on climate was establisehd. - (AJC)
Le concept de Pan-Europe de Richard N. Coudenhove-Kalergiego
Années 1920 ; Années 1930 ; Concept ; Europe ; Intégration politique ; Pan-Europe
The article presents the life and creative output of Richard N. Coudenhove-Kalergi, the author of the Pan-Europe concept that brought together many of Europe's leading intellectuals in the inter-War period. The assumptions that underpinned the Pan
Processes of silicate karstification associated with pan formation in the Darwin-Koolpinya area of Northern Australia
The purpose of this paper is to describe sediments within a pan in northern Australia, where the geomorphological history is known and where water analyses have established the nature of the contemporary processes. The target was to examine in what
way and to what extent the sediments reflect the known history of the pan. Results of thin section microcopy and scanning electron microscopy with energy-dispersive X-ray are discussed.
At about 1000 m above sea level in the Vallombrosa Forest, northern Apennines, a dense pan that meets the diagnostic criteria for fragipans is discontinuously distributed. The aim of this work is to investigate the nature of the fragipan and to find
De nouvelles mesures d'âges au strontium par isochrones sur roches totales ont mis en évidence, dans le socle du Togo et du Bénin, un métamorphisme d'âge pan-africain pouvant atteindre le faciès des amphibolites et affectant une série volcano
-sédimentaire d'âge inconnu, des syénites alcalines pan-africaines, des granites éburnéens, et des diorites quartziques éburnéennes ou antérieures.
Synteza wyników ekspertyzy PAN pt. Analiza uwarunkowań i skutków migracji ze wsi do miast ze szczególnym uwzględnieniem wpływu tych migracji na strukturę ludności wiejskiej
Obieg wody i spłukiwanie na fliszowych stokach użytkowanych rolniczo w latach 1980-1990 (wyniki badań przeprowadzonych na poletkach doświadczalnych na Stacji Naukowej IGiPZ PAN w Szymbarku)
Distribution patterns of gypsum and kalistrontite in a dry lake basin of the southwestern Kalahari (Omongwa pan, Namibia)
The studied basin is a pan of the southwestern Kalahari, in eastern central Namibia. The distribution patterns of gypsum and kalistrontite are mainly determined by groundwater depth and by the lithological composition of the deposits. Gypsum occurs
Pan-national identities : representations of the Philippine diaspora on the world wide web
Les AA. montrent comment la Toile (web) mondiale peut faciliter la mutation d'une identité trans-nationale en une identité globale et pan-nationale. Le concept de tahanang est spécifique de la diaspora philippine, le chez-soi servant de métaphore
pour une identité philippine pan-nationale. Le web ne facilite pas seulement les interactions spatiales des communautés en diaspora, mais il nourrit la représentation de l'identité nationale. Dans le cas de cette diapora, les réseaux de sociabilité
Identification of dominant climate factor for pan evaporation trend in the Tibetan Plateau
In this paper, a derivation based approach has been used to quantitatively assess the contribution rate of climate factors to the observed pan evaporation paradox across the Tibetan Plateau. The results showed that a decrease in wind speed
was the dominant factor for the decreasing pan evaporation, followed by an increasing vapor pressure and decreasing solar radiation, all of which offset the effect of increasing temperature across the Tibetan Plateau.
Anthropogenically-triggered iron pan formation in some Irish soils over various time spans
This paper synthesises existing and new research into the influence of man on the development of iron pans in Irish soils. The common theme in this work is the influence of organic matter, directly or indirectly, on the fate of iron and on its
, the development of an iron pan is a relatively modern process, superimposed on an earlier generation of distinctly different horizons.
The nature of calcareous deposits along pan margins in eastern central Namibia
This report describes a mainly petrographical study of calcareous deposits that are associated with pan basins in eastern central Namibia, aimed at establishing the mode of development of this common type of formation. Some observations are also
pedogenic origin should also be considered for calcareous deposits that commonly occur along pan margins in other parts of southern Africa.
Les nappes précambriennes du Gourma dans la chaîne pan-africaine du Mali
Gourma ; Géographie de l'Afrique ; Géologie régionale ; Mali ; Métamorphisme de HP/BT ; Nappe ; Nappe de charriage ; Pan-Africain ; Précambrien
Situé à l'Ouest du fossé crétacé de Gao, le Gourma oriental appartient à la chaîne pan-africaine du Mali. Il correspond à de grandes nappes pelliculaires mises en place vers l'W-SW à la bordure du craton ouest africain. Les nappes internes portent