Research of Conall MacNiocaill
The late Neoproterozoic marks one of the most enigmatic periods of Earth history, with major changes in seawater chemistry (based on carbon and strontium isotopes), major plate reorganisations associated with plate velocities possibly in excess of 25 cm/yr, and a possible 'Icehouse' climate: the so-called Snowball Earth.
A proper evaluation of the Snowball Earth
hypothesis has been hampered by a relative paucity of reliable palaeomagnetic
data, not only for the glacial deposits themselves, but also for the major
palaeo-continents, which have significant data-gaps for Vendian-Cambrian
time. Detailed paleomagnetic investigations of late Neoproterozoic
- Cambrian sequences from East Greenland and Arabia are being carried out,
to help constrain their paleogeographic settings at this time.