2017
DOI: 10.4236/ijg.2017.89067
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Growth, Duplication and Lateral Mutual Compressive Deformation of Akouemma hemisphaeria on the Seafloor of Okondja Basin at 2.2 Ga (Gabon)

Abstract: A colony of macro-fossils Akouemma hemisphaeria has been described in the Paleoproterozoic sedimentary basin of Okondja, Gabon. These fossils are classified into two groups according to their spheroidal or elongated forms. The spheroidal shapes are similar, have a tripartite structure with two hemispheres and a median disc and gradually pass to the elongated forms. These elongated forms have a pronounced bipartite tendency to two "hemispheres" separated by a median surface, and often have several ovoid "pieces… Show more

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Cited by 7 publications
(1 citation statement)
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“…The Palaeoproterozoic witnessed significant changes in the Earth's surface environment, including the snowball Earth events (Kopp, Kirschvink, Hilburn, & Nash, ), the great oxygenation of the ocean/atmosphere (Bekker et al, ; Rye & Holland, ) and the emergence of eukaryotes (Albani et al, ; Han & Runnegar, ; Edou‐Minko et al, ). Long‐lasting positive carbon isotope excursion (δ 13 C VPDB >5‰) called the Lomagundi–Jatuli Event (LJE) is another significant phenomenon that is recorded in shallow marine carbonates deposited worldwide (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…The Palaeoproterozoic witnessed significant changes in the Earth's surface environment, including the snowball Earth events (Kopp, Kirschvink, Hilburn, & Nash, ), the great oxygenation of the ocean/atmosphere (Bekker et al, ; Rye & Holland, ) and the emergence of eukaryotes (Albani et al, ; Han & Runnegar, ; Edou‐Minko et al, ). Long‐lasting positive carbon isotope excursion (δ 13 C VPDB >5‰) called the Lomagundi–Jatuli Event (LJE) is another significant phenomenon that is recorded in shallow marine carbonates deposited worldwide (e.g.…”
Section: Introductionmentioning
confidence: 99%