Geologic Eras

Geologic Time Scale

http://www.geo.ucalgary.ca/~macrae/timescale/timescale.html

The Geologic Time Scale (USGS)

http://geology.er.usgs.gov/paleo/geotime.shtml

Web Time Machine

http://www.ucmp.berkeley.edu/help/timeform.html

Geologic Time Table

http://www.geo.wvu.edu/~wilson/geol1/lec43b/EHist1.htm

Toilet Paper Geologic Time Scale (Learning Activity)

http://www.nthelp.com/eer/HOAtimetp.html

Making the Geologic Time Scale Real (Learning Activity)

http://www.accessexcellence.com/AE/AEPC/WWC/1991/geologic.html

Paleozoic Era (Earth and Space Science for Middle School Teachers)

http://www.gpc.peachnet.edu/~pgore/Earth&Space/paleozoic.html

A Chart of Geologic Time from a Trilobite's Point of View

http://www.aloha.net/~smgon/trilobite.htm

Evolutionary Clocks

The Age of the Earth FAQS

http://www.talkorigins.org/origins/faqs-youngearth.html

Radiometric Dating and the Geologic Time Scale

http://www.talkorigins.org/faqs/dating.html

Radiometric Time Scale

http://pubs.usgs.gov/gip/geotime/radiometric.html

Geologic Time: Radiometiric Dating

http://www.uaf.edu/geology/courses/spring99/Geos212/RadioDating.html

Geologic Time and the Rock Record

http://www.es.ucsc.edu/~es10jsr/classnotes/Lectures/lecture.06.html

Geologic Time: Relative and Absolute Dating (Learning Activity)

http://btc.montana.edu/nten/trc/lesson5/lesson5_text.shtml

Time and Change/ Using Radioactive Decay to Determine Geologic Age (Learning Activity)

http://www.usgs.gov/education/learnweb/Lesson4.html

Plate Tectonics

Introduction to Plate Tectonics

http://volcano.und.nodak.edu/vwdocs/vwlessons/plate_tectonics/introduction.html

An Introduction to Plate Tectonics

http://www.eas.slu.edu/People/CJAmmon/HTML/Classes/IntroQuakes/Notes/plate_tect01.html

An Introduction to Plate Tectonics

http://www.hartrao.ac.za/geodesy/tectonics.html

Plate Tectonics (Learning Module)

http://www.platetectonics.com/

An Introduction to the ABC's of Plate Tectonics

http://webspinners.com/dlblanc/tectonic/ptABCs.shtml

Information on Plate Tectonics (USGS)

http://geology.er.usgs.gov/eastern/tectonic.html

Plate Tectonics Animation

http://www.ucmp.berkeley.edu/geology/tectonics.html

Plate Tectonics and Sea Floor Spreading

http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/framework.html

Extinctions

Teaching Documents about Mass Extinction Events

http://www.uni-wuerzburg.de/mineralogie/palbot/teach/extinctionteach.html

The Extinction Files (BBC)

http://ftp.bbc.co.uk/education/darwin/exfiles/index.htm

Extinction

http://fig.cox.miami.edu/Faculty/Tom/bil160/10_extinct.html