Relative time can not determine the actual year a material was deposited or how long deposition lasted; it simply tell us which events came first.
This process lead to a system of time containing eons, eras, periods, and epochs all determined by their position in the rock record.
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Wind and water erode strata and some areas are uplifted or even tilted.These processes result in All of these processes confuse the stratigraphic record.Although there might be some mineral differences due to the difference in source rock, most sedimentary rock deposited year after year look very similar to one another.This means that a quartz sandstone deposited 500 million years ago will look very similar to a quartz sandstone deposited 50 years ago.This feature is produced by changes in deposition over time.
With this in mind geologist have long known that the deeper a sedimentary rock layer is the older it is, but how old?To deal with many of these problems geologists utilize two types of geologic time: relative time and absolute time.Relative time places events or formations in order based on their position within the rock record relative to one another using six principles of relative dating.Age, race, body size, etc are not important, i will feed you with my hot pussy juice. Love yourself ukulele chords and strumming pattern. Making this processes even more difficult is the fact that due to plate tectonics some rock layers have been uplifted into mountains and eroded while others have subsided to form basins and be buried by younger sediments.