1,060 research outputs found
La Sardegna
No full textA working group within the Italian Association of Geomorphologists (AIGEO) started its activity at the end of 2002. A number of Italian researchers, engaged in studies on the periglacial environment
and often dealing with relict forms, decided to get together in order to actively compare their study objects and methods. In Italy, landforms related to periglacial processes have been recognized for a long time (Capello, 1960) and permafrost
distribution in the present and throughout the Quaternary has recently been reconstructed by means of typical landforms (e.g. rock glaciers) (Dramis and Guglielmin, 1999). However, many other landforms, e.g., different types of inactive scree,
common mainly in the Apennine chain and in Sardinia, were identified in the past and considered as "periglacial". Although displaying different characteristics with regard to parent material, texture, form, position and extension, they have
some features in common: they are located on moderately steep slopes, are made of a coarse debris that may be mixed with fine material and they have no sedimentary features typical of fluvial or gravitational landforms; in all cases they are not
related to present-day geomorphic processes. In the literature they were classified mainly as éboulis ordonnées, grèze liteée and block streams/fields.
The Group will be working until 2005. In this first period its main aims are: 1) to collect evidence in order to clarify the true genetic environment of the investigated landforms: whether they are really periglacial, or whether just cryogenic
weathering and frost shattering can be responsible for coarse sediment supply, in absence of even sporadic permafrost, and 2) to employ typical periglacial landforms in their relict state (e.g., rock glaciers and wedge casts) for Quaternary
paleoclimatic reconstructions in Italian low altitude mountain environments.
Firstly, study areas were established and a preliminary illustration of the deposits concerned permitted the members to compare the different typologies
Tutela e valorizzazione degli ambienti carsici nell’Area Marina Protetta di Capo Caccia–Isola Piana: la grotta Verde di Capo Caccia (Alghero, Sardegna nord occidentale). (2008) Ginesu S., Carboni D., Russino G., Secchi F., Sias S.. Mem. Ist. It. Speleol. Bologna. 21, 517-526
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Il ruolo della geomorfologia nel recupero di aree ad elevato degrado ambientale: il caso di Fiume Santo
No full textNuovi resti di Mammuthus lamrmorai (Major, 1883) nei depositi alluvionali del Pleistocene medio di Campu Giavesu (Sardegna Nord-occidentale).
No full textMammuthus lamarmorai (Major, 1883) remains in the Middle Pleistocene alluvial deposits of Campu Giavesu plain (North-western Sardinia; Italy).
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Phonons in SiAs: Raman scattering study and DFT calculations
No full textS.2132-2136We present experimental Raman scattering results on single-crystal silicon monoarsenide (SiAs). Based on a comparison between Raman measurements and first-principles density functional theory calculations, we found evidence that SiAs will occur in a monoclinic crystal structure rather than an orthorhombic one as has been discussed in the literature. Further, we provide a detailed discussion of the vibrational properties of the monoclinic structure.42Nr.1
Strutture sommerse e dinamica costiera lungo i litorali dell'Argentiera (Sardegna nord occidentale): prime osservazioni
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