National Natural Landmarks

West Bijou Site

West Bijou Site
West Bijou Site

West Bijou Site contains some of the most scientifically important evidence associated with the Cretaceous-Paleogene (K-Pg) boundary [formerly known as the Cretaceous-Tertiary (K-T) boundary]. The K-Pg boundary at the West Bijou Site is unique due to its palynological extinction level, fern-spore spike, iridium anomaly and shocked quartz, Cretaceous and Paleogene (Tertiary) vertebrate fossils, magnetostratigraphy, and radiometric dating. Bisecting the site, West Bijou Creek, maintains a natural hydrologic pattern, flowing through a mosaic of upland and riparian shortgrass prairie plant communities, supporting a diversity of common and rare plant and wildlife species. West Bijou Site provides an excellent example of a valuable geologic resource located within a natural shortgrass prairie ecosystem.

Location: Arapahoe County, CO ; Arapahoe County, CO ; Elbert County, CO ; Elbert County, CO

Year designated: 2016

Acres: 7,613

Ownership: Private

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Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.


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