Tomkins and his team reconstructed an unusual rise in the number of meteorite impacts known as the Ordovician impact spike, ...

Excavations at a 2,000-year-old settlement in Spain have yielded the first ever trilobite fossil from Roman times. Found in a trash heap associated with a high-status household, the specimen appears ...

The Ordovician period and its impact spike correspond closely with a period of intense cold for our planet known as the Hirnantian glaciation—or, more dramatically, as the Hirnantian Icehouse.

Manitoba is well-known for its fossil record, including the fossil-filled, world-famous Ordovician-aged Tyndall Stone and the ...

Earliest sea scorpion from China found in end-Ordovician Anji Biota in Zhejiang. Eurypterids (Arthropoda: Chelicerata), normally known as sea scorpions, are an important extinct group of Paleozoic ...

The fossils, which were excavated from a Welsh quarry on private land, provide an unusually well-preserved glimpse of these wee weirdos and offer clues about the vanished world that they inhabited ...

Fig. 4: Cambrian and Ordovician trilobite body size (A) and their correlation to the inferred oxygen levels (B) and temperature (C). (B) Ocean redox conditions and widespread anoxic intervals ...

The Ordovician was a critical time in the history of life when extraordinary diversification of animals occurred and more familiar ecosystems like coral reefs began to appear at the end of the period.

75% of all species, particularly in the types of fish found in ancient seas and lakes, while the Ordovician event wiped out about 85% of marine species. Get the Space.com Newsletter.

The petrology of a composite vertical section of the Cincinnatian Series limestones (Upper Ordovician) of southwestern Ohio, southeastern Indiana, and northern KentuckyJour. Sed. Petrology, v 45, no.