Michał Rakociński
University of Silesia in Katowice
DevonianAnoxic watersVolcanoWater columnSedimentary depositional environmentGeologyCarboniferousPaleontologyOil shaleTotal organic carbonPhanerozoicGeochemistryPaleoecologyLate Devonian extinctionEcologyPyriteConodontFramboidBottom waterCarbonateExtinction eventWeatheringOrganic matterReefMarine transgressionBenthic zonePhotic zone
41Publications
14H-index
718Citations
Publications 39
Newest
#1Michał Rakociński (University of Silesia in Katowice)H-Index: 14
#2Leszek Marynowski (University of Silesia in Katowice)H-Index: 31
Last. Paweł Filipiak (University of Silesia in Katowice)H-Index: 13
view all 4 authors...
Abstract A wide range of proxies (organic and inorganic geochemistry, gamma-ray spectrometry, microfacies, framboidal pyrite analysis) were applied in order to decipher changes in depositional conditions during the mid-Tournaisian anoxic event, referred to as the Lower Alum Shale Event (LASE) in the Polish part of the Laurussia basin. The LASE part of the section, unlike older Tournaisian deposits, is characterised by high concentrations of isorenieratane, palaeorenieratane, and their diagenetic...
Source
#1Michał Rakociński (University of Silesia in Katowice)H-Index: 14
#2Agnieszka Pisarzowska (University of Silesia in Katowice)H-Index: 10
view all 6 authors...
Recently, the end-Devonian mass extinction (Hangenberg Crisis, 359 Ma) was identified as a first-order mass extinction, albeit not one of the "Big Five" events. Many marine and terrestrial organisms were affected by this crisis. The cause of this mass extinction is still conjectural and widely discussed. Here we report anomalously high mercury (Hg) concentrations from the South Tian Shan (Uzbekistan), together with correlation using conodont biostratigraphic data. Hg enrichment (to 5825 ppb) was...
3 CitationsSource
#1Lawrence PercivalH-Index: 9
#3Leszek MarynowskiH-Index: 31
Last. Philippe ClaeysH-Index: 2
view all 7 authors...
Source
#1Agnieszka Pisarzowska (University of Silesia in Katowice)H-Index: 10
#2Michał Rakociński (University of Silesia in Katowice)H-Index: 14
Last. Manfred GerekeH-Index: 1
view all 11 authors...
Abstract A wide range of various proxies (e.g., mineralogy, organic carbon, inorganic geochemistry, C and Mo isotopes, and framboidal pyrite) were applied for interpretation of changing oceanic redox conditions, bioproductivity, and the regional history of volcanic activity. This resulted in internally consistent interpretation of the late Famennian Hangenberg Crisis in subtropical deepest water sites of the epeiric Rhenohercynian and Saxo–Thuringian basins, as well as more open sites of the Pal...
9 CitationsSource
#1Michał Rakociński (University of Silesia in Katowice)H-Index: 14
#2Leszek Marynowski (University of Silesia in Katowice)H-Index: 31
Last. Hans Peter Schönlaub (Austrian Academy of Sciences)H-Index: 11
view all 9 authors...
The end-Devonian global Hangenberg event (359 Ma) is among the most devastating mass extinction events in Earth’s history, albeit not one of the “Big Five”. This extinction is linked to worldwide anoxia caused by global climatic changes. These changes could have been driven by astronomical forcing and volcanic cataclysm, but ultimate causes of the extinction still remain unclear. Here we report anomalously high mercury (Hg) concentration in marine deposits encompassing the Hangenberg event from ...
49 CitationsSource
#1Lawrence Percival (UNIL: University of Lausanne)H-Index: 9
#2David P.G. Bond (University of Hull)H-Index: 32
Last. Karl B. Föllmi (UNIL: University of Lausanne)H-Index: 30
view all 8 authors...
Abstract The Late Devonian was marked by repeated faunal crises and episodes of geographically widespread marine anoxia, and featured one of the ‘Big Five’ mass extinctions of the Phanerozoic Aeon during the Frasnian–Famennian transition. However, the processes responsible for causing the numerous anoxic events remain unclear. This study highlights the occurrence of disturbances to the phosphorus cycle during several Late Devonian crises by investigating sedimentary concentrations of the element...
4 CitationsSource
#1Krzysztof Broda (University of Silesia in Katowice)H-Index: 5
#2Leszek Marynowski (University of Silesia in Katowice)H-Index: 31
Last. Michał Zatoń (University of Silesia in Katowice)H-Index: 24
view all 4 authors...
The lowermost Famennian deposits of the Kowala quarry (Holy Cross Mountains, Poland) are becoming famous for their rich fossil content such as their abundant phosphatized arthropod remains (mostly thylacocephalans). Here, for the first time, palaeontological and geochemical data were integrated to document abundance and diversity patterns in the context of palaeoenvironmental changes. During deposition, the generally oxic to suboxic conditions were interrupted at least twice by the onset of phot...
6 CitationsSource
#1Lawrence Percival (UNIL: University of Lausanne)H-Index: 9
#2David Selby (China University of Geosciences)H-Index: 50
Last. Karl B. Föllmi (UNIL: University of Lausanne)H-Index: 30
view all 9 authors...
Anomalously high rates of continental weathering have frequently been proposed as a key stimulus for the development of widespread marine anoxia during a number of Late Devonian environmental and biospheric crises, which included a major mass extinction during the Frasnian–Famennian transition (marked by the Upper and Lower Kellwasser horizons). Here, this model is investigated by presenting the first stratigraphic record of osmium-isotope trends (187Os/188Os) in upper Devonian strata from the K...
24 CitationsSource
#1Michał RakocińskiH-Index: 14
#2Michał ZatońH-Index: 24
Last. Jens LehmannH-Index: 58
view all 5 authors...
Source
#1Michał Rakociński (University of Silesia in Katowice)H-Index: 14
#2Michał Zatoń (University of Silesia in Katowice)H-Index: 24
Last. Jens Lehmann (University of Bremen)H-Index: 58
view all 5 authors...
Abstract In this paper, uppermost Jurassic and Lower Cretaceous black organic-rich siltstones (Rurikfjellet Formation) from Carolinedalen (Isfjorden, Spitsbergen) are studied using integrated palynological, petrographic, and geochemical methods (organic and inorganic geochemistry as well as Rock-Eval pyrolysis) in order to decipher the depositional conditions prevailing during their sedimentation, the type of organic matter from which they were formed, and their potential for generating hydrocar...
14 CitationsSource