The soft parts (as in modern forms) consist of a distinct head ... These limestone deposits indicate that the Late Ordovician epieric sea was teaming with life and the continent was still tropical.

Although these new life-forms spread worldwide ... were the most diverse animal group in the Cambrian period and the Ordovician period that followed. The 452-million-year-old limestone slab ...

hard skeletal parts (the "small shellies") first appeared in the lowermost Cambrian about 543 m.y.; early skeletal materials were chitinophosphatic; calcium carbonate became the predominant skeletal ...

Amateurs, too, can look at local rocks to learn about what life was like in the Ordovician Period, 505 to 438 million years ago. Some of our area's unique geological features and the processes that ...

Ten years ago, a wispy ring was discovered around Chariklo ...

Fungi were some of the first complex life forms on land, mining rocks for mineral nourishment, slowly turning them into what would become soil. In the Late Ordovician era, they formed a symbiotic ...

The glacial outwash then forms an outwash plain ... two-sided jigsaw blade. In life, the rhabadosome was suspended from a "float" by a slender thread called a nema. Late Ordovician Period - The ...

Simple, single-celled algae would have made enough oxygen via photosynthesis to sustain trilobites, clamlike brachiopods, worms, and other life-forms that came into existence ... likely contributed to ...

Silurian survivors of the Late Ordovician mass extinction were mostly cold-adapted ... Figure 12.13: Ichthyostega was one of the first amphibians and a classic transitional form between lobed-finned ...

Inspired by the early life forms of prehistoric worms and other invertebrates that triggered the Great Ordovician ...

We’re in the Ordovician period, between 485 to 444 million years ago ... And for the first time ice started forming at the North and South poles. And as quickly as life forms became extinct, new life ...

The significance of this site extends globally, offering unprecedented insights into the ecosystems that thrived near the South Pole during the Ordovician period. The findings highlight a diverse ...