Remember the oldest first event is always on the bottom.
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Folded and faulted sediments. Before attempting this excercise locate and draw in any faults that you see. Examples of possible events that may or may not be found: Print out the following pages and practice your skills at relative age dating and critical thinking. You may have to look up some terms.
Finding Lab Activities Online
Absolute Age dating is determining the actual age of an event or feature in years. There are numerous methods of absolute age dating, such as counting tree rings, coring glacial ice, and counting sediment varves. However, these methods are only useful in dating recent events, that is those occurring within the last few thousand or million years. Radiometric dating , which uses the rate of disintegration of radioactive isotopes to daughter products, enables geologist to date events as recent as a few thousand years and as old as a several billions years.
Once the half life of an isotope is known, the age of a rock containing it can be determined by measuring the relative proportion of the radioactive parent and its daughter product. To learn more about the position and instructions to apply, visit this website. The mission of The Geological Society of America is to advance geoscience research and discovery, service to society, stewardship of Earth, and the geosciences profession.
Extra Credit Lab Assignments, Fall - 2004
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Finding Lab Activities Online As many us work on developing online courses we have to ask ourselves how to implement lab activities. General Exploring Earth Investigations by McDougal Littell Publishing - numerous online activities that use animations, interactive graphics, and imagery to help students gather information gleaned from lecture content Geology Lab Videos by Tom Braziunas at North Seattle Community College - students can view short video demonstrations of some of the physical geology lab activities Reynolds, et al.
Exploring Geology, 2nd Edition.
The instructor DVD comes equipped with some great Google Earth exercises that would work well for online labs. In addition, it also has investigations at the end of each chapter that could be used for online labs. Plate Tectonics Plate tectonics laboratory using plate motions 3 exercises by Richard Harwood of Black Hawk College — interactive maps showing movement relative movement of plates, are multiple choice and self-checking.
Jules Verne Voyager - This is an interactive map developed by UNAVCO where students can add earthquakes, stress axes, volcanoes, or plate boundaries to the entire world or by country. For more information on the project as well as instructions on how to use the site: Minerals Online rock and mineral identification kit by Jonathan Evenick of the University of Tennessee — provides photographs and descriptions of various rocks and minerals.
Mineral identification and properties using photographs by Richard Harwood of Black Hawk College — students can identify minerals photographs based on mineral property choices. This site has been taken down. Contact us if you know of a suitable replacement. Searchable mineral database by Amethyst Galleries, Inc.: Students can search for minerals by class or alphabetically. Descriptions of each mineral include physical properties, crystallography information, common uses, and chemical formulas as well as pictures.
Mineral identification by Dave Jessey and Don Tarman through Cal State Pomona — students can use this site as a step-by-step tutorial to identify mineral sample. Igneous Rocks Igneous rock identification using photographs by Richard Harwood of Black Hawk College — students can identify igneous rock photographs based on rock property choices, self-checking. There are two parts to this lab exercise A. Part 1 is on absolute age determinations using radioactive isotopes and their daughter products in geological materials. In Part 2 you will use the principles of relative dating to determine sequences of geological events as indicated by the layers and structures in the rocks.
Part 2 ends with an application of the principles of relative dating to the rocks of the Grand Canyon. E-mail a copy of your certificate to the Assignments folder in the virtual classroom, or else mail in a hard copy, or both. Carbon decays to Nitrogen with a half-life of 5, years.
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With such a geologically short half life, carbon can only be used to determine ages of relatively young materials, less than 70, years old. Older materials have so little carbon left that it cannot be accurately measured.
Finding Lab Activities Online
Thus, carbon is of no use in determining the absolute ages of, for example, dinosaur fossils. The only materials that start out with usable amounts of carbon in them are carbon-bearing materials which derived their carbon immediately from the atmosphere or from shallow water.
This means that the remains of living things are useful for carbon dating. Most rocks, however, are not useful for carbon dating either not enough carbon, or didn't derive its carbon from the atmosphere-shallow water reservoir. Print out the Relative Dating Lab Exercises http: Before you perform the Relative Dating Lab Exercises you should read the following Web pageFor background explanations and illustrations: