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Drilling/drill rig
GISP
4
Ion chromatography
4
Methane sulfonic acid
4
Sampling/drilling ice
4
AGE
2
DEPTH, ice/snow
2
DRILL
2
Depth
2
Depth, bottom/max
2
Depth, top/min
2
GRIP/GISP/NGRIP
2
Greenland Ice Core Projects
2
Greenland Ice Core Projects GRIP/GISP/NGRIP
2
bottom/max
2
ice/snow
2
top/min
2
Age, maximum/old
1
Age, minimum/young
1
GISP2-D
1
GISP2-F
1
Greenland
1
maximum/old
1
minimum/young
1
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