Stromatolites of the Middle Proterozoic Belt Supergroup, Glacier National Park, Montana: a Summary and a Comment on the Relationship Between Their Morphology and Paleoenvironmentf argillite, sandstone, and sandy and muddy limestone and dolostone. Most of these strata were deposited in shallow subtidal, intertidal, and alluvial settings, with offshore deposits occurring only in portions of the Appekunny Argillite (for a summary of the sedimentary geology of the Belt Supergroup in Glacier National Park see Horodyski 1983). |