Stromatolites of the Middle Proterozoic Belt Supergroup, Glacier National Park, Montana: a summary and a comment on the relationship between their morphology and paleoenvironment.

Abstract

Stromatolites are common in the Middle Proterozoic Belt Supergroup in Glacier National Park, Montana, occurring in 5 of the 6 formations that are exposed in the central part of the park. They include mound-shaped stromatolites, branched columnar stromatolites referable to the group Baicalia, and conically laminated stromatolites referable to the group Conophyton. Because these stromatolites have diverse morphologies, are associated with different lithologies, and occur in strata deposited in a variety of settings, they provide a good opportunity to evaluate the relationship between stromatolite morphology and paleoenvironmental conditions. -Author