palaeozoic [Adjective] + rock [Noun]

Strength Strength Dispersion
A:
17
CHISQ:
860.36
AWT:
11,681,930
TTEST:
4.04
G2:
110.78
FAWT:
4.65
MI:
5.71
LOGLOG:
23.36
JD:
0.59
MI3:
13.89
DICE:
0.37
RANGE: