New occurrences of jurassic rocks and fossils in central and northern Yukon Territory

Abstract
This report presents new information on the stratigraphy of marine Jurassic rocks in parts of central and northern Yukon. The presence of these rocks indicates that the Jurassic sea that invaded northern Yukon and northern Alaska extended at least temporarily into the Keele Range and Charley River area, and covered regions that hitherto had been considered to be land during Jurassic times. A southward temporary extension of this Arctic transgression to the sea in southern Alaska is considered possible. The report contains systematic descriptions of many of the more important guide fossils and a discussion of age and correlation based on the ammonite faunas.

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