But we are the only species to have defined a geological period by our activity something usually performed by major glaciations, mass extinction and the colossal impact of objects from outer space, like the one that defines the upper boundary of the Cretaceous.

FORBES: On The Anthropocene Age

During a 4 months period, geological and hydrogeological data on the giant Guaran Aquifer System were critically revised and compiled.

UNESCO: Dublin Core

The Geopark's outstanding historical contribution, both in terms of the development of geological and archaeological sciences is astounding: from the Huttonian Theory, to the naming of the Devonian Period by Sedgwick and Murchison, and even Pengelly's discoveries informing worldwide public opinion as to the antiquity of man.

UNESCO: Global Geoparks