Which of the following principles are key to relative dating
D/P is just the ratio of the amount of daughter product isotope to the amount of radioactive parent isotope.
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.
Sandstone and shale, much of it red in color, with river channel cross-beds, stream ripples, and pond desiccation cracks.
Also contains layers of white gypsum where ponds, lakes or coastal lagoons underwent extensive evaporation. Fossils of plants, mostly ferns, and quadruped footprints have been found. The upper part of the group is non-marine and tracks of quadrupeds are found on bed tops.
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.
The cross-section above shows three geologic strata, a layer of sandstone on top of a formation of conglomerate on top of a pluton.