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RE: Eons of time (please check the values)
> From: firstname.lastname@example.org [mailto:email@example.com]On Behalf Of Dino
> Guy Ralph
> Sent: Monday, February 14, 2005 12:00 AM
> I think it's a great idea to come up with some way of explaining eons of
> time, but with Crichton's method we're merely replacing one set of
> unfathomably large numbers with another set of mind boggling numbers.
I think anyone who teaches intro paleo or geol courses picks up a few useful
examples of these. Here are a few:
* When in doubt, the old fashioned timeline method. In some classes I students
use 5 m long strips of paper, and plot certain
occurrences on different time scales (from 1mm = 1 Myr to 1 mm = 1 year).
* Length of the arm from shoulder to tip = age of the Earth. So
Shoulder-to-elbow is the Hadean and Archean; the Forearm and Palm is
the Proterozoic; and the length of the middle finger is the Phanerozoic. At
this scale a single pass of a nail file would eliminate
* I have a PowerPoint presentation called the Phanerozoic Hour, scaled so 1
minute = 10 Myr.
And so forth...
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
Building 237, Room 1117
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796