Stratigraphy and depositionalenvironments of the lower cretaceous in the Karst region of the outer Dinarides (yugoslavia)

Velić, Ivo; Tišljar, Josip; Sokač, Branko

doi:10.1016/s0016-6995(79)80066-2

Cited by 8 publications

(3 citation statements)

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“…The pronounced Late Aptian regression documented for the study area corresponds to a significant biological crisis on numerous Mediterranean platforms (Masse 1989). A globally recorded sea-level fall and subsequent sediment exposure is represented by brecciated exposure intervals developed on the three separate peri-Adriatic platforms (e.g., Velić et al 1979;Sartorio 1992;Gušić and Jelaska 1993;Bravi and De Castro 1995).…”

Section: Regional Correlation Of Eventsmentioning

confidence: 91%

Relative Sea-Level Changes Recorded on an Isolated Carbonate Platform: Tithonian to Cenomanian Succession, Southern Croatia

Husinec¹,

Jelaska²

2006

Journal of Sedimentary Research

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Superb sections of Tithonian to Cenomanian carbonates of the Adriatic (Dinaric) platform are exposed on the islands of southern Croatia. A succession approximately 1,800 m thick consists exclusively of shallow-water marine carbonates (limestone, dolomitized limestone, dolomite, and intraformational breccia), formed in a protected and tectonically stable part of the platform interior. Several phases of exposure and incipient drowning are recorded in the platform interior. Four are crucial for understanding the Late Jurassic to mid-Cretaceous evolution of the wider peri-Adriatic area: (1) latest Jurassic-earliest Cretaceous sea-level fall, (2) Aptian drowning, followed by (3) Late Aptian platform exposure, and (4) Late Albian-Early Cenomanian sea-level fall. Deciphering these complex events from the vertical and lateral facies distribution has led to an evaluation of facies dynamics and construction of a relative sea-level curve for the study area. This curve shows that long-term transgression during the Early Tithonian, Hauterivian, Early Aptian, and Early Albian, resulted in generally thicker beds deposited in subtidal environments of lagoons or shoals. Regression was characterized by shallowing-upward peritidal parasequences, with well-developed tidal-flat laminites commonly capped by emersion breccia and/or residual clay sheets (Early Berriasian, Barremian, Late Aptian, Late Albian). The southern part of the Dinarides was tectonically quiet during the Tithonian through Aptian; sea-level oscillations appear to have been the primary control on facies stacking. Some correlation exists between local sea-level fluctuations and the published global eustasy charts for the Tithonian through Aptian. A significant departure is recognized at the Albian-Cenomanian transition, suggesting that it was influenced by tectonics associated with the disintegration of the Adriatic (Dinaric) platform.

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Section: Regional Correlation Of Eventsmentioning

confidence: 91%

Relative Sea-Level Changes Recorded on an Isolated Carbonate Platform: Tithonian to Cenomanian Succession, Southern Croatia

Husinec¹,

Jelaska²

2006

Journal of Sedimentary Research

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“…The regional distribution and depositional environments for many of the facies of the southern part of the Adriatic platform have been studied extensively (e.g., Veli( et al, 1979;Ti¢ljar and Veli(, 1991;Ti¢ljar et al, 2002;Husinec, 2002;Vlahovi( et al, 2005;Husinec and Jelaska, 2006). The mid-Cretaceous platform-interior facies of the study area include emersion breccia or residual clay (subaerial exposure), fenestral carbonates and microbial laminites (tidal flat), intraclast-bioclast-peloid packstone and grainstone (shoal water), skeletal-peloid mudstone, wackestone, and packstone (lagoon-subtidal), and dolomite.…”

Section: Lithofacies and Depositional Environmentsmentioning

confidence: 99%

Diversity Patterns in Mid-Cretaceous Benthic Foraminifers and Dasycladalean Algae of the Southern Part of the Mesozoic Adriatic Platform, Croatia

