The Cottessergroeve is a quarry in a steep wall along the Geul in Cottessen. The quarry was also known as Quartzite quarry or Quarry Wijkerslooth.
Quartzite was mined in this open pit. This quartzite originated in the Namur period of carbon 320-330 million years ago. The stone was broken and shielded at the quarry. It was then delivered to the Chamotte Unie in Geldermalsen for the production of refractory bricks. It was the so-called Dinas stones (fireproof and pebble).
Around 1950 they went underground and drilled a 10 meter long tunnel into the steep wall. Later further tunnels were drilled and the old corridors were filled with rock waste. Extraction was stopped in 1960.
This place is now a nature reserve and geological monument that is owned by Staatsbosbeheer and is open to the public.
The nearby Hoeve Termoere is built with stones from the Cottessergroeve.
August 26, 2019
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