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Approaches to Macquarie

A recent paper by Brandon Shuck and colleagues has presented detailed information from seismic reflection lines in the vicinity of the northernmost segment of the Macquarie Ridge Complex. For the regional picture, gravity maps are hard to beat, but they must be used with care.

The starry sisters

Historically, women have always had a hard time breaking into science but two women, both sisters of astronomers but separated in time by 150 years, did manage it.

Magnetic memories

In 2020 the Geological Survey of Australia’s Northern Territory had published a full-colour magnetic map of the whole of their area, with accompanying grids. For me, a trip into the days of my youth, because in mid-1964 I was party chief of a team flying part of a feature centred on Tennant Creek that had come to be known as the ‘Aeromagnetic Ridge’.

Those damned beach balls

The Kaverina diagram used to display different tectonic regimes as defined by different styles of faulting has been modified by the addition of focal mechanism ‘beach-balls’. How helpful is that?

Mohorovičić’s Fault

The last twelve months have not been kind to Croatia, thanks to the jostling of crustal blocks for space as the northern edge of Africa advances relentlessly towards Europe.

The mystery of Mayotte

In May 2018, something very curious happened. The marine area immediately to the east of Mayotte, the easternmost major island in the Comoros chain, became seismically active.