"Pretty wild oscillations": More evidence that the climate wasn't exactly "safe" when CO2 levels were allegedly "safe"

'Woolly mammoth' victim of climate change | The Australian

"The sediment we're getting seems to be suggesting some very dry periods and wet periods and very significant changes," [Wells] said.

"Obviously the climate was doing some pretty wild oscillations. There seems to be some suggestions of greater seasonality than we have today and certainly some evidence of very dry periods."
...
"There seems to be evidence of a heck of a lot of dry periods."