Microbialites as Markers of Biotic and Abiotic Events in the Karst District, Slovenia and Italy

Tunis, Giorgio; Pugliese, Nevio; Jurkovšek, Bogdan; Ogorelec, Bojan; Drobne, Katica; Riccamboni, Rodolfo; Tewari, V. C.

doi:10.1007/978-94-007-0397-1_11

Cited by 3 publications

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“…The last period of geological research of the Classical Karst Region began in the 1990s and after more than two decades of intensive geological research, a large number of detailed geological maps of the Slovenian (Jurkovšek, 2008(Jurkovšek, , 2010(Jurkovšek, , 2013Jurkovšek et al, 1996;Jurkovšek, Cvetko Tešović, & Kolar-Jurkovšek, 2013) and the Italian sides (Regione Autonoma Friuli Venezia Giulia, Servizio Geologico [RAFVG], 2008a[RAFVG], , 2008b were produced, together with a number of scientific and professional papers Korbar, 2009;Košir, 2003;Ogorelec, Dolenec, & Drobne, 2007;Ogorelec, Drobne, Jurkovšek, Dolenec, & Toman 2001;Ogorelec et al, 1996;Otoničar, 2007;Tunis et al, 2011;Palci, Jurkovšek, Kolar-Jurkovšek, & Caldwell, 2008 and references therein for Slovenia; Caffau, Pleničar, Pugliese, & Drobne, 1998;Caffau, Tsakiridou, Colizza, Melis, & Pugliese, 2001;Colizza, Cucchi, & Ulcigrai, 1989;Cucchi, Pirini Radrizzani, & Pugliese, 1989;Cucchi, Pugliese, & Ulcigrai, 1990;Pugliese et al, 1995;Tarlao, Tunis, & Venturini, 2005;Tewari et al, 2007 and references therein for Italy).…”

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confidence: 99%

Geology of the Classical Karst Region (SW Slovenia–NE Italy)

et al. 2016

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The paper aims to present the geology of the western part of the Classical Karst (NW Dinarides), located at the border between Slovenia and Italy. The work is based on archive, published and new data collected by Slovenian and Italian researchers within several scientific national and Cross Border Cooperation projects. The map, produced at a scale of 1:50,000, summarizes the lithological and structural setting and is supplemented by three geological cross-sections of the study area.ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Geology of the Classical Karst Region (SW Slovenia–NE Italy)

et al. 2016

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“…Neuweiler, 1993;Webb & Kamber, 2000;Neuweiler & Bernoulli, 2005;Floquet, Neuweiler & Léonide, 2012;Heindel et al, 2012;Duda et al, 2016), their role in bulding "mud mound"-like structures has been recognised since the nineties of the last century and up to date Dupraz & Strasser, 2002;Chan et al, 2014). They may reach important percentages (more than 50%) in ancient frameworks, particularly after extinction events; most notably in the Precambrian-Cambrian transition (Zhuravlev, 1996;Turner, Narbonne & James, 2000;Shapiro, 2004;Wahlman, Orchard & Buijs, 2013), the Permian-Triassic boundary (Delecat & Reitner, 2005;Ezaki, Liu, Nagano & Adachi, 2008;Kershaw, 2017); and the Cretaceous-Paleogene boundary (Zamagni, Kosir & Mutti, 2009;Tunis et al, 2011;Astibia, López-Martínez, Elorza & Vicens., 2012). They can also dwell successfully in deep and in cryptic environments, where the influence of light is minimum, or none at all (Keupp & Arp, 1990;Reitner, 1993;Reitner, Wilmsen & Neuweiler, 1995;Webb & Jell, 1997;Guido et al, 2017).…”

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Asociaciones fósiles dominadas por microbialita provenientes de los olistolitos Cipit de Alpe di Specie y Misurina en la Formación San Cassiano (Triásico Medio - Superior, Dolomitas, NE de Italia)

