Cerro del Pueblo Formation, Geological formation in Coahuila, Mexico.
The Cerro del Pueblo Formation is a sequence of sedimentary layers roughly 160 meters thick, made of shale, sandstone, and limestone. These rocks were deposited when a vast sea covered this region.
The formation took shape roughly 73 million years ago during the late Cretaceous period, when a vast interior sea covered this landmass. This marine setting allowed sediments to accumulate and preserve countless fossils.
The formation draws researchers from multiple institutions studying the region's geological past. For visitors, it offers insight into scientific work and why such sites matter for understanding ancient environments.
The best way to explore this formation is through museum exhibits, particularly the Desert Museum in Saltillo, which displays an extensive collection of fossils and rock samples. Both the geological site and prepared specimens are available for viewing.
The formation is known for its rich collection of dinosaur fossils, particularly hadrosaurs and Coahuilaceratops, a horned dinosaur first formally identified here. These discoveries have shaped scientific understanding of Mexico's prehistoric animal life.
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