Yali Pumice Quarry - Gyali, Greece
Posted by: 
Becktracker
N 36° 39.518 E 027° 06.767
35S E 510079 N 4057010
The Yali pumice quarry is mining up the island Gyali in Greece
Waymark Code: WM15P63
Location: Greece
Date Posted: 02/01/2022
Views: 1
From Kos, we went to see the Nisyros volcano. On the boat trip from Kos to Nisyros, we passed two islands. On one of the islands there was a giant quarry. It seemed like whole the siland is being dug up. As we were passing the island, it wasn't possible to get a closer look or find any sign.
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About 200,000 years ago, a volcanic eruption took place on the neighboring island of Nysiros. During the eruption, large amounts of hot pumice were thrown into the sea. The seawater suddenly cooled the pumice, changing its structure and giving it its unique pozzolanic properties. Later, the seabed and the island of Gyali emerged, with one of the largest pumice deposits in the Western Hemisphere.
The deposit on Gyali Island currently consists of about 100 million tons of pure pumice. On average, about 1 million tons of pumice are mined, screened and shipped annually.
Assuming mining continues at the same pace, the YALI® depot is currently available beyond 2100.
Yali® is mined in opencast mining without explosives with bulldozers. The bulldozers push the pumice off the mountain onto an automatic conveyor system, which transports the pumice to a separation plant.
In the separation plant, the pumice is sieved into different grain sizes, which are stored separately in large storage facilities.
From the warehouse, the pumice stone is loaded directly into seagoing vessels up to 26,000.00 MTS via a conveyor belt at a loading speed of approximately 1,000.00 MTS per hour.