By: magic-gigapans
Image: Callan Bentley, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 1 May 2020
Last Updated: 18 May 2020

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A lively scene from shallow water sometime in the late Archean or Paleoproterozoic. This is Biwibik Iron Formation. It is a sample purchased from Ward's Scientific, which identifies it as hailing from Keweenawan, Michigan, USA. Biwibik itself is in Minnesota, though. The label identifies the stromatolite form (species??) as Collenia.