University of California
University of California Museum of Paleontology: Geology and Geologic Time
This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.
![Texas State Historical Association: Texas Geology Map [Pdf] Graphic](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Texas State Historical Association: Texas Geology Map [Pdf] Graphic")
Texas State Historical Association
Texas State Historical Association: Texas Geology Map [Pdf]
A black and white outline map that can be colored in, using the key provided, to show the geologic periods in Texas history. A full color map is available in the Texas Almanac, which is free to download from the main website.
Woods Hole Oceanographic Institution
Woods Hole Oceanography Institute: History of the Earth
This interactive timeline reveals key geologic and biological events starting back 4.8 billion years to the present.
CK-12 Foundation
Ck 12: Earth Science: Geologic Time Scale
[Free Registration/Login may be required to access all resource tools.] How the geologic time scale is divided.
Center for Educational Technologies
Earth Floor: Geologic Time
This is a nice explanation of geologic time and Earth's major eras. Although this site is designed for younger students, it is mostly text with few images.
CK-12 Foundation
Ck 12: Plate Tectonics and Seas of the Paleozoic and Mesozoic Era Study Guide
[Free Registration/Login may be required to access all resource tools.] Provides a brief overview of plate tectonic activity during the Paleozoic and Mesozoic eras and the changes in sea level that occurred. Includes some questions to...
CK-12 Foundation
Ck 12: Biology: Evolution of Multicellular Life Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on the evolution of multicellular life.
CK-12 Foundation
Ck 12: Earth Science: Geologic Time Scale Study Guide
Take a quick look at Earth's geologic time scale.
Children's Museum
Children's Museum of Indianapolis: Geologic Timeline
Here is an excellent example of a picture timeline. Follow the Eras of the Earth from Cenozoic all the way down to Precambrian with the use of fossils.
ClassFlow
Class Flow: Life & Geologic Time
[Free Registration/Login Required] This Flipchart accompanies chapter 14 in the Glencoe Earth Science text. The flipchart contains pictures that help students learn about Geologic time: Paleozoic, Mesozoic, Cenozoic and explains...