犬吠層群の火山灰


In2

In3(Na2)

In5

Na-G

In7,In8

In9(Na4b)

In11(Na5)

In16(Kg1,T14)

In18(Kg2b)

In20(Kg3)

Ob1

Ob2

Yk5

Yk9a

Yk12

Kh3b

Kh3c

Kh6b

Kh8.9

Kh9a

Kh9b

Ty1a,Ty1b