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Le “Calciruditi di Calaturo” (Montagne del Morrone); un deposito tardo-orogenico della fine del Pliocene inferiore
No full textThe late Messinian Lago-Mare episode in the Mediterranean Basin: Preliminary report on the occurrence of Paratethyan ostracod faunafrom central Crete (Greece)
No full textDans l’ıˆle de Cre`te, les facie`s du Lago Mare du Messinien supe ́rieur ne sont pas bien connus. Actuellement, la pre ́sence dans l’Iˆle de Cre`te des
de ́poˆ ts post-e ́vaporitiques du Messinien supe ́rieur est une question qui fait de ́bat. Dans ce travail, on pre ́sente les re ́sultats pre ́liminaires des
analyses biostratigraphiques re ́alise ́es sur des e ́chantillons pre ́leve ́s dans des affleurements de la Plaine de Messara`. Pre`s de Faneromeni et Ano
Akria, la limite Mioce`ne/Plioce`ne est bien observable. Ici, les de ́poˆ ts e ́vaporitiques du Messinien sont caracte ́rise ́s par des argiles contenant du gypse, du gypse microcristallin lamine ́ et des gypsorudites. Dans ces zones, on a trouve ́ au-dessus des e ́vaporites du Messinien des argiles
polychromes finement lamine ́es. Les argiles grises et les conglome ́rats du Plioce`ne se trouvent discordants sur les de ́poˆts post-e ́vaporitiques du
Messinien supe ́rieur a` Faneromeni comme a` Ano Akria. Dans les deux coupes, l’e ́chantillonnage a e ́te ́ re ́alise ́ tous les 20 cm (total de 100
e ́chantillons). Les re ́sultats des analyses micropale ́ontologiques montrent la pre ́sence des ostracodes suivants : Loxocauda limata (Schneider in
Agalarova et al.), Loxocauda sp., Cytherura pyrama Schneider, Cyprideis anlavauxensis Carbonnel, Cyprideis agrigentina Decima, Amnicythere
palimpsesta (Livental), Amnicythere propinqua (Livental), Amnicythere accicularia (Olteanu), Amnicythere costata (Olteanu), Amnicythere
multituberculata (Livental), Amnicythere sp. D (Miculan in Bassetti et al.), Amnicythere sp. 2 Gliozzi and Grossi, Amnicythere sp., Euxinocythere
(Maeotocythere) praebaquana (Livental in Agalarova et al.), Mediocytherideini indet., Pontoniella pontica (Agalarova), Camptocypria sp. 1
Gliozzi and Grossi, Caspiocypris sp., Zalanyiella venusta (Zalanyi), Tyrrhenocythere sp., Loxoconcha rhombovalis Pokorny, Loxoconcha
eichwaldi Livental, Loxoconcha sp. A (Miculan in Bassetti et al.), Loxocorniculina djafarovi (Schneider in Suzin). On a trouve ́ aussi dans les
e ́chantillons analyse ́s des foraminife`res planctoniques remanie ́s et des gyrogonites de Characeae bien conserve ́s. Les associations d’ostracodes
trouve ́es dans la Plaine de Messara` appartiennent a` la Zone a` Loxocorniculina djafarovi (sensu Carbonnel, 1978), qui caracte ́rise les de ́poˆ ts du
Messinien supe ́rieur dans tout le bassin me ́diterrane ́en. A cette pe ́riode, le facie`s bien connu du Lago Mare existait aussi dans l’Iˆle de Cre`te. La
pre ́sence des ostracodes parate ́thysiens dans les de ́poˆ ts post-e ́vaporitiques du Messinien, a` Faneromeni et a` Ano Akria, sugge`re que des conditions
de se ́dimentation sous-aquatique en milieu saumaˆtre se sont de ́veloppe ́es en Cre`te pendant le Messinien supe ́rieur.In the Crete Island, late Messinian Lago-Mare facies are not well known. At present, the occurrence in Crete of the uppermost Messinian post
evaporitic deposits is a matter of debate. According to several authors, the well-known late Messinian Lago-Mare facies does not occur in Crete. In
this paper the preliminary results obtained from the biostratigraphical analysis of some sections sampled in the Messara` Plain will be shown.
