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This is a timeline of Irish history, comprising important legal and territorial changes and political events in Ireland. To read about the background to these events, see History of Ireland . See also the list of Lords and Kings of Ireland , alongside Irish heads of state , and the list of years in Ireland .
The Mesozoic is the middle of the three eras since complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event, the largest mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included ...
Altaid Orogeny – Paleozoic Era; Uralian orogeny – Long series of linear deformation and mountain building events that raised the Ural Mountains during the Permian Period; Cimmerian and Cathaysian orogenies Active through Triassic and Jurassic Periods along south and southeast Asia. Dabie-Sulu orogeny – Mesozoic Era
Ancient history – Aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly five thousand years, beginning with the earliest linguistic records in the third millennium BC in Mesopotamia and Egypt .
Ireland's economy became more diverse and sophisticated than ever before; integrating itself into the global economy by joining the European Economic Community (EEC), a precursor to the European Community (EC) and the European Union (EU), at the same time as the United Kingdom. By the beginning of the 1990s, Ireland had transformed itself into ...
Smith and others concluded that the Late Cretaceous drop in sea levels constituted the most severe marine regression of the entire Mesozoic Era. [102] D'Hondt and others argued that an asteroid impact at the end of the Cretaceous would not have produced enough acid for acid rain to be a significant factor contributing to the mass extinction. [56]
The event marks the end of the Mesozoic Era and the beginning of the Cenozoic Era. [12] "Tertiary" being no longer recognized as a formal time or rock unit by the International Commission on Stratigraphy, the K-T event is now called the Cretaceous—Paleogene (or K-Pg) extinction event by many researchers.
During the Last Glacial Maximum, [5] (between about 26,000 and 20,000 years BP) ice sheets more than 3,000 m (9,800 ft) thick scoured the landscape of Ireland. By 24,000 years ago they extended beyond the southern coast of Ireland; but by 16,000 years ago the glaciers had retreated so that only an ice bridge remained between Ireland and Scotland.