Planetary chronology is disturbed by Human Nature.
Planetary Nature is regular to the Earth: accruing of matter on the surface, seasonal variation, and orbital patterns. All but orbit has been upended by human activity, affecting both the geosphere (by means of anthropogenic sediment [1] and extraction [2]) and the atmosphere (by means of the dramatically changing climate [3]).
Even the cryosphere, tempestuous and varied as a record keeper, is permanently altered as the glaciers melt. [4] Earthly matter is no longer a reliable chronology of the Planet, the present illegible to the future.