Has the time arrived when we can set up another horizon marker in the archaeology of western United States? An examination of the literature reveals that a projectile point which we will call the Stemmed, Indented Base Point may be so considered. This short note contains a compilation of but some of the references to this type of point in western United States and is written in hopes of stimulating comments and additional information. No attempt has been made to present an exhaustive distributional study of this artifact, but the accompanying chart lists some of its reported occurrences in order to point out its wide geographical spread as well as its estimated age and various terms by which it is known.