ENCI limestone quarry, Limestone quarry in Sint Pieter, Maastricht, Netherlands.
ENCI limestone quarry is a former extraction site in Maastricht, Netherlands, featuring deep cuts into the earth with long stone walls that expose several geological layers. The site has been converted into a nature area open to walkers after mining operations ended.
The quarry opened in 1921 under a Dutch company to extract limestone for cement production. It operated for nearly a century before closing in 2018.
The quarry walls show clearly visible layers from the Cretaceous period, and visitors walking along the paths can spot fossils embedded in the exposed rock. The site is now managed by conservation groups who organize guided tours through the former extraction area.
The site has marked walking paths and viewpoints that can be visited without a guide, though local conservation groups occasionally offer organized tours. Since all trails are outdoors, visiting in dry weather makes the experience more comfortable.
The rock layers at this site produced one of the earliest known Mosasaurus skulls, a large prehistoric sea reptile, found in the 18th century. The species was later named after the Meuse River that runs near the city, giving it the Latin name Mosasaurus.
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