Husinec¹,

Velić²,

Sokač³

2009

Geologic Problem Solving With Microfossils

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The Mesozoic, mid-Cretaceous (Barremian to Cenomanian) deposits of southern Croatia comprise a succession of shallow tropical-water, inner-platform deposits that formed on a Bahama-type isolated Adriatic carbonate platform in the Dinarides. This succession is dominated by benthic foraminifers and dasycladalean algae, and is exposed in a nearly continuous outcrop section on the islands and along the coast of southern Croatia. It has been studied in terms of sedimentary facies, paleoecology, and biostratigraphy. The present study documents that several species of benthic foraminifers (cuneolinids, orbitolinids, alveolinids) and dasycladalean algae (Salpingoporella) have exceptional age-diagnostic value for mid-Cretaceous biostratigraphy. These are abundant, and they have a widespread distribution and a restricted stratigraphic range. They evolved rapidly and became extinct suddenly. The mid-Cretaceous benthic associations, including a total of 106 species and 57 genera of benthic foraminifers and 48 species and 20 genera of dasycladalean algae, were analyzed to establish the principal diversity patterns at (sub)stage level of resolution. The Early Aptian marked the foraminiferal diversity maximum, whereas significant diversity drops are recorded in the Late Aptian and Early Cenomanian. The foraminiferal distribution within the oligotrophic habitats of the platform interior was controlled primarily by relative sea-level oscillations, variations in oceanic circulation rate, and nutrient availability in surface waters. There is a positive correlation between episodes of increased diversification and the regional relative sea-level rises, whereas regressive episodes resulted in reduction of oligotrophic habitats and decreased species richness. The dasycladaleans were the most diversified during the tidal-flat-dominated Barremian, and from that peak diversity decreased through the Early Aptian. A significant diversity drop occurred in the Late Aptian, and it was contemporaneous with the maximum abundance of Salpingoporella dinarica. The mid-Cretaceous dasycladaleans never fully recovered from the Early Aptian platform deepening event, and their post-Aptian diversity pattern implies dependence on factors other than relative sea level and associated changes in habitats.

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“…The Bajocian‐Bathonian succession of the Adriatic Platform contains a highly diversified benthic foraminifera association with several index species that form seven biozones (Velić, 2007): Timidonella sarda Taxon‐Range Zone (Late Aalenian‐Early Bajocian), Timidonella sarda‐Pseudodictyopsella jurassica Interval Zone (late Early Bajocian), Pseudodictyopsella jurassica and Marzoella ficcarellii Assemblage Zone (middle Bajocian), Pseudodictyopsella jurassica‐Paravalvulina complicata Interval Zone (middle Bajocian), Paravalvulina complicata Taxon‐Range Zone (latest Bajocian), Paleopfenderina salernitana Taxon‐Range Zone (Bathonian‐?earliest Callovian), and Satorina apuliensis Taxon‐Range Subzone (Late Bathonian). Among the calcareous algae, Selliporella donzellii flourished during the Late Bajocian and Early Bathonian (Prtoljan et al., 2015; Sokač & Grgasović, 2017; Velić & Sokač, 1978). Based on the above, the studied succession ranges from the base of the upper Bajocian (∼ Strenoceras niortense ammonite Zone) to the base of the Callovian ( Bullatimorphites bullatus ammonite Zone; Hesselbo et al., 2020, their Figure 26.10), with a duration of 3.2 Myr (Huang, 2018) to ∼4.5 Myr (cf., Hesselbo et al., 2020).…”

Section: Geologic Setting Facies and Methodsmentioning

confidence: 99%

Milankovitch Record From Middle Jurassic Platform Supports Moderate Coolhouse Glaciation

Husinec,

Read

2023

Paleoceanog and Paleoclimatol

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There are few documentations of far‐field effects of coolhouse glaciation and its signature preserved within Middle Jurassic carbonate platforms. Through outcrop logging and time series analysis we document the cyclostratigraphy of the upper Bajocian‐Bathonian interval of the Adriatic Platform, Croatia. The 200 m thick, ∼3.3 Myr duration cyclic platform record consists of peritidal carbonate parasequences (n = 109) with high‐energy grainstone‐rudstone bases fining up into micritic carbonate caps. There is little evidence of long‐term exposure near purported sequence boundaries, indicating the succession is conformable above the parasequence scale. Time series were constructed using Dunham rank and stratigraphic position, and parasequence thickness and stratigraphic position. A statistical estimation of accumulation rates using average spectral misfit (ASM) and correlation coefficient (COCO) methods that compare spectral peaks with an astronomical model at various sedimentation rates suggests that these rates ranged from 4.5 to 6 cm/kyr, which is compatible with long‐term rates based on thickness divided by duration. The time series analysis of rank series and cycle thickness series indicates long‐term obliquity modulation (∼1 Myr), short obliquity modulation (173 kyr), strong obliquity, and weak precession. The 173 kyr cycle is particularly evident in the cycle thickness series. The similarity of the spectra to the obliquity‐dominated Cenozoic coolhouse supports moderate southern hemisphere glaciation driving glacioeustatic sea level changes during the Middle Jurassic.

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Stratigraphy and depositionalenvironments of the lower cretaceous in the Karst region of the outer Dinarides (yugoslavia)

Cited by 8 publications

References 0 publications

Relative Sea-Level Changes Recorded on an Isolated Carbonate Platform: Tithonian to Cenomanian Succession, Southern Croatia

Relative Sea-Level Changes Recorded on an Isolated Carbonate Platform: Tithonian to Cenomanian Succession, Southern Croatia

Diversity Patterns in Mid-Cretaceous Benthic Foraminifers and Dasycladalean Algae of the Southern Part of the Mesozoic Adriatic Platform, Croatia

Milankovitch Record From Middle Jurassic Platform Supports Moderate Coolhouse Glaciation

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