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Depth
6
bottom/max
top/min
6
AGE
5
Ammonium
5
Calcium
5
Chloride
5
GRIP/GISP/NGRIP
5
Greenland Ice Core Projects
5
Magnesium
5
Nitrate
5
Potassium
5
Sampling/drilling ice
5
Sulfate
5
ice/snow
5
DRILL
4
Drilling/drill rig
4
GISP
4
Sodium ion
4
maximum/old
4
minimum/young
4
GISP2-B
2
Greenland
2
Calcium cation
1
Chloride anion
1
Chromatography
1
Comment
1
Diameter
1
Epoch
1
Fluoride
1
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