1,721,063 research outputs found
7.1. La flora del Giurassico dell'Italia settentrionale. The Jurassic flora of northern Italy (Second reviewed edition)
No full textA Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy)
No full textKustatscher, Evelyn, Martin, Helmut, Roghi, Guido, Krings, Michael (2022): A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy). Fossil Imprint 78 (1): 145-156, DOI: 10.37520/Fi.2022.006, URL: http://dx.doi.org/10.37520/fi.2022.00
Palynomorph analysis from the upper Anisian (Middle Triassic) of the Dolomites (Italy): new biostratigraphic and palaeoclimatic data.
No full textText-fig. 1. Massalongo's original specimens. a: Laminarites irideaephyllus A.MASSAL.; b: Pterigophycos gazolanus A.MASSAL.; c: Pterigophycos canossae A.MASSAL.; d: Pterigophycos spectabilis A.MASSAL. Reproduced from Massalongo (1858: pls 15–17). Scale bars = 1 cm. in A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy)
No full textText-fig. 1. Massalongo's original specimens. a: Laminarites irideaephyllus A.MASSAL.; b: Pterigophycos gazolanus A.MASSAL.; c: Pterigophycos canossae A.MASSAL.; d: Pterigophycos spectabilis A.MASSAL. Reproduced from Massalongo (1858: pls 15–17). Scale bars = 1 cm.Published as part of Kustatscher, Evelyn, Martin, Helmut, Roghi, Guido & Krings, Michael, 2022, A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy), pp. 145-156 in Fossil Imprint 78 (1) on page 146, DOI: 10.37520/Fi.2022.006, http://zenodo.org/record/716777
Text-fig. 5. Reconstruction drawing of Pterigophycos sp. thallus growing on a rock surface (blades slightly simplified, details deemphasized). in A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy)
No full textText-fig. 5. Reconstruction drawing of Pterigophycos sp. thallus growing on a rock surface (blades slightly simplified, details deemphasized).Published as part of Kustatscher, Evelyn, Martin, Helmut, Roghi, Guido & Krings, Michael, 2022, A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy), pp. 145-156 in Fossil Imprint 78 (1) on page 150, DOI: 10.37520/Fi.2022.006, http://zenodo.org/record/716777
Text-fig. 2. Map of the Bolca area, showing all the relevant fossil sites, and map of Italy, with the Bolca area marked by a star. in A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy)
No full textText-fig. 2. Map of the Bolca area, showing all the relevant fossil sites, and map of Italy, with the Bolca area marked by a star.Published as part of Kustatscher, Evelyn, Martin, Helmut, Roghi, Guido & Krings, Michael, 2022, A Whole-Plant Specimen Of The Marine Macroalga Pterigophycos From The Eocene Of Bolca (Veneto, N-Italy), pp. 145-156 in Fossil Imprint 78 (1) on page 147, DOI: 10.37520/Fi.2022.006, http://zenodo.org/record/716777
The Buntsandstein of Sardinia (Italy) as keypoint of the Western Tethys paleogeography
No full textSardinia played a key role during the opening of the Western Tethys in late Early-early Middle Triassic times, being located at the intersection of several main paleogeographic plates, and its Buntsandstein successions represent a revealing paleogeographic and sedimentary touchstone. Historical and unedited sedimentological data, detailed petrographic studies, and a review of the palynological assemblages evidence that the various formations of the Sardinian Buntsandstein Group differ noticeably from each other and were deposited in different alluvial to transitional environments related to “Alpine” rifting basins. Moreover, strong compositional differences from NS to EW in the island are also observed. They support a morphotectonic rise separating the diverse depositional basins, possibly related to main European ridges in progressive dismantling. The dominating environmental and/or (micro)climate conditions were different in the various areas, and the sedimentary basins evolved independently and diachronous through time. Moreover, the source areas for the sediments varied from articulated to gentle in morphology and substrate composition. The various stratigraphic units of the Sardinian Buntsandstein cover in the center of the island a progressively more altered, smoothed Variscan basement, locally perhaps mobilized by the incoming extensional early Alpine tectonics.
The paleoenvironmental reconstructions evidence an articulated, rough landscape, close to active structural lines, behind the depositional area of the SW Riu Is Corras Formation. A more elaborated depositional environment gave origin to the SW Punta S’Arridelli and NW Verrucano Sardo formations, whereas a flat, gentle landscape crossed by alluvial channels was located behind the mudflat of the Central Sardinia Escalaplano Formation. These diverse environments could be related to a gradual transgression over the hardrock and a progressive smoothing in time of the Sardinian Variscan basement. The petrographic study reveals the presence of sandstone and carbonate grains of unknown affinity in every Buntsandstein formational unit, possibly related to a dismantled sedimentary cycle. The palynoassemblages support a late Anisian or Pelsonian-Illyrian for the transgression of the Muschelkalk Sea on the Buntsandstein facies, whereas the bottom of the various formations cannot be dated due to a substantial unconformity. The oldest Triassic palynological assemblages identified in the succession are dated to the Aegean. They do, however, not correspond to the base of the Buntsandstein succession. In general, the palynological assemblages support a rather arid climate during the early Middle Triassic, although locally some more humid conditions are observed.
A comparison with nearby coeval plates of the western, subequatorial area of the Tethys (Western Alps, Corse, Provence) evidences the area’s key role during the opening of the “Alpine” rifting basins
Paleoenvironmental data from the amber-bearing levels of the Rotzo formation (Pliensbachian, Lower Jurassic), Monti Lessini (Verona, Italy)
No full textThe first discovery of in situ Verrucosisporites applanatus spores from the Middle Triassic flora from Bromsgrove (Worcestershire, UK)
No full textTriassic plant remains are uncommon globally, with few Early-Middle Triassic floras well documented. Thus, the Middle Triassic (Anisian) of Bromsgrove, Worcestershire, UK provides new insights into the terrestrial biota at this time and is extremely valuable since it provides the majority of fossil plants from the UK terrestrial Triassic sequence. This small but diverse flora comprises typical gymnospermous (Willsiostrobus, Pelourdea) and sphenopterid (Schizoneura, Neocalamites) elements of an Anisian-age flora. Reinvestigation of megafossil remains led to the discovery of a previously unknown and undescribed plant fossil with in situ spores, Bromsgrovia willsii gen. et sp. nov. The in situ spores were extracted and examined by light, scanning electron and transmission electron microscopy. The Bromsgrove Anisian flora is summarized and illustrated along with the first occurrence of in situ Verrucosisporites applanatus spores, a marker for the Middle Triassic. The parent plant of V. applanatus is suggested to be a horsetail with an unusual morphology. (C) 2013 Elsevier B.V. All rights reserved
First record of plant fossils from the Upper Muschelkalk (late Anisian, Middle Triassic) at Bruchsal (Baden-Württemberg, Germany)
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