Dating of rocks fossils and geologic events lab answers

The contact between the granite and the conglomerate is irregular, similar to how the present-day surface of the land is irregular.The diagram below is a simplified representation of the stratigraphy of the Grand Canyon.Therefore, at any time, the total of parent isotope fraction and daughter isotope fraction add up to 1.

Refer to the Lab Assignments Grading Rubric for a reminder of what constitutes a well-performed lab.

You can use principles of relative geologic age to determine sequences of geologic events, including rock formations, intervals of erosion, tilting, folding, and faulting like those represented in the block diagrams and cross-sections below.

Be sure to review the principles of relative geologic age on the Geologic Time Basics page .

The same isotope system is used for each pair of samples, but the daughter to parent ratio is different in each sample.

How would you use these data to calculate the geologic age indicated by the isotopes in each sample?

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