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When this timescale is established in the higher (polar) latitudes, it is often correlated at lower latitudes to reconstruct orbital-scale monsoon activity at 23,000-year cycles as well as decay of ice-sheets at both middle and high latitudes.

Climate change back to 5 million years has been established using this technique.

Then age-dating specialists linked those Ar-Ar-dated sediment layers to assumed times for ancient Earth-Sun position shifts. But ironically, a separate chapter in the chart’s book documents how orbital tuning depends on radioisotope dating!

Often, researchers will transfer age assignments from a published geologic chart to local field observations.

This process usually requires the local sediment record to be selectively stretched or shrunk to fit the textbook’s timescale.

Every 32.8 feet (10 m) of change in global sea level causes a 0.1 percent change in 518O.

Scientists can also date the reversals of Earth's magnetic field in ocean sediment cores to add additional absolute dates to a profile.

What would this challenge mean if the team’s age results relied on faulty dating techniques? The team interpreted this to mean that the extinct ape was evolving human-like teeth.

However, extinct Australopiths and other full-on apes also had tooth roots that bent inward, not outward.But nobody knows, and nobody could go back in time to measure how long Earth’s magnetic poles maintained one orientation before reversing direction.The poles could have flipped much faster back then.As discussed earlier regarding the Milankovitch cycles, astronomers have calculated the solar radiation signal over time and have determined that cycles at 41,000 and 23,000 years have produced regular climatic responses.Because of this correlation, these predictable climate cycles can be used as time clocks for dating purposes.Both methods float together, but neither links to reality. team based its challenge of the accepted out-of-Africa story on age dates that rely on nothing more than an extravagantly-dressed belief in evolutionary time.

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