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A Geologic Time Scale 1989 Wallchart (Cambridge Earth Science Series)
A Geologic Time Scale 1989 Wallchart - Cambridge Earth Science Series Author:W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith, D. G. Smith This newly designed wallchart is compiled from information published in A Geologic Time Scale 1989, W. B. Harland, Cambridge University Press 1990. The geologic scale is illustrated in three panels: a panel spanning all of geologic time and two others showing Phanerozoic and Quaternary details.