Relative dating worksheet geology
The Paleozoic strata do not include the Temple Butte Limestone and Surprise Canyon Formation, which are not widespread in the Grand Canyon.Some formations of rock younger than Paleozoic, also not widespread in Grand Canyon, are not included here. There is a major nonconformity, a major angular unconformity and a major disconformity. Below is a stratigraphic sequence for the the Grand Canyon in the form of a table.
Similarly, the percentage of parent isotope percentage and daughter isotope percentage add up to 100 at all times.D/P is just the ratio of the amount of daughter product isotope to the amount of radioactive parent isotope.The half-life is a constant, a number, which depends on the isotope.An isotope system is assumed to be a closed system with regard to the parent and daughter - they remain within the system and do not leave it, and at the same time no isotopes of the parent or daughter type enter the system from outside.(In reality, rocks, minerals and other geologic materials can be checked to see if the isotope system remained closed, rather than assuming so.) At time zero, 100% of the isotopes are the parent isotopes.There are three parts to this lab: working with graphs and calculations to derive absolute ages based on the decay of radioactive isotopes, practice using the principles of relative geologic to determine age sequences represented on cross-sections and block diagrams, and applying relative geologic age principles to the geology of the Grand Canyon.
Refer to the Lab Assignments Grading Rubric for a reminder of what constitutes a well-performed lab.
For study purposes, some parts of the Grand Canyon stratigraphy are not shown in the diagram.
The Precambrian strata have been reduced to a representative set of formations.
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When you go to Grand Canyon National Park in Arizona and hike down the Kaibab Trail, from the South Rim to the Colorado River, a mile below, you will pass through these formations of rock.