ABSTRACT
This discussion deals with faunas of the Cretaceous formations exposed in the plains of southern Alberta. Faunas older than the Milk River sandstone are not discussed. Local occurrences of fossils have made detailed paleontologic correlations in Alberta decidedly difficult. The marine, fresh-water, and brackish-water faunas are fairly constant and show little variation throughout Montana time, although some forms may be ascribed to definite horizons. This is particularly true of the Pakowki and Bearpaw shales, which are also definite lithologic units. The most plentiful and typical fossils are described and illustrated.
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