The Silurian nautiloid-bearing strata of the Cellon Section (Carnic Alps, Austria): Color variation related to events

Histon, Kathleen

doi:10.1016/j.palaeo.2012.10.012

Cited by 8 publications

(12 citation statements)

References 37 publications

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“…It is located in the Central Carnic Alps that stretches across the Italian/Austrian border for more than 140 km (Brett et al. ; Histon ; Corradini et al. ) continuing to the east into the Western Karawanke Mountains in northern Slovenia.…”

Section: Geological Settingmentioning

confidence: 99%

“…The depositional environment during Llandovery and Wenlock was moderately shallow with episodic deepening (condensed sequences) forming the lower parts of the Kok Formation and deepening toward the upper part (middle Ludlow), transitioning into the Cardiola Formation, representing a deeper offshore setting with periods of nondeposition. A more stable pelagic setting is developed in the Alticola and Megaerella formations (Upper Ludlow and Lower Prídolí) (Histon and Schönlaub ; Schönlaub and Histon ; Histon ). Overall, the succession represents a transgressive regime from Llandovery to Ludlow, where Ludlow‐aged strata mostly consist of condensed pelagic limestone deposited at a slow sedimentation rate with periods of highstands represented by dark organic‐rich shale layers (Brett et al.…”

Section: Geological Settingmentioning

confidence: 99%

“…). Cephalopod‐rich nodular to massive carbonates overlay these highstand intervals, which indicate condensed offshore facies (Histon ).…”

Section: Geological Settingmentioning

confidence: 99%

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From the mid‐Ordovician into the Late Silurian: Changes in the micrometeorite flux after the L chondrite parent breakup

Martin

Schmitz

Schönlaub

2018

Meteorit & Planetary Scien

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We present the first reconstruction of the micrometeorite flux to Earth in the Silurian Period. We searched 321 kg of condensed, marine limestone from the Late Silurian Cellon section, southern Austria, for refractory chrome‐spinel grains from micrometeorites that fell on the ancient sea floor. A total of 155 extraterrestrial spinel grains (10 grains >63 μm, and 145 in the 32–63 μm fraction) were recovered. For comparison, we searched 102 kg of similar limestone from the mid‐Ordovician Komstad Formation in southern Sweden. This limestone formed within ~1 Ma after the breakup of the L chondrite parent body (LCPB) in the asteroid belt. In the sample we found 444 extraterrestrial spinel grains in the >63 μm fraction, and estimate a content of at least 7000 such grains in the 32–63 μm fraction. Our results show that in the late Silurian, ~40 Ma after the LCPB, the flux of ordinary equilibrated chondrites has decreased by two orders of magnitude, almost down to background levels. Among the ordinary chondrites, the dominance of L‐chondritic micrometeorites has waned off significantly, from >99% in the post‐LCPB mid‐Ordovician to ~60% in the Late Silurian, with ~30% H‐, and ~10% LL‐chondritic grains. In the Late Silurian, primitive achondrite abundances are similar to today's value, contrasting to the much higher abundances observed in pre‐LCPB mid‐Ordovician sediments.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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From the mid‐Ordovician into the Late Silurian: Changes in the micrometeorite flux after the L chondrite parent breakup

Martin

Schmitz

Schönlaub

2018

Meteorit & Planetary Scien

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“…The Cardiola Formation spans beds 20-24, has a thickness of 3.39 m, and includes the uppermost part of the A. ploeckensis and the P. siluricus conodont zones (Corradini et al, 2015(Corradini et al, , 2022. In the Cellon section, the upper part of the P. siluricus zone is absent, indicating a hiatus between the Cardiola and Alticola Formations Wenzel (1997), Jeppsson and Aldridge (2000), Brett et al (2009) and Histon (2012aHiston ( , 2012b, Conodont zonation (Corradini et al, 2015(Corradini et al, , 2022, bed numbers of (Walliser, 1964) and lithology [(digitised of (Walliser, 1964)]. The dashed red line in (D) is a hiatus identified through biostratigraphy (see text in the geological setting).…”

Section: Geological Settingmentioning

confidence: 99%

“…Frontiers in Earth Science 03 frontiersin.org 10.3389/feart.2024.1357751 (Corradini et al, 2015(Corradini et al, , 2022. The boundary of the Kok and Cardiola Formations (25.08 m) aligns with the Linde Event (Jeppsson and Aldridge, 2000;Histon, 2012aHiston, , 2012b. The Linde Event is poorly constrained, so only a midpoint at 25.08 m is assigned to it.…”

Section: Geological Settingmentioning

confidence: 99%

Age and orbital forcing in the upper Silurian Cellon section (Carnic Alps, Austria) uncovered using the WaverideR R package

Arts,

Corradini,

Pondrelli

et al. 2024

Front. Earth Sci.

