Definite evidence for the Anthropocene?

Slightly off-topic but nonetheless still part of the wider theme of global environmental change, I came across this paper published yesterday which argues that the Anthropocene is 'stratigraphically distinct from the Holocene and earlier epochs'.

There has been much debate as to whether the pervasive impacts of humans on our planet warrant recognition as a new geological era which has been assigned the name of 'The Anthropocene'. Now, the authors of the paper say there is unmistakable evidence for the definition of a new era, unique to the rest of the Holocene.

They explain that 'recent anthropogenic deposits contain new minerals and rock types, reflecting rapid global dissemination of novel materials, including elemental aluminium, concrete and plastics that form abundant, rapidly evolving "technofossils".' They also argue that there are clear geochemical signatures in sediments and ice cores, for example, elevated levels of hydrocarbons and polychlorinated biphenyls. The modification of both the carbon and nitrogen cycles, rates of sea-level rise and accelerating extinctions are also cited as evidence for a stratigraphically distinct era.

A sediment core from west Greenland with distinct layers of proglacial sediment and non glacial organic matter as a result of glacier retreat due to global warming. The dotted line represents the onset of the Anthropocene. (Source: https://www.sciencemag.org/content/351/6269/aad2622)