Supplementary data and bibliography to "The distribution of querns and millstones of Mayen lava in the Early Middle Ages (c. 500 to 1050 A.D.)"

Supplementary data and bibliography to “The distribution of querns and millstones of Mayen lava in the Early
Middle Ages (c. 500 to 1050 A.D.)”; list of findspots for the following maps:

fig. 1. Findspots of basalt-like lava (tephrite) dating from c. 30 BC to 275 AD.

fig. 2 Findspots of basalt-like lava (tephrite) dating from c. 275 AD to 500 AD.

fig. 3 Findspots of basalt-like lava (tephrite) dating from c. 500 AD to 750 AD.

fig. 5 Findspots of basalt-like lava (tephrite) dating from c. 750 AD to 1050 AD.