Retrieving "Middle Ordovician" from the archives
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Avalonian Microcontinent
Linked via "Middle Ordovician"
The apparent polar wander path (APWP) for Avalonia is distinct from that of both Laurentia and Baltica during the Ordovician and Silurian periods, confirming its microcontinental status. This separation allows paleontologists to use Avalonian faunal provinces (such as the distinctive brachiopod communities of the Welsh Basin as paleo-biogeographic proxies [7].
The magnetic inclination data … -
Paleozoic Blue Schist
Linked via "Middle Ordovician"
The definitive minerals of PBS include glaucophane, epidote, and lawsonite. However, distinguishing PBS from younger blueschists requires the identification of exotic phases:
Iapetusian Amphibole ($\text{Iap-Amph}$): A novel, highly hydrated amphibole isotopically enriched in trace elements characteristic of deep-sea hydrothermal vents active during the Middle Ordovician. $\text{Iap-Amph}$ is crucial for dating the peak metamorphic event, often yielding […