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The type-Silurian Cellon section in the Carnic Alps in Austria underpins much of the current Silurian conodont zonations, forming the basis for the Silurian timescale. However, the Silurian record of the Cellon section lacks radiometric and astrochronological age constraints, making it difficult to gain insights into the processes pacing Silurian (anoxic) events. To attain age constraints and investigate the pacing Silurian (anoxic) events by astronomical cycles, a cyclostratigraphic study was conducted on high-resolution pXRF (CaO, Al2O3, and Fe2O3) and induration records spanning the Ludlow and Pridoli parts of the Cellon section. Astronomical cycles ranging from precession to the 405-kyr eccentricity cycle were first recognised visually in the field and in proxy records. The visual detection of astronomical cycles served as an input for the WaverideR R package, enabling the tracking of the 405-kyr eccentricity period in each proxy’s continous wavelet transform scalograms. These tracked period curves were combined with external age controls through multiple Monte Carlo simulations, generating an (absolute) age model. This age model is used to assign ages and durations and their respective uncertainties to a hiatus in the Ludfordian, conodont zones, lithological units, geochronological units and events, yielding new ages for Silurian stage boundaries (e.g., Gorstian-Ludfordian boundary at 425.92 ± 0.65 Ma, the Ludfordian-Pridoli boundary at 423.03 ± 0.53 Ma, the Silurian-Devonian boundary at 418.86 ± 1.02 Ma), and new durations for the Ludfordian at 2.89 ± 0.35 Myr and Pridoli at 4.24 ± 0.46 Myr. Furthermore, the imprint of astronomical cycles in the Cellon section itself indicates that the Linde, Klev and Silurian-Devonian boundary events all occur after a 2.4-Myr eccentricity node, indicating pacing by astronomical forcing, similar to other Devonian and Cretaceous anoxic events. The Lau event, however, does not appear to coincide with a 2.4-Myr eccentricity node.

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Birth and evolution of the Paleocarnic Chain in the Southern Alps: a review

Mariotto

Venturini

2019

Int J Earth Sci (Geol Rundsch)

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The present work is aimed at reviewing the state of the art of the studies centered on the pre-collisional and collisional, Variscan evolution of the eastern Southern Alps. The main focus is on the Carnic Alps, a geologically spectacular and extremely complex area, which has been a major subject of study for structural geologists, stratigraphers, and paleontologists for more than a century. After decades of field studies aimed at unveiling the birth and evolution of this belt, the tectonic and geodynamic interpretations proposed for almost a century by two different groups of authors remain substantially different. German-speaking authors, over the decades, have consistently proposed a scenario marked by a mature, Devonian passive margin, which later on evolved into an active Mississippian continental margin; the following collisional phase resulted in an accretionary wedge that, in its evolution, might be compared to those generated by Variscan events outside the Alpine domain. On the contrary, Italian authors have mainly put forward a pre-collisional setting dominated by wrench-fault tectonics, followed by the formation of a large, collisional thrust-and-fold belt, arc-shaped in plan view. We illustrate the results accomplished so far and discuss the interpretations formulated by the two different research schools; our review provides a chance to compare the different interpretations and, at the same time, prompts the need for new and targeted data collection in the area.

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The Silurian nautiloid-bearing strata of the Cellon Section (Carnic Alps, Austria): Color variation related to events

Cited by 8 publications

References 37 publications

From the mid‐Ordovician into the Late Silurian: Changes in the micrometeorite flux after the L chondrite parent breakup

From the mid‐Ordovician into the Late Silurian: Changes in the micrometeorite flux after the L chondrite parent breakup

Age and orbital forcing in the upper Silurian Cellon section (Carnic Alps, Austria) uncovered using the WaverideR R package

Birth and evolution of the Paleocarnic Chain in the Southern Alps: a review

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