Coquimbo Formation, Geological formation in Coquimbo Region, Chile.
The Coquimbo Formation is a geological deposit in the Coquimbo Region composed of alternating layers of sandstone, siltstone, and conglomerate reaching depths of 63 meters (207 feet) across ancient coastal terraces. The rock sequence reveals the structure and composition of materials that formed in marine environments over time.
Charles Darwin examined this formation in 1846 and documented marine fossils found there, establishing early geological research in the region. His observations contributed to the foundation for understanding South American coastal geology.
The formation serves as a fundamental research site for South American geologists studying the evolution of coastal landscapes and marine ecosystems.
Access to the formation typically requires permits for scientific study and field work. Visitors should expect challenging terrain and coastal weather conditions when exploring the site.
The formation preserves fossil remains of Thalassocnus carolomartini, an extinct marine mammal that adapted to gather food in deep water. This rare discovery reveals unexpected evolutionary paths among South American coastal creatures.
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