1,721,057 research outputs found
Il margine settentrionale del Cretacico superiore della Piattaforma Apula (Montagna della Maiella). Escursione n. 2
No full textEscursione Geologica sulla Montagna della Maiella in occasione della 83^ Riunione Estiva, Escursione n. 2., della Società Geologica Italiana tenutasi a Chieti il 15 Settembre 2006. In questa escursione sono stati esposti i caratteri stratigrafici e strutturali principlai del margine orientale della Piattaforma Apula affiorante nella Maiella. Sono stati efettuati diversi stop al fine di illustrare e discutere l'evoluzione stratigrafica del margine durante il Cretaceo.
Il Dr. Morsilli ha curato gli aspetti scientifici insieme ai colleghi dell'Università di Chieti
Stratigraphie séquentielle et analyse de l'espace disponible du Jurassique supérieur et du Crétacé inférieur du Bassin de Paris.
No full textProvenance of Upper Pliocene conglomerates of the Mutignano Formation (Abruzzo, Italy) : implications for unraveling the uplift history of the external zones of Central Apennines
No full textThe Maiella escarpment (Apulia platform, Italy): geology and modelling of an Upper Cretaceous scalloped erosional platform margin
No full textThis report focuses on one of the most debated features of the
Maiella geology, i.e. the «paleoescarpment», a ca. 1000 m high erosional
surface, abruptly separating Cretaceous slope from platform
facies. The attempt has been to address some crucial questions such
as the reconstruction of a morphologic model applicable to the
entire exhumed portion of the Maiella escarpment, and to investigate
the relationships between the paleoescarpment morphology and
mechanisms responsible for the platform margin erosion.
Two-dimensional data, three-dimensional reconstruction and
quantitative simulation, enable a reconciliation between the tectonic
and sedimentary interpretation of the erosional mechanisms of the
Maiella margin. Tectonic mechanisms, associated with the activity
of a fault system and earthquake swarms, trigger sedimentary
processes, such as imposing landslides, producing the erosion of the
Maiella platform margin and its scalloped morphology
Quantitative analysis of Upper Jurassic Ellipsactinia limestones: examples from the Lazio-Abruzzi platform margin (Central Apennines, Italy)
No full textNew geological constraints for the extension of northern Apulia platform margin west of the Maiella Mt. (Central Apennines, Italy).
No full textEvent stratigraphy and correlation between two sectors of the Apulia carbonate platform during the Cretaceous (Italy)
No full textIsolated carbonate platforms of the Mediterranean and their seismic expression — Searching for a paradigm
No full textIsolated carbonate platforms (ICPs) are spectacular features of Mediterranean geology. There has been a resurgence of interest in the resource potential of ICPs in the region following recent exploration success in this play in the eastern Mediterranean. These features have developed in the context of the geologic evolution of the Mediterranean region over the last 250 million years. Their depositional architecture and seismic expression can be very different from that of isolated platforms developed elsewhere and at different times, particularly the Tertiary platforms of Southeast Asia that have formed the basis of much of the industry literature on the seismic characteristics of ICPs. Important differences arise from the fact that Mediterranean ICPs developed on microcontinents in an active tectonic environment featuring both extension and compression, from the range of carbonate factories that have characterized their development, and from the prolonged nature of exposure that they have periodically experienced.
These differences can render the application of some criteria documented in the literature for identification of ICPs problematic in a Mediterranean context. While it is difficult to propose universally applicable criteria for identifying Mediterranean ICPs, locating and mapping the position of the platform slope, often relatively easily identified on seismic data except where hidden by subsequent compressional deformation, is probably the most
robust criteria
Carbonate production of ancient debris-dominated reefs: An outcrop-based example from the Upper Jurassic Reef Complex of the central Apennines (Italy)
No full textThis study provides the fi rst quantitative
carbonate production estimate of an ancient
debris reef, represented by the Upper Jurassic
reef complex of the central Apennines.
The components of carbonate production
(Pnet, Psed, and Pgross) have been defi ned
entirely on the basis of outcrop data. The reef
volume (Pnet) was reconstructed based on
the present distribution of the Upper Jurassic
reef complex and its relationship with
coeval successions of platform and slope.
The volume of sediment exported along the
slope (Psed) was obtained through the reconstruction
of the thickness reduction pattern
of the reef-derived sediments, at increasing
distances from the platform margin. Several
variables have been introduced to overcome
the lack of data in some areas.
The estimates obtained indicate that the
Upper Jurassic reef complex produced a total
amount of calcium carbonate equal to 1.7–2.3
times the amount of material retained in the
reef complex. This excess volume of sediment
produced was redistributed along the slopebasin
system, up to a distance of ~55 km
from the platform margin. According to the
indices commonly used for quantifying carbonate
production, the Upper Jurassic reef
shows values that are consistently lower than
other ancient and Holocene reef systems.
The interaction between the sedimentologic
characteristics of the reef structure and the
hydrodynamic processes is ultimately seen as
the main mechanism responsible for the low
growth potential and reduced export of reef
material. The methodology and the procedure
used were designed specifi cally for the
site being studied but could potentially be
adapted for use in other regions where the
data required are diffi cult to access
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