Mooreville Chalk Formation, Geological formation in Alabama and Mississippi, United States.
The Mooreville Chalk Formation is a geological layer spanning the eastern Gulf Coastal Plain. It features white to light-gray limestone beds interspersed with chalky marl layers that vary in mineral composition and thickness.
This layer formed during the Late Cretaceous period, spanning the early Santonian to early Campanian stages. The deposits record an important phase in the region's geological development.
Scientists regularly study the formation's fossil collections, which include remains of dinosaurs, mosasaurs, plesiosaurs, and primitive birds.
The formation is visible at multiple sites across Alabama and Mississippi where chalk deposits are accessible for study. Visitors can observe the different layers and their composition at these natural exposures.
The Arcola Limestone member within the formation contains tiny calcispheres that are characteristic of its large-scale composition. These microscopic particles help geologists understand the conditions under which the chalk deposits formed.
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