Discontinuities in carbonate successions: identification, interpretation and classification of some Italian examples

Clari, Pierangelo; Pierre, Francesco Dela; Martire, Luca

doi:10.1016/0037-0738(95)00113-1

Cited by 111 publications

(102 citation statements)

References 37 publications

(49 reference statements)

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“…As with clastics too, these geometries are defined by the bounding surfaces that include those formed during and following transgressions (TS and MFS) and those that formed during falls in sea level as regressive surfaces (SBs). Physical erosion, burrowing, boring, dissolution (Clari et al 1995 James 2003), and/or cementation may have modified these surfaces. Whatever their origin, these surfaces mark changes in the depositional regime, particularly base level, and provide a convenient means to subdivide the carbonate section.…”

Section: Framework Of Carbonate Sequence Stratigraphic Geometriesmentioning

confidence: 99%

Sequence Stratigraphy: Methodology and Nomenclature

Catuneanu

Galloway

Kendall

et al. 2011

nos

750

460

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Abstract. The recurrence of the same types of sequence stratigraphic surface through geologic time defines cycles of change in accommodation or sediment supply, which correspond to sequences in the rock record. These cycles may be symmetrical or asymmetrical, and may or may not include all types of systems tracts that may be expected within a fully developed sequence. Depending on the scale of observation, sequences and their bounding surfaces may be ascribed to different hierarchical orders. Stratal stacking patterns combine to define trends in geometric character that include upstepping, forestepping, backstepping and downstepping, expressing three types of shoreline shift: forced regression (forestepping and downstepping at the shoreline), normal regression (forestepping and upstepping at the shoreline) and transgression (backstepping at the shoreline). Stacking patterns that are independent of shoreline trajectories may also be defined on the basis of changes in depositional style that can be correlated regionally. All stratal stacking patterns reflect the interplay of the same two fundamental variables, namely accommodation (the space available for potential sediment accumulation) and sediment supply. Deposits defined by specific stratal stacking patterns form the basic constituents of any sequence stratigraphic unit, from sequence to systems tract and parasequence. Changes in stratal stacking patterns define the position and timing of key sequence stratigraphic surfaces. Precisely which surfaces are selected as sequence boundaries varies as a function of which surfaces are best expressed within the context of the depositional setting and the preservation of facies relationships and stratal stacking patterns in that succession. The high degree of variability in the expression of sequence stratigraphic units and bounding surfaces in the rock record means ideally that the methodology used to analyze their depositional setting should be flexible from one sequence stratigraphic approach to another. Construction of this framework ensures the success of the method in terms of its objectives to provide a process-based understanding of the stratigraphic architecture. The purpose of this paper is to emphasize a standard but flexible methodology that remains objective.

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Section: Framework Of Carbonate Sequence Stratigraphic Geometriesmentioning

confidence: 99%

Sequence Stratigraphy: Methodology and Nomenclature

Catuneanu

Galloway

Kendall

et al. 2011

nos

750

460

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show abstract

“…In the sedimentary successions, the lithostratigraphic units are grouped into Synthems, bounded by unconformities (International Stratigraphic Guide, http://www.stratigraphy.org/index.php/icsstratigraphicguide). The identification of unconformities is based on objective criteria (presence at the base of an angular unconformity; erosional truncation; abrupt facies contrast or composition change, contravening the 'Walther rule') that can be used in the field without the use of biostratigraphy (Clari, Dela Pierre, & Martire, 1995). The Metasedimentary successions have been subdivided in lithostratigraphic units grouped into informally defined 'parasynthems' which can be correlated through the different tectonic units of the Piemonte Western Alps on the basis of their primary lithologic or stratigraphic characters (see below for further details).…”

Section: How To Read the Mapmentioning

confidence: 99%

Geology of Piemonte region (NW Italy, Alps–Apennines interference zone)

et al. 2017

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The geological map of Piemonte Region (Italy) is a graphic representation of the geology of the region, grounded on a large geodatabase, that can be also browsed as an interactive scalable map (GeoPiemonte Map) using a WebGIS application. The Map, produced at 1:250,000 scale, is the first original release of the 'GeoPiemonte Map' project. The geological data represented on the map derive from a thorough revision of available geological maps and literature, integrated with unpublished original data. The revision and harmonisation of existing and new data have been based on explicit criteria used for the classification of geologic units and their representation on the Map. These criteria firstly aimed at providing a lithostratigraphic, hierarchic subdivision of Piemonte geologic units and describing them using shared concepts and vocabularies, consistent with IUGS Descriptive Standards for the Geosciences. ARTICLE HISTORY

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“…3). Special attention has been paid to sedimentary structures and to omission surfaces (Clari et al 1995;Hillgärtner 1998). The sum of this sedimentological information is then used to interpret the depositional environments.…”

Section: Methodsmentioning

confidence: 99%

Astronomical time scale for the Middle Oxfordian to Late Kimmeridgian in the Swiss and French Jura Mountains

Strasser

2007

Swiss j geosci

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Detailed investigation of facies and sedimentary structures reveals that, during the Middle Oxfordian to Late Kimmeridgian, the shallow carbonate platform of the Swiss and French Jura Mountains recorded high-frequency sea-level fluctuations quite faithfully. The cyclostratigraphic analysis within the established biostratigraphic and sequence-chronostratigraphic framework implies that the resulting hierarchically stacked depositional sequences formed in tune with the orbital cycles of precession (20 kyr) and eccentricity (100 and 400 kyr). The astronomical time scale presented here is based on the correlation of 19 platform sections and 4 hemipelagic sections from south-eastern France where good biostratigraphic control is available. The cyclostratigraphic interpretation suggests that the interval between sequence boundaries Ox4 and Kim1 (early Middle Oxfordian to earliest Kimmeridgian) lasted 3.2 myr and that the Kimmeridgian sensu gallico has a duration of 3.2 to 3.3 myr. The astronomical time scale proposed here is compared to time scales established by other authors in other regions and the discrepancies are discussed. Despite these discrepancies, there is a potential to estimate the durations of ammonite zones and depositional sequences more precisely and to better evaluate the rates of sedimentary, ecological and diagenetic processes.

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Discontinuities in carbonate successions: identification, interpretation and classification of some Italian examples

Cited by 111 publications

References 37 publications

Sequence Stratigraphy: Methodology and Nomenclature

Sequence Stratigraphy: Methodology and Nomenclature

Geology of Piemonte region (NW Italy, Alps–Apennines interference zone)

Astronomical time scale for the Middle Oxfordian to Late Kimmeridgian in the Swiss and French Jura Mountains

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