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- Septerian Nodule
Septerian Nodule
SKU:
Sep2-B17
$42.00
$42.00
Unavailable
per item
Septarian's formed between 50 to 70 million years ago. As a result of
volcanic eruptions, dead sea life was chemically attracted to the
sediment around them, forming mud balls. As the ocean receded, the balls
dried and cracked. Due to their bentonite content they also shrank in
size, creating the cracks inside. As decomposed shells seeped down into
the cracks in the mud balls, calcite crystals formed. The outer thin
walls of calcite then transformed into aragonite. The name Septarian
comes from the Latin word "septem", meaning seven, because the mud balls
had a tendency to crack in 7 points in every direction, thereby
creating the distinctive pattern these nodules exhibit. Septarians are
composed of Calcite (The Yellow Centers), Aragonite (The Brown Lines),
and the outer grey rock is Limestone. Under UV light the Argonite glows
brilliant green, making it an incredible conversation piece.
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