By combining knowledge gained using both relative and absolute dating processes geologists have been able to produce the geologic time scale.
is a way to use geometric relationships between rock bodies to determine the sequence of geologic events in an area.
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.
In 1788 John Playfair came to see Hutton’s Unconformity in Inchbonny.Not only did the rock layers indicate changing environments they also revealed that different life forms have existed in different times.The most obvious feature of sedimentary rock is its layering.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.