Archive for April, 2008

Day 140: Absolute Aging »

By Mr. G on Apr 2, 2008 in Geology, Featured | 0 Comments

After wrapping up work on determining the relative age of rock layers using the principle of superposition and recreating cross sections of rock layers, students were introduced today to the concept of absolute aging: determining the quantitative age of a rock layer or fossil.
These methods incorporate the principles of radiometric dating: the use […]

Day 139: Reverse Cross Section »

By Mr. G on Apr 1, 2008 in Physical Science | 0 Comments

As a way to confirm understanding of all of the relative aging concepts covered over the last several days of class, students today worked to complete a reverse cross section of rock layers.  Instead of using a diagram to determine the order of events that occurred through time, students were given a list of ordered […]

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