GENERAL GEOLOGY

Detailed explanation-1: -The Hadean Eon, named after the Greek god and ruler of the underworld Hades, is the oldest eon and dates from 4.5–4.0 billion years ago. This time represents Earth’s earliest history, during which the planet was characterized by a partially molten surface, volcanism, and asteroid impacts.

Detailed explanation-2: -Earth’s history. Hadean Eon, informal division of Precambrian time occurring between about 4.6 billion and about 4.0 billion years ago.

Detailed explanation-3: -Archean Eon, also spelled Archaean Eon, the earlier of the two formal divisions of Precambrian time (about 4.6 billion to 541 million years ago) and the period when life first formed on Earth.

Detailed explanation-4: -In 2010, an alternative scale was proposed that includes the addition of the Chaotian and Prenephelean eons preceding the Hadean and divides the Hadean into three eras with two periods each. The Paleohadean Era consists of the Hephaestean period (4.5–4.4 Ga) and the Jacobian period (4.4-4.3 Ga).

Detailed explanation-5: -The term Hadean was derived from Greek mythology where “Hades” first referred to the God of the Underworld and later to the Underworld itself. In geological usage, it is commonly equated with “Hell, ” based on the perception that the Earth was extremely hot and turbulent at that time.