Sánchez‐Beristain

Reitner²

2019

TIP RECQB

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En este trabajo se describen cuatro nuevas asociaciones fósiles provenientes de la Formación San Cassiano (Ladiniense–Carniense, Dolomitas, NE de Italia), basándonos en treinta láminas delgadas elaboradas a partir de 10 calizas Cipit. Éstas son olistolitos que se desprendieron de las plataformas Cassianas hacia sedimentos contemporáneos de cuenca, siendo así relictos de ambientes “arrecifales”, o similares a arrecifes. Todas las muestras provienen de la Fossillagerstätte de San Cassiano. Las asociaciones fósiles fueron determinadas por medio de análisis de microfacies utilizando conteo de puntos y estimación visual y con ayuda de métodos estadísticos, tomando como base todas las fracciones con una importancia biológica (biomorfos y microbialitas). Se efectuaron análisis de clústeres en modo Q, acoplando tres algoritmos y dos índices. En todos los análisis, las principales fracciones son microbialitas (en promedio 75%) y macrofósiles (un promedio del 20%), en tanto que los cementos y aloquímicos, como alomicrita no representan una fracción importante en los análisis estadísticos.Las asociaciones obtenidas fueron nombradas como se enuncia a continuación: Asociación quetétido–microencostrante, Asociación microbialita–microencostrante, Asociación microbialítica dual y Asociación Microbialita–Terebella, respectivamente.Las características del paleoambiente del que provienen las asociaciones son discutidas por separado, tomando como base el contenido fósil y de microbialita. Los microencostrantes fueron de gran utilidad para la determinación de las condiciones de energía y luminosidad. Los resultados, considerando tanto la abundancia y diversidad de microencostrantes, en conjunto con la conspicuidad de microbialitas, indican que todas las asociaciones provienen de un ambiente profundo o de uno críptico.

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Reconstruction of tectonically disrupted carbonates through quantitative microfacies analyses: an example from the Middle Triassic of Southern Italy

Guido

Palladino

Sposato

et al. 2021

Facies

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The main goal of the paper is the reconstruction of a Middle Triassic buildup cropping out in the central part of the Southern Apennines. Middle Triassic reefs of the western Tethys realm are well known in the Northern and Southern Alps. In contrast, few studies of the Anisian–Ladinian carbonate platforms of the southern Apennines are available, due to the diagenetic alteration and tectonic disruption that hinder their paleoenvironmental and stratigraphic reconstruction. In an attempt to fill this gap, and to improve the knowledge on the Anisian–Ladinian carbonates of central Mediterranean area, this research is focused on a carbonate buildup cropping out in the “La Cerchiara” area, Sasso di Castalda (Basilicata, Southern Italy). The buildup, affected by intense tectonic deformation associated with the development of the Apennine thrust and fold belt, was studied using a statistical evaluation of the quantitative microfacies data. The research enabled a reconstruction of the original stratigraphic relationships of the various buildup fragments. A positive linear regression between the sample positions vs the percentage of autochthonous carbonates indicates an increase of the autochthons carbonate toward the top of the succession. The allochthonous fabrics (packstone/wackestone) at the base of the section (Unit IIIa) pass gradually upward into autochthonous (boundstones) facies (Units IIIb, I), consisting of microbialites (clotted peloidal micrite, microbial-derived laminae, and aphanitic micrite), microproblematica and cyanobacterial crusts, with few encrusting skeletal organisms. Statistical data suggest that units IIIa, IIIb, and I are in stratigraphic order while unit II appears to have been moved by tectonic dislocation from its original position at the base of the succession. The absence of metazoan reef framework, and the richness of micro-encrusters, autochthonous micrite and synsedimentary cements, suggest a mud-mound style of growth for the carbonate bodies of the Southern Apennine during the Anisian.

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Microbialites as Markers of Biotic and Abiotic Events in the Karst District, Slovenia and Italy

Cited by 3 publications

References 24 publications

Geology of the Classical Karst Region (SW Slovenia–NE Italy)

Geology of the Classical Karst Region (SW Slovenia–NE Italy)

Asociaciones fósiles dominadas por microbialita provenientes de los olistolitos Cipit de Alpe di Specie y Misurina en la Formación San Cassiano (Triásico Medio - Superior, Dolomitas, NE de Italia)

Reconstruction of tectonically disrupted carbonates through quantitative microfacies analyses: an example from the Middle Triassic of Southern Italy

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