Are Humans a Major and Defining Force on the Geological Scale?
The word “Anthropocene” has had a formidable career in the last few years and is often heard among global change scientists and scholars, in policy circles, green popular movements, and think tanks, and in all spheres where environmental and climate issues are discussed. In the literal, and limited, sense it is a geological concept, on a par with other periods or epochs during the Cenozoic era, such as the Holocene (“Recent Whole,” the period since the last glaciation, ca. eleven thousand years ago). The word anthropos (Greek for “human”) in it indicates that humans, as a collectivity across time, serve as a major and defining force on the geological scale.
Whether this is so is a matter of definition, and it is an ongoing and open issue whether this is the case. The Royal Geological Society of London handles these kinds of issues through its Stratigraphy Commission, which expects to be able to present its view on the matter to the Society by 2016. The chief criterion in their search for evidence is whether there will be enough lasting and significant traits left of the “strata” of the Anthropocene to merit it an individual geological period, or epoch (Zalasiewic et al. 2011). This is less a philosophical or judgmental than an empirical issue. Are the assembled impacts and remnants of human activities in the lithosphere, biosphere, atmosphere, pedosphere (the layer of soils), and cryosphere (the layer of ice) so overwhelming that we can be certain that the “deep future” will still be able to register the strata of humanity embedded into Earth itself?READ MORE>