Formed in a Tyneside coal mine in the 1800s, the white mineral barium sulphate, settled out in a water trough and during working shifts was blackened by coal dust. The resulting concretion formed a natural calendar, with a large white layer every Sunday when no work was taking place.
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Details
Creative#:
TOP23858926
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
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