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Grypania Spiralis (GRY8)
$950.00
Notes specific to this specimen: Nice slab showing several clear segments of Grypania, a couple with the classic full circles and others with curving arc formed by this species. A couple of the segments – like the circle in the lower middle – show examples of what’s been described as “desiccation” of the outer sheath along its length. This results in impingement of the sheath between individual cells, giving it a “bumpy” appearance. The desiccated segments are very rare.
SIZE: 1.5″ x 2″
NAME: Grypania spiralis
AGE: Paleoproterozoic Era / 2.1 billion years
UNIT: Negaunee Iron Formation
SITE: Empire Mine, Palmer, Michigan
Notes specific to this specimen: Nice slab showing several clear segments of Grypania, a couple with the classic full circles and others with curving arc formed by this species. A couple of the segments – like the circle in the lower middle – show examples of what’s been described as “desiccation” of the outer sheath along its length. This results in impingement of the sheath between individual cells, giving it a “bumpy” appearance. The desiccated segments are very rare.
SIZE: 1.5″ x 2″
NAME: Grypania spiralis
AGE: Paleoproterozoic Era / 2.1 billion years
UNIT: Negaunee Iron Formation
SITE: Empire Mine, Palmer, Michigan
Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.
Additional information
| Name / Species | Grypania spiralis |
|---|---|
| Age | Paleoproterozoic Era / 2.1 billion years |
| Unit | Negaunee Iron Formation |
| Site | Empire Mine, Palmer, Michigan |