Nearby Faneromeni and Ano Akria villages, the Miocene/Pliocene boundary is well exposed. There, gypsum-bearing clay, laminated
microcrystalline gypsum and gypsum-rudites characterize the evaporitic deposits of the Messinian stage. In these areas, above the Messinian
evaporite, post-evaporitic fine-laminated polychrome clays, with intercalations of sandstones and conglomerates, have been found. In both the
Faneromeni and Ano Akria area, the Pliocene grey clays and conglomerates rest unconformably on the uppermost Messinian post-evaporitic
deposits. A 20 cm-spaced sampling has been performed in both the sections, for more than 100 samples collected. The results of the
micropaleontological analysis performed on the Faneromeni and Ano Akria sections point to the occurrence of ostracod assemblages containing:
Loxocauda limata (Schneider in Agalarova et al.), Loxocauda sp., Cytherura pyrama Schneider, Cyprideis anlavauxensis Carbonnel, Cyprideis
agrigentina Decima, Amnicythere palimpsesta (Livental), Amnicythere propinqua (Livental), Amnicythere accicularia (Olteanu), Amnicythere
costata (Olteanu), Amnicythere multituberculata (Livental), Amnicythere sp. D (Miculan in Bassetti et al.), Amnicythere sp. 2 Gliozzi and Grossi,
Amnicythere sp., Euxinocythere (Maeotocythere) praebaquana (Livental in Agalarova et al.), Mediocytherideini indet., Pontoniella pontica
(Agalarova), Camptocypria sp. 1 Gliozzi and Grossi, Caspiocypris sp., Zalanyiella venusta (Zalanyi), Tyrrhenocythere sp., Loxoconcha
rhombovalis Pokorny, Loxoconcha eichwaldi Livental, Loxoconcha sp. A (Miculan in Bassetti et al.), Loxocorniculina djafarovi (Schneider
in Suzin). In the analysed samples, reworked planktonic foraminifers and well-preserved charophyte gyrogonites have been also found. The
ostracod assemblages found in the Messara` Plain belong to the Loxocorniculina djafarovi Zone (sensu Carbonnel, 1978), which characterizes the
uppermost Messinian deposits of the whole Mediterranean Basin. At that time, the well-known Lago-Mare biofacies was also widespread on the
Crete Island. The presence of Paratethyan ostracods in the post-evaporitic Messinian deposits of both Faneromeni and Ano Akria sections suggests
that in the Crete Island the latest Messinian sedimentation took place in brackish water palaeoenvironments
Inizio della sedimentazione d’avanfossa nella Maiella Meridionale: la sezione di Fonte dei Pulcini (Taranta Peligna)
No full textIl sistema orogenico dell’Appennino centrale: vincoli stratigrafici e cronologia della migrazione
No full textIl sistema orogenico dell’Appennino centrale: vincoli stratigrafici e cronologia della migrazione
No full textLa sezione di Fonte dei Pulcini (Maiella meridionale): sezione di riferimento per il limite Miocene/Pliocene nella successione preorogena dell’avampaese adriatico
No full textInizio della sedimentazione di avanfossa nella Maiella meridionale: la sezione di Fonte dei Pulcini (Taranta Peligna)
No full text
Late Miocene ostracod assemblages from eastern Mediterranean coral-reef complexes (central Crete, Greece)
No full textOstracods from ten Late Miocene coral reef complexes built by Siderastrea, Tarbellastrea and Porites, cropping out in the Messara Plain (southern
Iraklion basin, central Crete), have been investigated and five assemblages have been recognised, which point to different marine environments: (1)
assemblage from the basal sandy silts, dominated by very shallow inner-infralittoral species, such as Cyamocytheridea meniscus, Cyamocytheridea
obstipa, Cyamocytheridea dertonensis, Cytheretta semiornata and Nonurocythereis seminulum; (2) assemblage from the coral reef complexes within
which Grinioneis haidingeri, Aurila cicatricosa, Cimbaurila diecii, Tenedocythere cruciata, Pokornyella italica and Callistocythere quadrangula
are dominant and point to a stable inner-infralittoral environment characterised by warm, quiet and well-oxygenated waters; (3) assemblage from
the silts intercalated among the coral reef complexes, mainly characterised by Neomonoceratina laskarevi, Cytheridea acuminata, Phlyctenophora
farkasi and Aurila albicans together with Callistocythere spp., Xestoleberis communis and Xestoleberis dispar, which points to a very shallow
marine environment rich in aquatic vegetation; (4) assemblage from the upper silts, which records the absolute dominance of Xestoleberis species,
reflecting a very shallow and highly-vegetated environment and (5) assemblage from the uppermost silty clays, dominated by Hemicytherura
defiorei, Xestoleberis spp. and Palmoconcha dertobrevis, accompanied by Acanthocythereis hystrix, Cytherella scutulum, Bairdoppilata conformis,
Semicytherura spp., Krithe sp., Cytheropteron alatum, Bythocypris sp. and Pseudocythere caudata, which suggest deeper marine environments
probably located in the outer infralittoral/inner-circalittoral zones. The studied section has been dated by means of calcareous nannoplankton to be
not younger than Zone MNN9 (Early Tortonian), which is the biostratigraphical datum recorded in the fine-grained deposits that overlie the coral
reef complexes. An age not older than Tortonian can be inferred by the stratigraphical distribution of the recognized ostracods. Thus, the coral reef
complexes have been tentatively referred to the Early Tortonian
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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