Weaubleau structure, Meteorite impact site in St. Clair County, Missouri, United States
The Weaubleau structure spans 19 kilometers in diameter and contains distinct geological formations with deformed Mississippian strata and overlying Pennsylvanian rocks.
A meteorite measuring 370 meters struck this location between 335 and 340 million years ago during the middle Mississippian Period, creating a substantial impact crater.
Local residents and geologists refer to specific spherical rock formations in the area as Missouri rock balls and Weaubleau eggs, which formed during the impact.
Visitors can examine the geological features along Missouri Highway 13, where fractured rock strata reveal evidence of the ancient impact event.
The structure contains resurge breccia composed of marine deposits, fossils, and sedimentary fragments from Ordovician, Devonian, and Mississippian periods.
Location: Missouri
GPS coordinates: 37.98330,-93.63330
Latest update: March 4, 2025 04:29
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