Ilek Formation, Geological formation in Western Siberia, Russia.
The Ilek Formation is a geological layer in Western Siberia composed of multiple strata including clay, siltstone, marl, and sandstone deposited over time. This formation reaches depths of approximately 746 meters in the Teguldet borehole area.
This formation originated during the Early Cretaceous period and was first documented in 1935 by scientist L. A. Ragozin as a major geological structure. Since then it has remained central to understanding early Cretaceous conditions in Siberia.
Scientists and researchers from various institutions conduct regular expeditions to study the formation's extensive collection of prehistoric fossils and geological compositions.
Access to this formation is limited to drilling operations and scientific research expeditions with specialized equipment. Visits are restricted to professional teams studying the fossils and rock samples directly.
Within this layer researchers have identified more than 136 individual theropod teeth representing at least five different dinosaur species. This diverse collection of teeth helps paleontologists understand which meat-eating dinosaurs lived in this region during that time.
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