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Tephra horizons
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Subcategories
This category has the following 3 subcategories, out of 3 total.
A
Ash horizons (volcanic)
(7 C, 4 F)
B
Bimodal tephra horizons (basalt-rhyolite) from the Torfajökull-Veiðivötn eruptions
(5 F)
T
Tephra horizons in Italy
(2 C)