5 meters downhill, the Henkeput almost connects with another (neolitical) flint-mine
This one was absolutely not dug for marl. Not for loose mark to fertilize the land and not for blocks. Way too much flint to even try cutting blocks of marl. There is a big dump with only flint-shards in front of the cavity. Imagine neolitical males and females sitting here in the cavity, cutting flint for tools, and a few thousand years later I hide there for the rain and eat my bread... and I picked up some shards of flint for Amir & Alfredo...
There were thousands of vertical shafts here and a handful of quarries and mines like this. Eight hectares of underground structures in total, from which ca. 8.000 m3 flint was taken... This was a neolitical industrial complex ;)
Also see
http://www.vuursteenmijnen.nl/rijckholt/de-henkeput.htmland
http://nl.wikipedia.org/wiki/Henkeput