The relative dating methods themselves are generally sound when used with good assumptions. Jesus, the creator and eternal Son of God, who lived a sinless life, loves us so much that He died for our sins, taking the punishment that we deserve, was buried, and rose from the dead according to the Bible.
It's called the Principle of Original Horizontality, and it just means what it sounds like: that all rock layers were originally horizontal. As you can imagine, regular sediments, like sand, silt, and clay, tend to accumulate over a wide area with a generally consistent thickness.
It sounds like common sense to you and me, but geologists have to define the Principle of Original Horizontality in order to make assumptions about the relative ages of sedimentary rocks. Say you have a layer of mud accumulating at the bottom of a lake. More sediment accumulates from the leaf litter and waste of the forest, until you have a second layer.
Estimates of the absolute age of prehistoric and geological events and remains amounted to little more than inspired guesswork, as there was no scientific basis for testing such proposals. With this background, it is strange that the standard geologic column that identifies the rock strata on the earth and assigns very old ages to those strata was developed by Sir Charles Lyell in 1830.
This was done 100 years before absolute dating methods were available.
The ten strata systems that compose the standard geologic column are the familiar Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, and Tertiary periods.
Although no absolute methods were available to establish actual dates, Lyell needed to assign very old dates to the strata to make them consistent with the long eons of time that would be necessary to meet the new uniformitarianism theory developed by James Hutton and himself.Discover how geologists study the layers in sedimentary rock to establish relative age.Learn how inclusions and unconformities can tell us stories about the geologic past.Ice core sampling normally uses the assumption that the ring bands observed represents years.One known example where this assumption was used is very misleading.Consequently, today the dates assigned to the standard geologic column are still based upon Lyells assignment where index fossils are used to date the rocks and the rocks are used to date the fossils. Today, it is not surprising that many geologists are rejecting uniformitarianism and embracing catastrophism again.