Therefore,
🕰️ earth its own geological:
A study published in the journal Communications Earth & Environment reveals the existence of a cycle of 60 million years combining tectonics. In addition, biogeochemistry and marine biodiversity.
Based on the analysis of cyclicities in geological archives. Furthermore, Descharters – including two of theEarth Sciences Institute of Paris (CNRS / Sorbonne University) – put in light A geological clock internal which seems to punctuate the great biological upheavals of the phanerozoic.
Geologists. For example, paleontologists have long defined the geological time scale mainly on the basis of the great upheavals of life on earth. Meanwhile, THE era, periods et eras, In particular their limits, were thus defined according to the major paleobiological transformations. L’floorbasic unit of this scale, is mainly based on the fossiliferous content of rocks.
For the vast majority of the stages of the phanerozoic. fundamental time 🕰️ earth its own geological markers correspond to biostratigraphic events (first and last appearances of fossil groups), reflecting possible global paleoenvironmental variations that affected biodiversity and renewal of life on earth.
A cycle of 60 million years between tectonics. geochemistry and biodiversity
The authors identify a cyclicity of 60 million years (MA) over the duration of the geological stages, which coincides perfectly with similar fluctuations in marine biodiversity, biogeochemical cycles and major developments in global movements of tectonic plates with phanerozoic. This common synchronization suggests a profound link between the evolution of marine life. the internal activity of the planet via the processes of surface such as continental alteration or the redox conditions of oceans.
Diagrams illustrating the possible motor mechanisms of the biodiversity cycle of 60 million. years during the phanerozoic.
The earth, the engine of its 🕰️ earth its own geological own organic crises?
The results suggest that these tectonic processes modulate the ocean biogeochemistry directly influencing shallow marine habitats – the. richest in biodiversity. Variations in oxidic-reduction conditions could explain the major extinction events observed in the fossil archives.
Thus. this coupling between internal and surface processes reveals that the earth could well describe its own geological clock, controlling the major transformations of marine life (paleoenvironmental and paleobiological) during geological times.
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