Inclusion relative dating
When water-laid sediments are deposited in layers that are hor…. Rock originally formed horizontal when shifted it happens afte…. Structures or geological units that cross-cut or overprint oth….The forces and processes that we observe today have been at wo….Scientists are continuing to unravel the events that might have occurred millions and billions of years ago in the earth’s history.
From the results of studies on the origins of the various kinds of rocks (petrology), coupled with studies of rock layering (stratigraphy) and the fossils they contain (paleontology), geologists have associated layers of rocks with sequence of events thought to have occurred over hundreds of millions of years.
William Smith's collecting and cataloging fossil shells from rocks led to the discovery that certain layers contained fossils unlike those in other layers (see: fossil sorting).
Using these key or index fossils as markers, geologists began to identify a particular layer of rock wherever it was exposed.
Some types of relative dating techniques include climate chronology, dendrochronology, ice core sampling, stratigraphy, and seriation.
Between the years of 17, James Hutton and William Smith advanced the concept of relative dating.
States that only violent disasters could modify the surface of….