Snakeskin Agate nodule 17 g


  • Weight: 17 g
  • Size: 38 mm
  • Origin: Rome, Oregon, USA

Availability: In stock

SKU: PAJ0018 Categories: ,
Snakeskin Agate nodule from Rome, eastern Oregon.
These small siliceous concretions are interpreted to be of microbial origin as discussed in the book “Biominerals“, page 321 (Campos-Venuti, 2022). The internal structure is pure translucent chalcedony without any clue on they origin, but the skin with pinnacles and furrows is undoubtely a bioconstruction, very similar to many stromatolites. So this is a real fossil microbialite. Colloidal silica precipitate inside the biofilm in the form of a small lump. Then the lumps agglomerate together slowly forming the nodule.
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