Las Juntas Formation, Geological formation in Eastern Cordillera, Colombia.
Las Juntas Formation is a sequence of sedimentary rock layers in Colombia's Eastern Cordillera spanning approximately 1,090 meters thick. The layers contain shale, limestone, and claystone stacked one above the other.
This rock sequence formed during the Late Cretaceous period roughly 70 to 60 million years ago through marine deposition processes. It documents a time when seawater covered this part of the Andes.
Scientists from multiple Colombian research institutions conduct regular geological surveys to document and analyze the formation's structural composition and fossil records.
Access is difficult because the formation lies in remote mountainous areas with no established visitor trails. Experienced guides and proper equipment are necessary to examine the rock exposures.
The layers contain remains of prehistoric plants such as Coussapoa camargoi and Ficus andrewsi, offering insight into ancient tropical forest ecosystems. These plant fossils show that the region was once covered in subtropical vegetation.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
