Evolution of shallow benthic communities during the Late Paleocene–earliest Eocene transition in the Northern Tethys (SW Slovenia)

Zamagni, Jessica; Mutti, Maria; Košir, Adrijan

doi:10.1007/s10347-007-0123-3

Cited by 78 publications

(66 citation statements)

References 47 publications

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“…3) North Adriatic platform (38°N) The Palaeogene succession of the North Adriatic platform reveals the existence of larger benthic foraminifera-dominated assemblages without corals during the Ypresian and Lutetian (Cosovic et al 2004;Zamagni et al 2008). The first coral records after the Palaeocene-Eocene Thermal Maximum point to the uppermost Lutetian (SBZ 16; Cosovic et al 2004).…”

Section: Circum-tethyan Carbonate Platform Evolution During the Palaementioning

confidence: 99%

Circum-Tethyan carbonate platform evolution during the Palaeogene: the Prebetic platform as a test for climatically controlled facies shifts

HÖNTZSCH¹,

SCHEIBNER²,

BROCK³

et al. 2013

Turkish J Earth Sci

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Section: Circum-tethyan Carbonate Platform Evolution During the Palaementioning

confidence: 99%

Circum-Tethyan carbonate platform evolution during the Palaeogene: the Prebetic platform as a test for climatically controlled facies shifts

HÖNTZSCH¹,

SCHEIBNER²,

BROCK³

et al. 2013

Turkish J Earth Sci

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“…The lowermost Eocene (SBZ5/6) is dominated by alveolinid-nummulitid limestones, whereas red algae and corals occur subordinately. Zamagni et al (2008) analyzed two sections east of Trieste paleoecologically and sedimentologically and described three facies types in SBZ4: 1 Orthophragminid-dominated facies with a poorly diverse foraminiferal assemblage and calcareous red algae. 2.…”

Section: West Carpathians (W-slovakia; 43°n Locality 4 Figs 4 5)mentioning

confidence: 99%

Late Paleocene–early Eocene Tethyan carbonate platform evolution — A response to long- and short-term paleoclimatic change

Scheibner

Speijer

2008

Earth-Science Reviews

172

163

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The early Paleogene experienced the most pronounced long-term warming trend of the Cenozoic, superimposed by transient warming events such as the Paleocene-Eocene Thermal Maximum (PETM). The consequences of climatic perturbations and associated changes on the evolution of carbonate platforms are relatively unexplored. Today, modern carbonate platforms, especially coral reefs are highly sensitive to environmental and climatic change, which raises the question how (sub)tropical reef systems of the early Paleogene reacted to gradual and sudden global warming, eutrophication of shelf areas, enhanced CO 2 levels in an ocean with low Mg/Ca ratios. The answer to this question may help to investigate the fate of modern coral reef systems in times of global warming and rising CO 2 levels. Here we present a synthesis of Tethyan carbonate platform evolution in the early Paleogene (~59-55 Ma) concentrating on coral reefs and larger foraminifera, two important organism groups during this time interval. We discuss and evaluate the importance of the intrinsic and extrinsic factors leading to the dissimilar evolution of both groups during the early Paleogene. Detailed analyses of two carbonate platform areas at low (Egypt) and middle (Spain) paleolatitudes and comparison with faunal patterns of coeval platforms retrieved from the literature led to the distinction of three evolutionary stages in the late Paleocene to early Eocene Tethys: Stage I, late Paleocene coralgal-dominated platforms at low to middle paleolatitudes; stage II, a transitional latest Paleocene platform stage with coralgal reefs dominating at middle paleolatitudes and larger foraminifera-dominated (Miscellanea, Ranikothalia, Assilina) platforms at low paleolatitudes; and stage III, early Eocene larger foraminifera-dominated (Alveolina, Orbitolites, Nummulites) platforms at low to middle paleolatitudes. The onset of the latter prominent larger foraminifera-dominated platform correlates with the Paleocene/Eocene Thermal Maximum. The causes for the change from coral-dominated platforms to larger foraminifera-dominated platforms are multilayered. The decline of coralgal reefs in low latitudes during platform stage II is related to overall warming, leading to sea-surface temperatures in the tropics beyond the maximum temperature range of corals. The overall low occurrence of coral reefs in the Paleogene might be related to the presence of a calcite sea. At the same time larger foraminifera started to flourish after their near extinction at the Cretaceous/ Paleogene boundary. The demise of coralgal reefs at all studied paleolatitudes in platform stage III can be founded on the effects of the PETM, resulting in short-term warming, eutrophic conditions on the shelves and acidification of the oceans, hampering the growth of aragonitic corals, while calcitic larger foraminifera flourished. In the absence of other successful carbonate-producing organisms, larger foraminifera were able to take over the role as the dominant carbonate platform inhabitant, leading to a stepw...

