Rules and principles of relative dating


05-Jan-2018 13:09

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.The realization that sediments turn into rock was counter to the view that all rocks on Earth formed in a single creation event.Once Steno recognized that the fossils he was contemplating (sharks teeth and sea shells) were formed in the sediments of oceans he was able to work out the basic rules of stratigraphy.Brongniart was the first to use fossils to date rock strata., which states that geologic events are caused by natural processes, many of which are operating in our own time.Put another way, the natural laws that we know about in the present have been constant over the geologic past.When they put events in chronological order like they use Relative Dating.

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In 1788 John Playfair came to see Hutton’s Unconformity in Inchbonny.Stratigraphy is a branch of geology that studies rock strata with an emphasis on distribution, deposition, age and evidence of past life.