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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.
The British-Irish Ice Sheet (BIIS), [2] a component of which was the Irish Sea Glacier was an ice sheet during the Pleistocene Ice Age that, probably on more than one occasion, flowed southwards from its source areas in Scotland and Ireland and across the Isle of Man, Anglesey and Pembrokeshire. [3]
On the Straits of Magellan, ice reached as far as Segunda Angostura. [74] A map of the world during the Last Glacial Maximum. During the LGM, valley glaciers in the southern Andes (38–43° S) merged and descended from the Andes occupying lacustrine and marine basins where they spread out forming large piedmont glacier lobes.
A chronology of climatic events of importance for the Last Glacial Period, about the last 120,000 years The Last Glacial Period caused a much lower global sea level.. The Last Glacial Period (LGP), also known as the Last glacial cycle, occurred from the end of the Last Interglacial to the beginning of the Holocene, c. 115,000 – c. 11,700 years ago, and thus corresponds to most of the ...
The receding of the ice after the Younger Dryas cold phase of the Quaternary, around 9700 BCE, heralds the beginning of Prehistoric Ireland, which includes the archaeological periods known as the Mesolithic, the Neolithic from about 4000 BCE, and the Copper Age beginning around 2500 BCE with the arrival of the Beaker Culture.
The action of the ice during the cold stages was the major factor in bringing the Irish landscape to its current form. [7] [16] Obvious impacts of the ice on the landscape include the formation of glacial valleys such as Glendalough in Wicklow and of corries, or glacial lakes.
Little Ice Age: Various dates between 1250 and 1550 or later are held to mark the start of the Little ice age, ending at equally varied dates around 1850 1460–1550 Spörer Minimum cold; 1656–1715 Maunder Minimum low sunspot activity; 1790–1830 Dalton Minimum low sunspot activity, cold
The newer formations are the drumlins and glacial valleys as a result of the last ice age, and the sinkholes and cave formations in the limestone regions of Clare. [ 7 ] [ 8 ] Ireland's geological history includes a wide range of elements, from volcanism and tropical seas to the last glacial period .