Algae and Algal Beds in the Belt Series of Glacier National Park

Abstract

Rocks of the Belt series in Glacier National Park present evidence of repeated sedimentary cycles closely associated with changes in level, sedimentation apparently being marine. Conforming to stages in these cycles several new formations are described and others are redefined. At several horizons beds of fossil algae occur, containing both new and previously described species of Collenia, and species of Newlandia, Weedia, and Beltina. Algal life-forms are closely correlated with sedimentary types, remaining uniform over wide areas.