Beacon Limestone Formation, Jurassic limestone formation in southern England, Great Britain.
The Beacon Limestone Formation is a Jurassic limestone deposit in southern England consisting of two contrasting layers. The lower portion contains iron-rich oolitic limestone, while the upper section shows nodular limestone displaying gray to reddish-brown tones.
This formation developed about 185 to 175 million years ago during the Early Jurassic period, spanning the Pliensbachian and Toarcian ages. It represents a critical record of the marine environments that existed during this distant geological time.
The formation holds the Strawberry Bank Lagerstätte, containing preserved remains of marine creatures that shape our understanding of prehistoric life.
The layers of this formation are visible from the Dorset coast to Chipping Sodbury, with varying thickness depending on location. Visitors should be prepared for accessibility to exposed sections to change with seasons and weather conditions.
Within this layer lies the Strawberry Bank Lagerstätte, where well-preserved remains of ichthyosaurs and other marine reptiles have been discovered. This exceptional preservation allows researchers to gather detailed information about life in ancient seas.
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