Le microcontinent corso-sarde, sa position initiale: Donnees paleomagnetiques et raccords geologiques

Westphal, M.; Orsini, Jean-Baptiste; Vellutini, Pierre

doi:10.1016/0040-1951(76)90142-6

Cited by 81 publications

(22 citation statements)

References 11 publications

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“…The sea barrier between Corsica and the Iberian peninsula, more than 300 km wide, is the result of the process of separation of the island from the mother-continent, which began 14 million years ago (Wesphal et al 1976in Contrandriopoulos (1981. According to Debazac (1964) black pine from Corsica has been in island isolation since the tertiary era.…”

Section: Discussionmentioning

confidence: 99%

Origin identification of Pinus nigra populations in southwestern Europe using terpene composition variations

Bojović¹,

Jurc

Dražic

et al. 2005

Trees

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The geographical variation of terpenes of Pinus nigra populations from southwestern Europe was studied. Terpenes from the foliage of 16 populations from Corsica, Herault (France) and the East Pyrenees (France and Spain) were analyzed. A total of 42 terpenes were detected, with α-pinene the dominant monoterpene and germacrene-d and caryophyllene the dominant sesquiterpenes. The differences in quantitative content of selected compounds clearly divide populations into two basic geographical groups: on one side the populations from Herault and the East Pyrenees and on the other the populations from Corsica. β-Phellandrene and δ-cadinene have the greatest influence on this global discrimination. Some trees and populations show a similarity although they belong to different geographic locations. The similarity of some trees S. Bojovic ( ) · P. Pavlovic · M. Mitrovic · L. Djurdjevic from Herault and the East Pyrenees and trees from Corsica points to their common origin (Corsica). Our results confirm the hypothesis that the afforestation of Herault and the East Pyrenees was also performed with black pine from Corsica.

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Section: Discussionmentioning

confidence: 99%

Origin identification of Pinus nigra populations in southwestern Europe using terpene composition variations

Bojović¹,

Jurc

Dražic

et al. 2005

Trees

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“…Sardinia and Corsica are made up of continental crust 30 km thick (Morelli et al 1967(Morelli et al , 1976 and are usually considered to be a continental microplate, rotated counterclockwise and translated with respect to Europe (Alvarez 1972;Nairn and Westphal 1968;De Jong et al 1969;Coulon et al 1974;Westphal et al 1976;Beccaluva et al 1985). Their displacement coincided and was accompanied by widespread "andesitic and ignimbritic" volcanism.…”

Section: Sardiniamentioning

confidence: 98%

Italian zeolitized rocks of technological interest

de’Gennaro

Langella

1996

Mineral. Deposita

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Abstract. Large areas of Italian territory are covered by thick and widespread deposits of zeolite-bearing volcaniclastic products. The main zeolites are phillipsite and chabazite spread over the whole peninsula, and clinoptilolite recorded only in Sardinia. A trachytic to phonolitic glassy precursor accounts for the formation of the former zeolites characterized by low Si/A1 ratios (~< 3.00), while clinoptilolite is related to more acidic volcanism. The genesis of most of these zeolitized deposits is linked to pyroclastic flow emplacement mechanisms characterized by quite high temperatures and by the presence of abundant fluids. The main utilization of these materials has been and still is as dimension stones in the building industry. Currently, limited amounts are also employed in animal farming (dietary supplement, pet litter and manure deodorizer) and in agriculture as soil improvement and slow-release fertilizers. New fields of application have been proposed for these products on account of their easy availability, very low cost, their high-grade zeolites (50 70%), and good technological features such as high cation exchange capacities and adsorption properties. minerogenetic processes leading to their formation have received substantial stimulus. In particular, studies have focused on the products of Quaternary volcanism in central-southern Italy, although researches highlighting the presence of zeolitized materials within the Apennine sedimentary successions and Sardinian pyroclastites have also been completed.The extremely complex question of zeolitization has been tackled, taking into account both mineralogical and all the geological, volcanological, petrographical and geomagnetic information required to draw up valid genetic models. Valuable contributions to our knowledge of zeolitization processes have also been provided by laboratory simulations, which followed the evolution of the chemical and mineralogical composition of fluids and solid phases respectively, in the course of the interaction between volcanic glass and solutions.The present study updates knowledge on Italian zeolitized volcaniclastic rocks and the perspectives for their exploitation in technological fields.

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“…The question arose whether the former is basal to the latter or vice-versa. Dune systems of western Sardinia started to form with the split-off of the Cyrno-Sardinian microplate from southern France and northeast Spain in the late Oligocene (c. 30 mya; Westphal et al, 1976;Cherchi & Montadert, 1982;Speranza et al, 2002), suggesting that coastal species derived from orophytic progenitors occurring on pre-existing massifs. Events of colonisation of the sandy coastline may have triggered a process of speciation and adaptive radiation, which led to the origin of the psammophytic taxa.…”

Section: Systematics and Phylogenetic Hypothesesmentioning

confidence: 99%

Systematics, phylogenetic relationships and conservation of the taxa ofAnchusa(Boraginaceae) endemic to Sardinia (Italy)

Bacchetta

Coppi

Pontecorvo

et al. 2008

Systematics and Biodiversity

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Sardinia is a major centre of diversity of Anchusa, but the systematics, phylogenetic relationships and conservation status of the taxa endemic to the island are still poorly known mainly because of their remarkable rarity. We present a study on these endemics based on the results of field research focusing on the distribution, the number and size of the populations, the characteristics of the habitat and the factors of threat. Combined with observations on aspects of reproductive biology, on wild populations and cultivated plants, we evaluate the conservation status of the taxa and propose Red List IUCN categories of vulnerability. Original descriptions, nomenclatural types and karyological data are added. The following Anchusa taxa are endemic to Sardinia: A. capellii, A. crispa ssp. crispa, A. crispa ssp. maritima, A. formosa, A. littorea, A. sardoa and A. montelinasana sp. nov. The latter is described, based on the discovery of a morphologically distinct entity on a mountain in southwest Sardinia. Anchusa littorea was found at a single site after c. 25 years from the last record and 7 years of unsuccessful field research; this species is at the brink of extinction due to the extremely reduced size of the only remaining population. Our complete collection of taxa allowed an analysis of phylogenetic relationships based on DNA sequences from the ITS 1 ribosomal genome. In spite of the low variation, this marker produced Maximum Parsimony and Neighbour-Joining phylograms suggesting that the group is monophyletic and that the split between the two clades of the mountain and coastal endemics has been a key evolutionary event. We assume the three mountain species to be relict schizoendemics ancestral to the coastal taxa, and the Paleozoic siliceous massifs of central and south Sardinia as the centre of origin of the group.

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Le microcontinent corso-sarde, sa position initiale: Donnees paleomagnetiques et raccords geologiques

Cited by 81 publications

References 11 publications

Origin identification of Pinus nigra populations in southwestern Europe using terpene composition variations

Origin identification of Pinus nigra populations in southwestern Europe using terpene composition variations

Italian zeolitized rocks of technological interest

Systematics, phylogenetic relationships and conservation of the taxa ofAnchusa(Boraginaceae) endemic to Sardinia (Italy)

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