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“…The carbona tes of the Liburnia Formation are followed by Trstelj Beds in which bioclastic limestone with prevailing milio lids. They were deposited in very shallow near-shore environment of the innermost ramp with periodic emersions and shallows (zaMaGni et al, 2008) as indicated also by layers with Microcodium (jurkovŠek et al, 1996; koŠir, 2004). The Lower Thanetian age is based on benthic association of the SBZ 3 (Shallow Benthic Zones; serra-kiel et al, 1998).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Lower Thanetian age is based on benthic association of the SBZ 3 (Shallow Benthic Zones; serra-kiel et al, 1998). Major part of the Upper Trstelj Beds is characterized by bioclastic limestone with nume rous large foraminiferal genera, mainly Assilina, Lacazina and Pseudolacazina that inhabited mid ramp (zaMaGni et al, 2008). Based on foraminifer association this unit of the Trieste-Komen Plateau is defined as SBZ 4 of the Late Thanetian (oGorelec et al, 2001).…”

Section: Geological Settingmentioning

confidence: 99%

“…The lower boundary is marked by very frequent appearance of alveolinas, and the upper boundary is gradual or sharp. Alveolinid-nummulitid Limestone was deposited mainly in inner ramp setting that is in the Trie ste-Komen Plateau ranged into SBZ 5 to 8, thus in Illerdian (jurkovŠek et al, 1996;oGorelec et al, 2001;zaMaGni et al, 2008), however in Istria it may range up to the Lower Lutetian (DroBne, 1979). Thickness of Alveolinidnummulitid Limestone is variable and in the thickest parts it exceeds 300 m. During the Eocene the carbonate platform finaly drowned and was covered by advancing hemipelagic marls, marly limestones and redeposited carbonates (Transitional Beds) and deep water clastites (Flysch).…”

Section: Geological Settingmentioning

confidence: 99%

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Clypeina teakolarae sp. nov., a dasycladalean alga from Lower Eocene of Rakitovec (Čičarija, Slovenia)

Radoicic¹

2011

Geologija

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A new species, Clypeina teakolarae, is described from the Lower Eocene of ^i~arija, in Slovenia. The pattern of calcification, known so far only from the Upper Jurassic and the Lower Cretaceous, is structurally equal to that of the Clypeina jurassica group of species, having an intracellular, radial-fibrous calcite infilling and a micritic cell wall. Contrary to other species of the C. jurassica group, the main stem of the new taxon consists of spaced out twinwhorls bearing numerous, commonly irregularly arranged laterals. Izvle~ekIz spodnjeeocenskih plasti ^i~arije v Sloveniji je opisana nova vrsta dazikladaceje Clypeina teakolarae. Kalcifikacija vrste je strukturno enaka kot pri algah grupe Clypeina jurassica po tem, da ima intracelularno fibroznoradialno kalcifikacijo in kalcitno-mikritno celi~no steno. Od vrst te grupe se razlikuje po steljki (talusu), na kateri si v presledkih sledita po dve skupaj leže~i vretenci (dvoj~ka) s {tevilnimi, pretežno nepravilno postavljenimi vejicami.

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Evolution of shallow benthic communities during the Late Paleocene–earliest Eocene transition in the Northern Tethys (SW Slovenia)

Cited by 78 publications

References 47 publications

Circum-Tethyan carbonate platform evolution during the Palaeogene: the Prebetic platform as a test for climatically controlled facies shifts

Circum-Tethyan carbonate platform evolution during the Palaeogene: the Prebetic platform as a test for climatically controlled facies shifts

Late Paleocene–early Eocene Tethyan carbonate platform evolution — A response to long- and short-term paleoclimatic change

Clypeina teakolarae sp. nov., a dasycladalean alga from Lower Eocene of Rakitovec (Čičarija, Slovenia)

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