The age they came back with was only a few thousand years old. And kept their theory that dinosaurs lived "millions of years ago" instead. They then use potassium argon, or other methods, and date the fossils again.This date did not fit the preconceived notion that dinosaurs lived millions of years ago. They do this many times, using a different dating method each time.To help determine the timing of eruptive activity, geologists use a radiocarbon age-dating technique.Collecting charcoal is the most common method used in Hawai‘i, not only by geologists, but also by archaeologists, ecologists and others. Carbon-14 is produced in the atmosphere and readily utilized by plants to build tissue, fiber and wood.Morris cited other examples of anomalous dates produced by excess argon and falsely claimed that it is a universal problem for K-Ar dating. The problem is not universal, as the majority of minerals and rocks dated by K-Ar do not contain the excess argon. Rangitoto is generally regarded as young for several reasons.

Geochronology and Thermochronology by the 40Ar/39Ar Method.

Results seemed to show that Rangitoto was not a few hundred years old as it appeared to be. This is about the age all evidence points to except potassium-argon dating.

Ages from the 10 samples ranged from 146,000 years up to almost half a million years! If lava which is little more than 200 years old can be wrongly dated at up to 465,000 years by the potas­sium-argon method, could potas­sium-argon dating always be wrong?

Many people are under the false impression that carbon dating proves that dinosaurs and other extinct animals lived millions of years ago.

What many do not realize is that carbon dating is not used to date dinosaurs. Carbon dating is only accurate back a few thousand years.