TIME SCALES References

Harland, W.B., R.L. Armstrong, A.V. Cox, L.E. Craig, A.G. Smith, D.G. Smith, 1989, A geologic time scale 1989: Cambridge Univ. Press, Cambridge, 120 p.

Haq, B.U., and F.W. B. Van Eysinga, 1987, Geologic Time Table, 4th Edition, Elsevier, Amsterdam, The Netherlands.

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