Wallumbilla Formation, Geological formation in Queensland, Australia.
The Wallumbilla Formation is a geological sequence of rock layers found across Queensland, the Northern Territory, South Australia, and New South Wales. It is primarily composed of mudstone and siltstone arranged in distinct strata that hold evidence of ancient marine conditions.
The formation developed during the Early Cretaceous period roughly 125 to 101 million years ago, when seawater covered extensive areas of eastern Australia. These layers record a period when marine sedimentation actively shaped the region.
Australian geologists and researchers study this formation to understand the evolution of marine environments and prehistoric life forms in the eastern regions.
The formation can be accessed at several research sites across the region, where geologists examine the rock layers and collect material samples. Planning ahead and seeking local guidance is necessary to reach these geological sites safely.
The layers contain remains of marine reptiles such as the pliosaur Kronosaurus and the ichthyosaur Platypterygius, which swam in these ancient seas. These fossil discoveries help researchers understand the diversity and behavior of these prehistoric ocean creatures.
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