Table 5. Comparison of SPWW spherule types with those found in Greenland and in the Deep Sea
collection.
Relic
Crypto-
Barred
No. of
Unmelted
grains
Glass
crystalline
olivine
G-type
Iron
spheres
examined
(%)
SPWW
88
5
8
16
12
57
1
1
Greenland
92
18
10
5
9
55
1
1
Deep Sea spheres
778
5
9
1
2
52
5
26
(magnetically
collected)
Deep Sea spheres
146
6
10
1
5
44
7
27
(nonmagnetically
collected)
SiO2
Figure 16. Ternary diagram illustrat-
Pyro
xene
ing where the analyzed SPWW
spherules plot in relation to the Deep
Sea and Greenland spherules.
Olivine
Greenland and
Deep Sea Spheres
South Pole Water Well Spherules
MgO
FeO
1
Figure 17. Weight percent Al/Si and Ca/
Al plot of the SPWW spherules as com-
0.1
pared to DSS and chondritic value.
0.01
0.01
0.1
1
Ca/Si
20
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