Initial Publication Date: February 10, 2012

Historical Geology Timelines

Pam Nelson, Physical Sciences, Glendale Community College (AZ)


These 11x14 diagrams show the distribution of geologic, biologic and climatic change over Earth's history. The packaged PDF includes Precambrian, Paleozoic, Mesozoic & Cenozoic Eras (1 page each).


How this visualization is used in class:

These sheets are used as reference pages to assist students in correlating the various changes that occur over geologic time and how they relate to one another and/or make conditions right for another to occur. This addresses relative passage of time and conditions but lacks a specific reference or understanding of the passage of the billions to millions of years of time passing to allow this to occur which must be supplemented by the instructor.

Advice on using this visualization in the classroom:

Utilize this with any of the standard Historical Geology textbooks that separate the geology and biology of the each Era into two separate chapters to assist in student correlation.


Myself & Gwenn Ziegler (GCC Lab Tech)

Visualization and Supporting Materials

Historical Geology Timelines (Acrobat (PDF) 453kB Feb8 12)