Geological dating problems
For dating back to about 35,000 years, sediment layers are precise. Sediments include different types of pollen depending upon the season.
Consequently, individual years can be identified by season, so there is no possibility of layers being confused.
An error of 90% would, for example, still disprove Young Earth Creationism.Sediment columns giving an unbroken history for more than 25,000 years have been identified in about 30 locations around the world.Coral growth patterns are also seasonal and provide a long independent date history. The dates obtained by different radiometric isotope pairs cross-check each other.Age estimates can be cross-tested by using different isotope pairs.Results from different techniques, often measured in rival labs, continually confirm each other.