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Western Oregon University: Earth System Science: Geologic Time [Pdf]
An 81-page slideshow that looks at the principles of geology with respect to relative dating, at different concepts describing geological processes, at absolute age and radiometric dating, at the eons and eras in the geologic time scale,...
Science Education Resource Center at Carleton College
Serc: Investigating the Geologic Time Scale: Trends in Geologic Time
In this Earth Science indoor laboratory inquiry, learners will create their own geologic time scale based on observation of teacher supplied, historically correct fossil data and also relevant rock samples with the age of the rock sample...
US Geological Survey
U.s. Geological Survey: Geologic Time
A discussion of geologic time, how scientists use the concept, and how they have determined its span.
University of California
University of California Museum of Paleontology: Geologic Time
Learn about geologic time, including the age of the Earth by putting it in terms of pages in a book.
Georgia Department of Education
Ga Virtual Learning: Geologic Time and Correlation
In this amazing interactive tutorial you will learn about what methods are used by geologists to learn about the history of the Earth. Investigate a geologic time scale and learn about how scientists have developed and organized a record...
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.
US Geological Survey
Usgs: Geologic Time
This large U.S. Geological Survey site offers a look at the age of the earth, how radiometric dating is used to calculate it, the major divisions of geologic time, and the classification and use of fossils.
US Geological Survey
U.s. Geological Survey: Fossils, Rocks, and Time
Publication delves into the importance of studying the Earth's history and how we go about doing it. View pictures and diagrams showing the geological time scale and fossil succession.
Talk Origins Archive
Talk Origins Archive: Radiometric Dating and the Geological Time Scale
A lengthy article with lots of information about radiometric dating, including pictures and charts.
US Geological Survey
U.s. Geological Survey: Mud Fossils
Two part lesson allows for students to observe real fossils then make and recover their own fossils using mud.
University of Oxford (UK)
Oxford University Museum of Natural History: The Learning Zone: Fossils
This excellent website walks students through the basics of understanding fossils. It emphasizes that most common fossils would be invertebrates and, after learning more about these life forms, students can choose to take a quiz. The...
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Mud Fossils
In this lesson students will look at the major divisions of geologic time and learn about the fossils and forms of life which existed during those periods, helping them to understand how the age of rocks are preserved.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Geologic Time: The Oligocene
Travel through Earth's history to learn about the Oligocene time period, which is characterized by the appearance of most of the living families of mammals.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Geologic Time: Hadean Eon
Journey into the past while reading this comprehensive overview of the Hadean Eon that covers topics such as the formation of the earth, its surface and atmosphere, fossil evidence, erosion and plate tectonics.
Other
Virtual Fossil Museum: Fossils Across Geological Time and Evolution
Learn about fossils throughout geological time. Includes images of different types of fossils.
American Geosciences Institute
American Geosciences Institute: Fossils
Seven hands-on lessons module where students learn about fossils. These inquiry-based investigations explore how fossils form, properties of fossils, comparing fossils, how they show the age of the Earth, and what paleontologists do.
Science Education Resource Center at Carleton College
Serc: Layer Cake Geology
Using a cake analogy, this activity teaches concepts such as: geologic time, rock layers, fossils, Law of Superposition, and relative dating. Activity can be modified to grade level and appropriate content for students,
Other
Black Hills Institute of Geological Research: All About Fossils
The Black Hills Institute of Geological Research is a world-renowned center for paleontology. Here they describe in clear language how fossils are formed and preserved, and what information they give us about the past, particularly in...
Georgia Department of Education
Ga Virtual Learning: Historical Geology
In this interactive tutorial you will explore how geologists use clues in rocks to determine the order in which rocks formed. Learn how principles of radioactivity are used to assign actual ages to rocks. Students will explore fossils...
Curated OER
National Park Service: Fossils in Time Unit
For this lesson, students learn about the earth's past by studying clues that have been left behind, such as fossils and rocks. Students will find the answers to many questions: What is paleontology?, What is geological time?, What can...
American Geosciences Institute
American Geological Institute: Evolution and the Fossil Record
The American Geological Institute has done an excellent job of defining and explaining evolution in this online booklet. Darwin, fossils, natural selection, and change over time are some of the concepts that are covered. Make sure to see...
University of California
University of California Museum of Paleontology: Stories From the Fossil Record
This colorful, interactive site demonstrates how fossils can be used to discover a range of information about the past. Topics include Past Lives, Paleoecology, Geologic History, and Biodiversity.
Other
The Paleontology Portal: Fossil Gallery
An image gallery of fossils through time. Students choose a time period to see what life was like by studying the fossils.
Estrella Mountain Community College
Online Biology Book: Paleobiology: Fossils and Time
Find out how fossil evidence has been the major link to learning about Earth's geologic history. See several illustrated interpretations of a geologic time scale in this online biology textbook.