Radiolaires triasiques non téthysiens de Nouvelle-Zélande et du Nord-Est de la Sibérie

Des radiolaires bien conservés du Trias moyen ont été découverts dans des nodules phosphatés provenant des formations Waipapa, en Nouvelle-Zélande et du massif Omolon, au Nord-Est de la Sibérie. Les deux faunes comprennent de nombreuses espèces bien connues en Europe de la zone téthysienne, incluant Silicarmiger costatus costatus Dumitrica, Kozur &amp; Mostler, 1980 qui indiquent un âge Ladinien inférieur. Ces espèces Téthysiennes existent avec de nombreux radiolaires non-téthysiens, caractéristiques de ces faunes. Parmi eux des spumellaires à pylome sont décrits dont le nouveau genre Glomeropyle Aita &amp; Bragin. Ce genre n\u27avait pas encore été trouvé dans les séries du Trias moyen d\u27Europe, du Japon, d\u27Asie du Sud-Est et d\u27Amérique du Nord. Sept nouvelles espèces du Trias moyen sont décrites : Glomeropyle aurora, G. boreale, G. poinui, G. (?) galagala, G. grantmackiei, G. mahinepuaensis, G. waipapaensis. Elles n\u27ont pas d\u27affinités téthysiennes et sont seulement connues dans les hautes latitudes (Nord et Sud). Ces faunes triasiques ont donc une distribution bipolaire.Well-preserved Middle Triassic radiolarian faunas have been documented from phosphatic nodules collected from the Waipapa Terrane, New Zealand and the Omolon Massif, northeastern Siberia, respectively. Both New Zealand and northeastern Siberia faunas include many species that are well-known from European Tethys area, including Silicarmiger costatus costatus Dumitrica, Kozur &amp; Mostler, 1980 which indicates an early Ladinian age. These Tethyan species occur with abundant non-Tethyan radiolarians that are characteristic of these faunas. Distinctive pylomate spumellarians are described herein as a new genus Glomeropyle Aita &amp; Bragin. This genus has not been recognized in Middle Triassic sequences of Europe, Japan, Southeast Asia or North America. Seven new Middle Triassic species are described: Glomeropyle aurora, Glomeropyle boreale, Glomeropyle poinui, Glomeropyle (?) galagala, Glomeropyle grantmackiei, Glomeropyle mahinepuaensis, Glomeropyle waipapaensis. They do not haveTethyan affinities and are only known from northern and southern high latitudes. They are Triassic Radiolaria with a bipolar distribution pattern.</p

Early Norian Radiolaria from Cyprus

Volume: 21Start Page: 539End Page: 56

Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance

Oceanic radiolarite components from the Middle Jurassic ophiolitic mélange between Trnava and Rožanstvo in the Zlatibor Mountains (Dinaridic Ophiolite Belt) west of the Drina–Ivanjica unit yield Late Triassic radiolarian ages. The microfacies characteristics of the radiolarites show pure ribbon radiolarites without crinoids or thin-shelled bivalves. Beside their age and the preservation of the radiolarians this points to a deposition of the radiolarites on top of the oceanic crust of the Neo-Tethys, which started to open in the Late Anisian. South of the study area the ophiolitic mélange (Gostilje–Ljubiš–Visoka–Radoševo mélange) contains a mixture of blocks of 1) oceanic crust, 2) Middle and Upper Triassic ribbon radiolarites, and 3) open marine limestones from the continental slope. On the basis of this composition we can conclude that the Upper Triassic radiolarite clasts derive either from 1) the younger parts of the sedimentary succession above the oceanic crust near the continental slope or, more convincingly 2) the sedimentary cover of ophiolites in a higher nappe position, because Upper Triassic ribbon radiolarites are only expected in more distal oceanic areas. The ophiolitic mélange in the study area overlies different carbonate blocks of an underlying carbonate-clastic mélange (Sirogojno mélange). We date and describe three localities with different Upper Triassic radiolarite clasts in a mélange, which occurs A) on top of Upper Triassic fore-reef to reefal limestones (Dachstein reef), B) between an Upper Triassic reefal limestone block and a Lower Carnian reef limestone (Wetterstein reef), and C) in fissures of an Upper Triassic lagoonal to back-reef limestone (Dachstein lagoon). The sedimentary features point to a sedimentary and not to a tectonic emplacement of the ophiolitic mélange (= sedimentary mélange) filling the rough topography of the topmost carbonate-clastic mélange below. The block spectrum of the underlying and slightly older carbonate-clastic mélange points to a deposition of the sedimentary ophiolitic mélange east of or on top of the Drina–Ivanjica unit

New stratigraphic and palaeogeographic data on Upper Jurassic to Cretaceous deposits from the eastern periphery of the Russian Platform (Russia)

Volume: 21Start Page: 347End Page: 36

Photostimulation of brain lymphatics in male newborn and adult rodents for therapy of intraventricular hemorrhage

Abstract Intraventricular hemorrhage is one of the most fatal forms of brain injury that is a common complication of premature infants. However, the therapy of this type of hemorrhage is limited, and new strategies are needed to reduce hematoma expansion. Here we show that the meningeal lymphatics is a pathway to remove red blood cells from the brain’s ventricular system of male human, adult and newborn rodents and is a target for non-invasive transcranial near infrared photobiomodulation. Our results uncover the clinical significance of phototherapy of intraventricular hemorrhage in 4-day old male rat pups that have the brain similar to a preterm human brain. The course of phototherapy in newborn rats provides fast recovery after intraventricular hemorrhage due to photo-improvements of lymphatic drainage and clearing functions. These findings shed light on the mechanisms of phototherapy of intraventricular hemorrhage that can be a clinically relevant technology for treatment of neonatal intracerebral bleedings