Caballos Formation, Geological formation in Upper Magdalena Valley, Colombia.
Caballos Formation is a geological sequence in the Upper Magdalena Valley region spanning multiple departments with alternating layers of sandstone, shale, limestone, and conglomerates. These sediment layers function as an important reservoir rock for hydrocarbons in the subsurface basins of this area.
This sequence formed during the Middle Cretaceous period and is assigned to the Aptian and Albian epochs. It was named in 1967 when geologist Corrigan designated it after Cerro Caballos in the region.
The formation holds scientific value for Colombian geologists, providing insights into the regional tectonic evolution and depositional environments of the Cretaceous period.
This rock lies beneath the surface and is mainly accessible through geological surveys and drilling. Visitors can learn about its significance through museums and research centers in the region.
These layers contain fossils of the nautiloid Heminautilus etheringtoni as well as remains of conifers and ferns from the Cretaceous. These plant findings reveal what the ancient environment of this region was like.
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