Do you mean 'Siberia'? Its basically the north part of Asia. Currently, and historically, Siberia is under Russian control.

If you mean the Siderian period, it was the first geologic period in the Paleoproterozoic Era and lasted from 2500 to 2300 million years ago.

The full list of Eras would be Eoarchean, Paleoarchean, Mesoarchaean, Neoarchaean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic, Paleozoic, Mesozoic, and Cenozoic.

Everything prior to the last three are sometimes informally lumped together as "Precambrian".

The geologic time scale is divided into eons. The eons are broken down into eras, which then are broken down into periods. I will list the correct divisions below.

Eons: Phanerozi, Proterozoic, Archean

Eras: (Phanerozic): Cenozoic, Mesozoic, Paleozoic

(Proterozoic):Neoproterozoic, Mesoproterozoic, paleoproterozoic

(Archean): Neoarchean, Mesoarchean, Paleoarchean, Eoarchean

(Cenozoic)Quaternary, Neogene,Paleogene

(Mesozoic)Cretaceous, Jurassic, Triassic

(Paleozoic)Permian, Carboniferous, Devonian, Silurian, Ordovician, Cambrian

(Neoproterozoic)Ediacaran, Cryogenian, Tonian

(Mesoproterozoic)Stenian, Ectasian, Calymmian

(Paleoproterozoic)Statherian, Orosirian, Rhyacian, Siderian

The Vishnu Complex or Vishnu Metamorphic Complex is the basement metamorphic Paleoproterozoic schist and gneiss rock unit of the Grand Canyon of Arizona. It consists of two major units of rock, the dark-colored, fine-grained Vishnu Schist, metamorphosed Paleoproterozoic sedimentary rocks, that have been intruded by the second unit, a pink-colored gneiss that began as the Zoroaster Plutonic Complex.

These complexes were named by CD Walcott in 1883. Scientists often use deity names to describe things. It is not intended to offend anyone.

The geologic time scale refers to measuring the layers of the earth's crust according to what time in history they refer to. In order, the eras from the Precambrian to the present are as follows: Neoarchean, Paleoarchean, Mesoarchean, Neoarchean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic, Paleozoic, Mesozoic, and Cenozoic.