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.
Hades
Hades obtained his wife and queen, Persephone, through abduction at the behest of Zeus. This myth is the most important one Hades takes part in; it also connected the Eleusinian Mysteries with the Olympian pantheon, particularly as represented in the "Homeric Hymn to Demeter", which is the oldest story of the abduction, most likely dating back to the beginning of the 6th century BC. Helios told the grieving Demeter that Hades was not unworthy as a consort for Persephone: