Abstract
Guide fossils and form genera, which the geologist can roughly and quickly identify in the field with minimum chances for error, are briefly described and illustrated by hand sketches. Fossils that are relatively common and stratigraphically significant in the Paleozoic, Mesozoic, and Cenozoic rocks of western and northern Canada and Alaska are emphasized. The main groups treated are fusilinids, stromatoporoids, graptolites, corals, brachiopods, pelecypods, cephalopods, and trilobites. The probable ranges and anticipated abundance of important forms in these and other groups are charted.
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