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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
San Severino Marche Italy
All the People of Israel Are Friends: An Unknown Mid‐Fifteenth Century Earthquake in the Marche Region (Central Italian Apennines) Recorded in a Coeval Hebrew Manuscript Available to Purchase
Local Site Effects and Incremental Damage of Buildings during the 2016 Central Italy Earthquake Sequence Available to Purchase
Geology and Cultural Heritage: characterization and provenance of local stones and spolia used in the Romanesque façade of Santa Maria della Piazza church (Ancona, Central Italy) Available to Purchase
Naturally Occurring Asbestiform Minerals in Italian Western Alps and in Other Italian Sites Available to Purchase
SEA99: A revised ground motion prediction relation for use in extensional tectonic regimes Available to Purchase
Performance of Reinforced Concrete Buildings during the 2002 Molise, Italy, Earthquake Available to Purchase
Perceptions of Decision-Making Roles and Priorities that Affect Rebuilding after Disaster: The Example of L'Aquila, Italy Available to Purchase
The 1944 eruption of Vesuvius, Italy: combining contemporary accounts and field studies for a new volcanological reconstruction Available to Purchase
A Prioritization Scheme for Seismic Intervention in School Buildings in Italy Available to Purchase
Unveiling the Sources of the Catastrophic 1456 Multiple Earthquake: Hints to an Unexplored Tectonic Mechanism in Southern Italy Available to Purchase
Orogenic evolution of the northern Calabria–southern Apennines system in the framework of the Alpine chains in the central-western Mediterranean area Available to Purchase
Scaling laws and spectral parameters of the ground motion in active extensional areas in Italy Available to Purchase
SEG Newsletter 93 (April) Available to Purchase
Brittle deformation and hydrothermal alteration in the Barra Velha Formation, Santos Basin, offshore Brazil Open Access
Detailed mapping and paleostress analysis of active faults in the northern Vettore–Bove fault zone, Sibillini Mountains, Italy Available to Purchase
ABSTRACT The Sibillini Mountains, which make up the southern part of the Umbria-Marche Apennines, were struck by a series of earthquakes in 2016, including five with magnitudes greater than 5. The largest event, M w 6.5, occurred on 30 October 2016. A M w 5.9 earthquake on 26 October ruptured several faults in the northern third of the Vettore–Bove fault system, and the M w 6.5 event produced surface ruptures along the entire 30-km length. Ground surveys conducted shortly after these earthquakes showed that many, but not all, of the surface ruptures corresponded to previously mapped faults. Also, some faults that had been mapped as Quaternary did not produce surface ruptures during the earthquakes. In this study, we present the results of detailed field mapping that was conducted prior to the 2016 earthquakes and provide evidence that all of the surface ruptures in the northern part of the Vettore–Bove fault system occurred along preexisting faults. Paleostress analysis shows that the reactivated faults had been active prior to 2016 in stress fields with similar orientations to the modern-day stress field. In addition, we show that one fault segment, which is the southern continuation of a major fault that slipped during the 2016 earthquakes, was not reactivated because it was unfavorably oriented.
Model for development of small carbonate platforms in the Umbria-Marche Apennines supported by strontium isotope stratigraphy Available to Purchase
ABSTRACT The objective of this research was to determine the age relationships between Early Jurassic sedimentary units in the Umbria-Marche Apennines using strontium isotope stratigraphy. These age relations are critical for evaluating the mechanism by which the small platforms in the region formed. I present an alternative model for carbonate platform differentiation and evolution based on the strontium isotope data; this model relies primarily on growth of individual small platforms through differential sediment accumulation rather than the generally accepted model of extensive late-stage faulting. Strontium isotope stratigraphy provides a high-resolution correlation tool for the region. Because 87 Sr/ 86 Sr values steadily decrease in the Hettangian–Pliensbachian section of the Early Jurassic, they illuminate relationships in different carbonate facies very well. This is particularly valuable where physical and/or biostratigraphic correlation is difficult, such as in the Umbria-Marche carbonate platforms. Strontium isotopic ratios from measured basinal stratigraphic sections along the Burano and Bosso Rivers indicate that at least a 100 m section of the Corniola Formation was deposited while adjacent platforms continued to grow. The small Umbria-Marche platforms drowned synchronously in the late Sinemurian, based on 87 Sr/ 86 Sr values from several platforms at the end of Calcare Massiccio Formation deposition. Measured 87 Sr/ 86 Sr values for all platforms are the same within error. These stratigraphic relationships indicate that differentiation into shallow- and deep-water facies occurred in the latest Triassic/earliest Jurassic, early in the development of the margin. Current models explain the differentiation of platforms and basins by late-stage extensive normal faulting, requiring hundreds of meters of stratigraphic throw. Large-displacement faults are not consistent with the age relations determined by strontium isotope stratigraphy in the region. Minor faulting in the Late Triassic coupled with growth by differential sediment accumulation of small, shallow-water carbonate platforms continuing for several million years would produce the exposed platform/basin relationships. Inferred accumulation rates for the platform and basin sequences suggest that the observed relief of the platform escarpments was generated in less than 7 m.y., a time period consistent with the documented stratigraphy in the region.