Stromatolites represent some of the oldest life-forms on the planet. Here in the outcrop you will find two froms - Baicalia and Conophyton which are about 1.4 billion years old. The site also contains something called molar-tooth structure - a feature of Proterozoic sediments which probably formed from carbon dioxide bubbling up through unconsolidated sediments. Stop 6 of Sears et al.
References
Page 240 - Sears, J. W. et al., 2016, Transect across the northeastern margin of the Mesoproterozoic Belt Basin and Lewis thrust, Glacier National Park, Montana: Geol. Soc. Am. Field Gude 44, p. 231 - 245.
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