Contribution of calcareous nannoplankton to carbonate deposition: a new approach applied to the Lower Jurassic of central Italy

2002 ◽  
Vol 45 (2) ◽  
pp. 175-190 ◽  
Author(s):  
Emanuela Mattioli ◽  
Bernard Pittet
1998 ◽  
Vol 17 (2) ◽  
pp. 153-172 ◽  
Author(s):  
Raffaella Bucefalo Palliani ◽  
Emanuela Mattioli

Abstract. The integrated use of calcareous nannofossil and dinoflagellate cyst events in a study of the late Pliensbachian–early Toarcian interval in central Italy has yielded a high resolution biostratigraphy. The use of both the first and last occurrences of selected taxa belonging to the two phytoplankton groups allows the dating of the sediments with a very refined detail, even when lithologies are unfavourable to the preservation of one fossil group. The evolutionary history of calcareous nannofossils and dinoflagellate cysts during the early Jurassic and its links with global events are responsible for the high potential of this integrated biostratigraphy.


2021 ◽  
Vol 21 (19) ◽  
pp. 523-532
Author(s):  
Riccardo Manni ◽  
Rolando Di Nardo

A new paracomatulid crinoid, Tiburtocrinus toarcensis gen. et sp. nov., is described from the Lower Jurassic of Tivoli (central Apennines, Italy). This type of stemless crinoids has never previously been recorded in Italy, and this report bridges a significant gap. Morphofunctional analysis of the radial facets suggests that Tiburtocrinus toarcensis gen. et sp. nov. may have been a crawling paracomatulid, very different from other paracomatulids that probably swam.


2007 ◽  
Vol 7 (4) ◽  
pp. 473-478 ◽  
Author(s):  
F. Masci ◽  
P. Palangio ◽  
M. Di Persio ◽  
C. Di Lorenzo

Abstract. In the middle of 1989, the INGV (Italian Istituto Nazionale di Geofisica e Vulcanologia) installed in Central Italy a network of magnetic stations in order to investigate possible relationship of the local magnetic field with earthquakes occurrences. Actually the network consists of four stations, where the total magnetic field intensity data are being collected using proton precession magnetometers. Here we are report on the actual state and the future developments of the network. In the frame of the MEM (Magnetic and Electric fields Monitoring) Project, new stations will be added to the network by the end of 2007. The results of the test campaigns carried out in the sites chosen to widen the network are also discussed. Moreover, the 2006 complete data set of the network is also reported. Concerning the data analysis, a new approach is also discussed that takes into account the inductive effects on the local geomagnetic field by means of the inter-station transfer functions time variations analysis.


2005 ◽  
Vol 97 (6) ◽  
pp. 1537-1542 ◽  
Author(s):  
Marco Fornaciari ◽  
Fabio Orlandi ◽  
Bruno Romano

Author(s):  
Alexander M. Puzrin ◽  
Thierry Faug ◽  
Itai Einav

Snow avalanches can be triggered by strong earthquakes. Most existing models assume that snow slab avalanches happen simultaneously during or immediately after their triggering. Therefore, they cannot explain the plausibility of delayed avalanches that are released minutes to hours after a quake. This paper establishes the basic mechanism of delays in earthquake-induced avalanche release using a novel analytical model that yields dynamics consistent with three documented cases, including two from Western Himalaya and one from central Italy. The mechanism arises from the interplay between creep, strain softening and strain-rate sensitivity of snow, which drive the growth of a basal shear fracture. Our model demonstrates that earthquake-triggered delayed avalanches are rare, yet possible, and could lead to significant damage, especially in long milder slopes. The generality of the model formulation opens a new approach for exploring many other problems related to natural slab avalanche release.


2016 ◽  
Vol 409 ◽  
pp. 182-194 ◽  
Author(s):  
Elisa Nicoud ◽  
Daniele Aureli ◽  
Marina Pagli ◽  
Valentina Villa ◽  
Christine Chaussé ◽  
...  

2021 ◽  
Vol 14 (3) ◽  
Author(s):  
Laura Valentini ◽  
Olivia Nesci

AbstractBorn from a desire to promote the landscape by integrating its origins and physical aesthetics with its naturalistic, cultural, and artistic heritage, we develop narratives about three locations in central Italy, telling them in the language of popular science, supported by the language of art. The different disciplines of science, poetry, and ancient music are applied to the same sites, producing emotional experiences where the encounter and interplay between different representations, and combinations of representations, become an expression of a place. The research introduces three geosites from the Marche Region, central Italy: I Sassi Simone e Simoncello, La Grotta della Beata Vergine di Frasassi, and the Infernaccio Gorge, in order to propose our multidisciplinary approach to the international public. These have been chosen for their value and charm, for their different processes of genesis and evolution, and for the cultural context and feelings they evoke. In a new approach to science communication, our study uses art in the form of music and poetry to encourage people to learn about landscapes. The paper explains the genesis and evolution of the three places, suggests trekking itineraries, includes a poem written specifically for each site, and describes a piece of ancient music and video and cultural offerings relating to each location. Our goal is to educate by fashioning a new perception of landscapes, starting with their physical beauty, and then building on scientific research in co-operation with arts, to improve what we know about their problems and weaknesses, but also about their culture and other strengths.


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