Recently, a 34-member panel of the Anthropocene
Working Group (AWG) has voted in favour of designating a new geological epoch —
the Anthropocene. An epoch is a subdivision of the geologic timescale. It is
longer than an age but shorter than a period.
The geological periods basically reflect the
natural patterns and changes of Earth history. The periods are further divided into
Epochs and Ages.
The current epoch is the Holocene Epoch of the
Quaternary Period. The Holocene epoch began 11,700 years ago. The proposed Anthropocene
epoch would mark the end of the Holocene epoch.
The term ‘Anthropocene’ was coined in 2000 by
Nobel Laureate Paul Crutzen and Eugene Stoermer. It describes the present
geological time interval in which human activity has profoundly altered many
conditions and processes on Earth.
According to the AWG, the characteristics of the
Anthropocene epoch are: a) unprecedented increase in erosion and sediment
transport associated with urbanisation and agriculture, b) marked and abrupt
anthropogenic perturbations of the cycles of elements such as carbon, environmental
changes generated by these perturbations, including global warming, sea-level
rise, and ocean acidification, c) rapid changes in the biosphere and d) proliferation
and global dispersion of many new ‘minerals’ and ‘rocks’ including concrete, fly
ash and plastics, and ‘technofossils’ produced from these and other materials.
In the future course of action, scientists would
have to find Global boundary Stratotype Section and Point for the Anthropocene epoch.
It is a definitive geologic marker or golden spike which marks the beginning of
an epoch. It must be present globally and should be a part of deposits for
The AWG needs to make a formal proposal to designate
the new geological epoch as Anthropocene. This would be considered by several
more groups of the International Commission on Stratigraphy. The final ratification
will be made by the executive committee of the International Union of
Geological Sciences- an international non-governmental organization devoted to
international cooperation in the field of geology.
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