once I am not on mobile I can do better than Wikipedia but at first glance this might be a good place to start: https://en.wikipedia.org/wiki/Geologic_temperat

once I am not on mobile I can do better than Wikipedia but at first glance this might be a good place to start: https://en.wikipedia.org/wiki/Geologic_temperature_record#Pleistocene https://en.wikipedia.org/wiki/Geologic_temperature_record#Pl...