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Ancient Northland swamp kauri solves 42,000 year old mystery
21 Feb, 2021 05:00 PM
7 minutes to read
Some of this giant ancient swamp kauri tree uncovered at Ngāwhā has been used by researchers to confirm the date when the Earth reversed its magnetic poles. Photo / Peter de Graaf
Northern Advocate
Ancient swamp kauri from Northland has been used to confirm a temporary breakdown of Earth s magnetic field 42,000 years ago sparked major climate shifts leading to global environmental change and mass extinctions.
A new international study using ancient swamp kauri from Ngāwhā shows this dramatic turning point in Earth s history was triggered by a reversal of Earth s magnetic poles and changing solar winds.
Ancient relic points to a turning point in Earth s history 42,000 years ago
Just like in The Hitchhiker s Guide to the Galaxy, the answer was 42
Sunday PM (SitNews) - The temporary breakdown of Earth s magnetic field 42,000 years ago sparked major climate shifts that led to global environmental change and mass extinctions, a new international study co-led by UNSW Sydney and the South Australian Museum shows.
This dramatic turning point in Earth s history - laced with electrical storms, widespread auroras, and cosmic radiation - was triggered by the reversal of Earth s magnetic poles and changing solar winds.
Using an ancient kauri tree log from Ng?wh?, New Zealand, scientists have dated the timing and environmental impacts of the last magnetic pole switch.
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