886 research outputs found
The geological map of Sardinia (Italy) at 1:250,000 scale
No full textOver the last 25 years the Italian national geological mapping program of the Italian Geological Survey (CARG Project, italian: Progetto Carta Geologica) at 1:50,000 scale has led to significant improvements in the geological knowledge for the Island of Sardinia (Italy). As a result, about one half of the island now is covered by new geological maps with 1:10,000–1:25,000 accuracy and geological maps at the 1:50,000 scale whose explanatory notes are available electronically. At the beginning of the CARG Project a geological map for Sardinia Island at 1:200,000 scale was published [Carmignani, L. (1996). Carta Geologica della Sardegna (1:200.000). Servizio Geologico Nazionale, Regione Autonoma della Sardegna], summarizing all the geological information available at that time, and a book with explanatory notes for the map was later published [Carmignani, L., Oggiano, G., Barca, S., Conti, P., Salvadori, I., Eltrudis, ... Pasci, S. (2001). Geologia della Sardegna: Note Illustrative della Carta Geologica della Sardegna in scala 1:200.000, Memorie Descrittive della Carta Geologica d'Italia (Vol. 60). Roma: Servizio Geologico d'Italia, 283 pp]. The enclosed Geological map of Sardinia at 1:250,000 scale incorporates all maps of the CARG Project, unpublished author studies and recently published maps and represents the most updated synthesis of an area characterised by a complex geological evolution that, with few exceptions, can be considered continuous during the last 540 Ma. The main events that influenced the geology of the island are the Variscan orogen that deeply involved the passive margin of North Gondwana and then the complex episodes that occurred in the present-day Mediterranean area after the accretion of Pangea up to the opening of the Tyrrhenian basin
Tertiary structures of North Sardinia: A primary control on geothermal resource
No full textNew structural studies carried out in N-Sardinia allowed to reconstruct a 3D model of the Anglona area that account for the thermal circuits hosted in Tertiary strike-slip faults, which crosscut the Variscan basement and form a plumbing network for water hosted in deep seated reservoirs. © Società Geologica Italiana, Roma 2013
L’attrito scrittorio: interazioni tra punico, latino e libico
No full textBoth in the ancient and in the modern world we can observe societies in which different languages and different scripts are present. This article examines situations in which there are differences in the use of various scripts, focusing on ancient North Africa. The author proposes to define these relationships as “writing attrition”, with a writing that can condition the others present in the same context
Invenzione di scritture. Alcuni esempi
No full textIn this article the author compares different traditions about the birth of scriptures; on the one hand, the birth of the runes, invented by the god Odin, of the Cherokee syllabary, invented in 1898 by Sequoyah, and of the Korean alphabet, which came into use in 1446, are described; on the other, the case of Hebrew writing, of which the Tanakh does not give origin. He closes the article with the case of the mnemonic system of the lukasa, of the Luba culture
Segnalazione di un orizzonte carbonatico nella Nurra Paleozoica e suo significato stratigrafico nelle successioni dell'Ercinico Sardo.
No full textGeologia della Catena Ercinica in Sardegna : la Zona Assiale.Guida alla geologia del basamento Paleozoico in Sardegna. Gruppo informale di Geologia Strutturale
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Nematoplana hamata Curini-Galletti & Oggiano & Casu 2002, sp. nov.
No full textNematoplana hamata sp. nov. (gures 5, 8C) Material examined HOLOTYPE: Australia, New South Wales, Byron Bay, town beach, lower intertidal in medium sand (July 1993), whole mount (lactophenol): G21826. Other material. One immature from the type locality studied karyologically (July 1993). Etymology Named after the characteristically hooked shape (lat: hamatus) of the stylet. Description The holotype is about 5 mm long, colourless, entirely ciliated. With two pigmented eye-spots located within the brain capsule. The short, collar-shaped pharynx is located in the posterior fth of the body. Male genital organs. Numerous testes arranged in two irregular rows between vitellaria in front of the pharynx. The copulatory organ consists of an ovoid muscular bulb (about 85 Mm high and 40 Mm wide), provided with a thick outer coating of circular and inner longitudinal musculature, connected basally to a single seminal vesicle. No sperm were seen within the vesicle. Distally, the bulb is provided with a copulatory stylet. The stylet is tubular, and about 110 Mm long. The proximal end is slightly swollen, with a markedly oblique opening. The tube has a constant width (about 9– 10 Mm) for all of its length. The distal fourth of the stylet is bent at nearly 45ss. The distal opening is about 9 Mm in diameter, and is provided with a slit about 20 Mm long. Female genital organs. With two rows of three isolated oocytes each, laterally in front of the pharynx. Vitellaria stretch from behind the brain at the level of the seminal vesicle. Female pore behind the male pore. Karyotype. With n 58. Plates were unsuitable for a karyometrical analysis. Discussion The very long, narrowly cylindrical, distally angled stylet of the new species is unique in the genus. Nematoplan a hamata shares with N. martensi and N. pullolineata the absence of an apophysis. The stylet of N. martensi is, however, straight, distally denticulate, and with a distal spike (see above); that of N. pullolineata is smaller (about 30 Mm), and diOEerently shaped (with a proportionally much smaller distal angled part, and a nearly straight ventral side) (cf. Tajika, 1979).Published as part of Curini-Galletti, M., Oggiano, G. & Casu, M., 2002, The genus Nematoplana Meixner, 1938 (Platyhelminthes: Unguiphora) in eastern Australia, pp. 1023-1046 in Journal of Natural History 36 (9) on pages 1036-1037, DOI: 10.1080/00222930110039585, http://zenodo.org/record/534082
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