Paleozoic Era
This is the first of three geologic eras squeezed into the last 10% of the Earth's whole geologic history.
cotf.edu/ete/modules/msese/earthsysflr/... Fossils of the Middle and Upper Paleozoic Fossils of the Middle and Upper Paleozoic
https://www.mtholyoke.edu/courses/mdyar/slides/Pal... Upper Paleolithic The Upper Paleolithic (or Upper Palaeolithic, Late Stone Age) is the third and last subdivision of the Paleolithic or Old Stone Age. Very broadly, it dates to between 50,000 and 10,000 years ago, roughly coinciding with the appearance of behavioral modernity and before the advent of agriculture.
https://en.wikipedia.org/wiki/Upper_Paleolithic