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Name:
Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarians were formed during the Cretaceous period, 50 to 70 million years ago. Decomposing sea life killed by volcanic eruptions, had a chemical attraction for the sediment around them, forming mud balls. As the ocean receded, the balls were left to dry and crack. Because of their bentonite content they also shrank at the same time trapping the cracks inside. As decomposed calcite from the shells was carried down into the cracks in the mud balls, calcite crystals formed. A thin wall of calcite was transformed into aragonite separating the bentonite heavy clay exteriors from the calcite centers. Because of this, the nodules are called septarians.
The name Septarian is derived from the Latin name, Septem, meaning seven. This relates to the fact that the mud balls cracked with 7 points in every direction, thereby creating the beautiful design.
Septarians are composed of Calcite (The Yellow Centers), Aragonite (The Brown Lines) and the Outer Grey Rock is Limestone. Occasionally the fossil or some of the fossils which started the formation of the rock is noticeable in the rock.
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 1 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 2 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 3 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 4 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 5 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 6 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 7 $7.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 8 $11.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 9 $11.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 10 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 11 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 12 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 13 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 14 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 15 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 16 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 17 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 18 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 19 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 20 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 21 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 22 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 23 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 24 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 25 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 26 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 27 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 28 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 29 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 30 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 31 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 32 $15.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 33 $18.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 34 $18.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 35 $18.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 36 $18.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 37 $18.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 38 $18.00
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Name: Septarian Sphere
Geologic Age: Cretaceous
Location: Madagascar
Septarian Sphere 39 $18.00
