![On salt, copper and gold - Early salt‑mining systems and strategies at Duzdağı, Nakhchivan - MOM Éditions On salt, copper and gold - Early salt‑mining systems and strategies at Duzdağı, Nakhchivan - MOM Éditions](https://books.openedition.org/momeditions/docannexe/image/12432/img-18-small700.jpg)
On salt, copper and gold - Early salt‑mining systems and strategies at Duzdağı, Nakhchivan - MOM Éditions
![hatchet of green-gray rock, pointed and oval in cross-section, partly rough, smooth at the edge, ax, stone, length: 9.3 cm, prehistoric -4000 Stock Photo - Alamy hatchet of green-gray rock, pointed and oval in cross-section, partly rough, smooth at the edge, ax, stone, length: 9.3 cm, prehistoric -4000 Stock Photo - Alamy](https://c8.alamy.com/zooms/6/c83f174a4862442492b3b6c0de2d50c1/2b0g1bc.jpg)
hatchet of green-gray rock, pointed and oval in cross-section, partly rough, smooth at the edge, ax, stone, length: 9.3 cm, prehistoric -4000 Stock Photo - Alamy
![basalt from the Baltic Sea coast in Waabs, Germany isolated on white background Stock Photo | Adobe Stock basalt from the Baltic Sea coast in Waabs, Germany isolated on white background Stock Photo | Adobe Stock](https://t4.ftcdn.net/jpg/05/28/55/93/360_F_528559379_rKS7RPlKeTKbGBMFQVFh3MmUtDcr9H26.jpg)
basalt from the Baltic Sea coast in Waabs, Germany isolated on white background Stock Photo | Adobe Stock
![Search Our Collections | The Institute for the Study of Ancient Cultures of the University of Chicago Search Our Collections | The Institute for the Study of Ancient Cultures of the University of Chicago](https://isac-idb-static.uchicago.edu/multimedia/29258/IMG_0225.1920x1200.jpg)
Search Our Collections | The Institute for the Study of Ancient Cultures of the University of Chicago
![stone ax with rectangular cross-section. Originally beautifully cut, but strongly weathered, crumbled cut. Rough dark rock (amphibolite, ax, stone, 13.9 x 5.3 cm, prehistoric -4000 Stock Photo - Alamy stone ax with rectangular cross-section. Originally beautifully cut, but strongly weathered, crumbled cut. Rough dark rock (amphibolite, ax, stone, 13.9 x 5.3 cm, prehistoric -4000 Stock Photo - Alamy](https://l450v.alamy.com/450v/2b0g00b/narrow-flint-stones-ax-with-rectangular-cross-section-ax-stone-length-74-cm-prehistoric-4000-2b0g00b.jpg)