Volcano

Eruption

(year)

Fe

(mg/kg)

CA

S (mg/kg)

Fe/S

CA/CAOb

lnCA/CAO

Timec

(yr)

Mount Ontake, Japan

2014

33,312

29,531

1.13

1

0

0

Kasatochi, Alaska

2008

157,942

14,572

10.8

0.493

−0.70

6

Lombok, Indonesia

1994

60,961

701

87.0

0.0240

−3.74

20

Mount Pinatubo, Philippines

1991

73,857

385

191.8

0.0130

−4.33

23

Mount St. Helens, Washington

1980

23,235

955

24.3

0.0323

−3.43

34

Volcanic stone

Mount Baekdua

969

24,368

191

127.6

-

-

-

Soil

Tongyoung, Korea

-

26,014

1350

19.3

-

-

-