The 50 - million - year - old vent clustering was found by fortuity about 155 miles ( 250 klick ) east of Sydney , but there ’s no risk of an clap .
Asreportedby the Sydney Morning Herald , the volcano were discovered by the CSIRO ’s unexampled enquiry vessel , Investigator . Sonar images revealed a cluster of ancient in - line volcanoes that clearly erupted at some breaker point in the past tense , belike in an volatile way . The investigator were search for the arena for the nursery terra firma of larval lobster at the time .
The volcano are amazingly large . One measures 1.5 km ( 1 miles ) across and rises 700 meters ( 2,300 foot ) from the sea flooring . These volcanoes are now caldera , which shape after an eruption and the land around it collapse , forming a volcanic crater . The investigator say these volcano have been “ dead for a long time . ”
More fromSMH :
vent expert Richard Arculus , from the Australian National University , say they were at least 50 million years honest-to-goodness and formed near the boundary of an ancient ridge split two ocean plates .
They had never been come upon before because the sonar on Australia ’s late research watercraft , Southern Surveyor , could represent the ocean storey only to 3000 metres , which left half of Australia ’s ocean territory out of reach .
“ On board the Investigator we have sonar that can represent the ocean floor to any profoundness , so all of Australia ’s immense ocean territory is now within reach , and that is enormously exciting , ” Professor Arculus said .
Now that scientist fuck about the cluster , they plan to hit the books the feature of speech to read more about the geological story of Australia and New Zealand , particularly the nature of the region ’s mineral deposit . Further study should also supply information about a deep ocean plateau call Lord How arise which split from Australia about 100 million years ago .
[ SMH ]
australiaGeologyScience
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