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This is a list of the main divisions by continent and region. Dating also varies considerably and those given are broad approximations across wide areas. The three-age system has been used in many areas, referring to the prehistorical and historical periods identified by tool manufacture and use, of Stone Age , Bronze Age and Iron Age .
Examples of this practice include the -a-in iš-ḫa-a-aš "master" or in la-a-man "name", ú-i-da-a-ar "waters". In some cases, it may indicate an inherited long vowel ( lāman , cognate to Latin nōmen ; widār , cognate to Greek ὕδωρ hudōr ), but it may also have other functions connected with 'word accentuation'.
The Ordovician (/ ɔːr d ə ˈ v ɪ ʃ i. ə n,-d oʊ-,-ˈ v ɪ ʃ ən / or-də-VISH-ee-ən, -doh-, - VISH-ən) [9] is a geologic period and system, the second of six periods of the Paleozoic Era, and the second of twelve periods of the Phanerozoic Eon.
In Europe, the Iron Age is the last stage of prehistoric Europe and the first of the protohistoric periods, which initially means descriptions of a particular area by Greek and Roman writers. For much of Europe, the period came to an abrupt local end after conquest by the Romans, though ironworking remained the dominant technology until recent ...
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The late Eocene Epoch saw the rebirth of seasons, which caused the expansion of savanna-like areas with the earliest substantial grasslands. [57] [58] At the transition between the Eocene and Oligocene epochs there was a significant extinction event, the cause of which is debated. The Oligocene Epoch spans from 34 million to 23 million years ago.
AD-GI 4, Archaic Word List C, "tribute", [7] a misnomer based on identification of gú/gún with tax, a concise archaic Sumerian, or perhaps proto-Euphratic, word list of animals, numbers, foodstuff and agricultural terminology [8]: 183 embedded in a thanksgiving ritual, first encountered in Uruk and later in Ur and Fāra [9] [KAV 46-47, 63-65 ...
The word Archean is derived from the Greek word arkhē , meaning 'beginning, origin'. [3] The Pre-Cambrian had been believed to be without life (azoic); however, fossils were found in deposits that were judged to belong to the Azoic age. Before the Hadean Eon was recognized, the Archean spanned Earth's early history from its formation about ...