Grzegorz Racki
University of Silesia in Katowice
DevonianStructural basinSequence (geology)FaunaSedimentary depositional environmentGeologyPaleozoicFaciesPaleontologyPaleoecologyLate Devonian extinctionEcologyEarth scienceCarbonate platformConodontCarbonateExtinction eventExtinctionBiostratigraphySedimentary rockCarbon cycleBiogeochemical cycleReefBiology
Publications 158
#1Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
Abstract Flood basalts (traps) and large igneous provinces (LIPs) are essential topics in modern geology. However, little is known about the stages of recognition of particular LIPs, including a giant continental LIP in Siberia. Even though basalt occurrences were reported from the region from the end of the 18th century (e.g., by Kozitsky, Middendorf, Schmidt and Lopatin), the first ample data were provided by the Polish geologist Aleksander Czekanowski (1833–1876). He was educated at the Unive...
#1Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
#2Christian Koeberl (University of Vienna)H-Index: 71
Last. Michał Michalak (University of Silesia in Katowice)H-Index: 1
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The mid-nineteenth century is not regarded as the time when the theory of extraterrestrial catastrophism developed. However, two German scholars independently introduced original concepts of terrestrial impacts of large celestial bodies at that time. Ludwig Pfeil (1803–1896), a self-educated wealthy landowner, and Karl Reichenbach (1788–1869), an eminent scientist and industrialist, independently proposed in the 1850s that the Earth is an aggregate of meteoritic masses and has experienced many i...
#1Agnieszka Pisarzowska (University of Silesia in Katowice)H-Index: 10
#2R. Thomas Becker (WWU: University of Münster)H-Index: 12
Last. Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
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Abstract A positive carbon stable isotope excursion of about 3‰ is documented in the topmost lower Frasnian at Padberg, eastern Rhenish Massif, as a muted record of the worldwide early−middle Frasnian isotopic perturbation (punctata Event; up to 6–8‰ shift in both δ13Ccarb and δ13Corg elsewhere), comparable with the Appalachian δ13C curve. This German isotopic signature occurs in a 12 m thick calciturbidite succession and correlates well with the three-step chemostratigraphic pattern known from ...
3 CitationsSource
#1Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
Abstract Although the prime causation of the Late Devonian Frasnian–Famennian (F–F) mass extinction remains conjectural, such destructive factors as the spread of anoxia and rapid upheavals in the runaway greenhouse climate are generally accepted in the Earth-bound multicausal scenario. In terms of prime triggers of these global changes, volcanism paroxysm coupled with the Eovariscan tectonism has been suspected for many years. However, the recent discovery of multiple anomalous mercury enrichme...
20 CitationsSource
#1Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
#2Paul B. Wignall (University of Leeds)H-Index: 74
1 CitationsSource
#1Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
#2Spencer G. Lucas (AMNH: American Museum of Natural History)H-Index: 36
ABSTRACTDicynodont therapsids are prominent elements of Triassic continental faunas, but the date of their demise is controversial, linked either to end-Carnian faunal turnover or to end-Triassic m...
6 CitationsSource
#1Grzegorz RackiH-Index: 1
#1Grzegorz RackiH-Index: 32
8 CitationsSource
#2Grzegorz RackiH-Index: 32
Abstract Changes in the climate-sensitive carbon cycle during the major and second-order Late Devonian global events were more complex than usually expected, i.e., they were not characterized only by positive δ13Ccarb and δ13Corg excursions up to 5.5‰. In fact, the carbon (and oxygen) isotope signatures in lime mudstones are less susceptible to diagenetic bias and therefore several negative trends and spikes in different facies of distant continents are re-interpreted as primary biogeochemical s...
1 CitationsSource
#1Grzegorz Racki (University of Silesia in Katowice)H-Index: 32
#2Christian Koeberl (University of Vienna)H-Index: 71
1 CitationsSource
#1Grzegorz Racki (Silesian University)H-Index: 32
#2Peter Königshof (AMNH: American Museum of Natural History)H-Index: 15
Last. Agnieszka Pisarzowska (Silesian University)H-Index: 10
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Abstract Two studied sections of the Frasnian-Famennian (F-F) boundary beds in western Thailand differ significantly in their depositional and geochemical characteristics. The highly condensed, monotonous Mae Sariang (MS) limestone succession generally corresponds to the event-chemostratigraphic pattern of the F-F biocrisis based primarily on German sections, and brief anoxic episodes are identifiable in trace-metal signatures (but neither organic-rich intercalations nor distinct volcanic signal...
7 CitationsSource