The Fremont projectile point typology was developed in the 1980s. An early revision combined the Rose Spring Corner-notched and Eastgate Expanding-stem types into a combined Rosegate type with an end date of 900-1000 AD. Some archaeologists recognize that these projectile points persist to approximately 1300 AD but others use the earlier dates. Furthermore, there is a varied approach to these types. Some use the original two types, while others use Rosegate or a combination of Rosegate, Rose Spring, and Eastgate. We used projectile point typology data, illustrations, and photographs to study the temporal range and morphological variation of Rosegate points. We found that Rosegate points are common throughout the Fremont period, with some decline over time. A spatial analysis demonstrates that the points are found throughout the Fremont region but are not evenly distributed. Our morphological analysis does not support the separation of Rosegate points into two distinct types.
The spatial analysis of biological interactions: morphological variation responding to the co‐occurrence of competitors and resources
