Cryptic (geology)
The Cryptic era is an informal term for the earliest geologic evolution of the Earth and Moon. It is the oldest (informal) era of the Hadean eon, and it is commonly accepted to have begun close to 4533 million (about 4.533 billion) years ago when the Earth and Moon formed. No samples exist to date the transition between the Cryptic era and the following Basin Groups era for the Moon (see also Pre-Nectarian), though sometimes it is stated that this era ended 4150 million years ago for one or both of these bodies. Neither this time period, nor any other Hadean subdivision, has been officially recognized by the International Commission on Stratigraphy.
Territorial state
After the collapse of the Harappan Civilization in 1700 BC, India underwent a transition from complete territorial rule to sovereign territorial states. During this time, Indo-Aryans and the Vedic peoples made way into the territory of India and made a set of religious texts known as the Vedas, hence the time period known as the Vedic Age (1700 - 600 BC). With Hinduism also on the rise, it gave way to independent states where each had to maintain peace and order with other neighbouring independent states. Unlike most independent states, there were differences in power among those residing in India. This however did not last due to the Mauryan Empire preventing sovereign states from acquiring power. The Mauryan Empire lasted from 272 BC to 231 BC in which the death of the last ruler Asoka allowed the next empire (the Mughal Empire) to reestablish new sovereign states.