Precambrian
ABSOLUTELY RARE!Kimberella was an extinct genus of animals from the Ediacaran fauna that lived during the Ediacaran Period, approximately 558 to 555 million years ago. To date, only the species K. quadrata is known. The first fossils were discovered in 1959 in the Ediacara Hills; better-preserved specimens were unearthed in 1997 near the White Sea and were dated to 558–555 million years ago.Initially, Kimberella was classified as a jellyfish. Later finds exhibiting bilateral symmetry and possible traces of a radula led to the hypothesis that it might have been an early representative of the mollusks. However, this classification is controversial. The only certainty is that Kimberella belonged to the Bilateria (bilaterally symmetrical animals).Period: Precambrian;Location: Solza River, Arkhangelsk, RussiaSize: 13 x 8 x 1.5 cm The Ediacara Hills give their name to the Ediacaran, a geological period of the late Precambrian that spanned approximately 635 to 542 million years ago. They contain one of the oldest known fossil deposits of multicellular organisms with preserved soft tissues.The colours in the pictures may differ from those of the original.
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ABSOLUTELY RARE!Palaeophragmodictya is an extinct genus of sponge-grade organisms from the Ediacaran Period. Originally interpreted as a hexactinellid sponge, the organism also bears some coelomate characteristics, including bilateral symmetry. The organisms take the form of a rounded, dome-like bag, 7–68 mm in diameter, with an uneven margin. Radial grooves define sac-like compartments within the bag. The radial pattern has an element of bilateral symmetry. A stalk emerges from the central point of some specimens, at the top of the organism; in life, it probably extended into the water column. Ray-like filaments radiate outwards from the edge of the bag.Some structures in the organism have been interpreted as spicules.Period: Proterozoic, Vendian, Ediacarian; Belomorian Stage, Yorga Formation, Kimberella Layers Location: Solza River, Arkhangelsk, RussiaSize: 7 x 5,5 x 2 cm The Ediacara Hills give their name to the Ediacaran, a geological period of the late Precambrian that spanned approximately 635 to 542 million years ago. They contain one of the oldest known fossil deposits of multicellular organisms with preserved soft tissues.The colours in the pictures may differ from those of the original.
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It is debatable whether these are cnidarians, algae or stromatolites. The chemical signature of the clearly recognizable bumps indicates that this is the work of cyanobacteria. They are assigned to the Ediacara fauna of Eastern Europe.Age: Proterozoic, Tschernji-Kamen-Formation;Locality: Bernashivka, Vinnytsia Oblast, UkraineSize: approx. 24 x 16 x 2 cmThe pictures are examples. You will receive a piece of comparable quality.Colors on photos may differ slightly from those of the original specimen for technical reasons.
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It is debatable whether these are cnidarians, algae or stromatolites. The chemical signature of the clearly recognizable bumps indicates that this is the work of cyanobacteria. They are assigned to the Ediacara fauna of Eastern Europe.Age: Proterozoic, Tschernji-Kamen-Formation;Locality: Bernashivka, Vinnytsia Oblast, UkraineSize: approx. 6 x 8-10 cmThe pictures are examples. You will receive a piece of comparable quality.Colors on photos may differ slightly from those of the original specimen for technical reasons.
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Historical slide with shell carapaces of female Cyprionotus ostracods.Age: Recent; Locality: Baleal, Ferrel, district of Peniche, PortugalDue to technical reasons, colors on photos may differ slightly from those of the original specimen. Our images are for reference only. When you make a purchase, you will receive a copy of equivalent quality.
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A slab that has been very well polished on both sides,the characteristic texture is clearly visible!You will receive a copy with a precise label; the photographs show various versions.Period: Precambrian, BIF Formation;Location: Pilbara, Western Australia, AustraliaSize: approx. 9 cm x 4 cm x 0.5 cmBanded iron formations (BIFs; also known as banded ironstone formations) are distinctive sedimentary rock units consisting of alternating layers of iron oxides and low-iron chert. They can reach a thickness of up to several hundred meters and extend laterally over several hundred kilometers. Almost all of these formations date from the Precambrian era and, according to one theory, are believed to document the oxygenation of Earth’s oceans. Some of Earth’s oldest rock formations, which formed about 3,700 million years (Ma) ago, are associated with banded iron formations.It is believed that banded iron formations formed in seawater as a result of oxygen production by photosynthetic cyanobacteria. The oxygen combined with dissolved iron in the Earth’s oceans to form insoluble iron oxides, which precipitated and formed a thin layer on the seafloor. Each band resembles a varve and is the result of cyclical fluctuations in oxygen production.Colors on product photos may differ from those of the original specimen due to technical reasons. Our pictures are for reference only. You will receive a specimen of equivalent quality with your purchase.
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A slab that has been very well polished on both sides,the characteristic texture is clearly visible!Period: Precambrian, BIF Formation;Location: Pilbara, Western Australia, AustraliaDimensions: approx. 12.5 cm x 9.5 cm x 0.5 cmBanded iron formations (BIFs; also known as banded ironstone formations) are distinctive sedimentary rock units consisting of alternating layers of iron oxides and low-iron chert. They can reach a thickness of up to several hundred meters and extend laterally over several hundred kilometers. Almost all of these formations date from the Precambrian era and, according to one theory, are believed to document the oxygenation of Earth’s oceans. Some of Earth’s oldest rock formations, which formed about 3,700 million years (Ma) ago, are associated with banded iron formations.It is believed that banded iron formations formed in seawater as a result of oxygen production by photosynthetic cyanobacteria. The oxygen combined with dissolved iron in the Earth’s oceans to form insoluble iron oxides, which precipitated and formed a thin layer on the seafloor. Each band resembles a varve and is the result of cyclical fluctuations in oxygen production.
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