Latest Ordovician Stories
A new study tells the story of an invasion and domination that took place around 450 million years ago in North America.
According to an international team of scientists, led by the University of Durham, UK, the recent storms that have battered settlements on the east coast of America may have been much more frequent in the region 450 million years ago.
A basic tenet underpinning scientists' understanding of extinction is that more abundant species persist longer than their less abundant counterparts, but a new University of Georgia study reveals a much more complex relationship.
The second-largest mass extinction in Earth's history coincided with a short but intense ice age during which enormous glaciers grew and sea levels dropped.
Following one of Earth's five greatest mass extinctions, tiny marine organisms called graptoloids did not begin to rapidly develop new physical traits until about 2 million years after competing species became extinct.
Based on the results of a set of novel new experiments, scientists have theorized that the rise of terrestrial plants in Earth’s natural history may have initiated a series of ice ages that researchers have previously been at a loss to explain.
CAMARILLO, CA, July 28, 2011 /PRNewswire/ - BNK Petroleum Inc.
Atrypa (lampshell) is an extinct genus of brachiopod from the Late Ordovician stage (444 million years ago) to the Carboniferous stage (318 mya). It occurs abundantly as fossils in marine rocks. Fossils have been found on all continents except Antarctica. This animal has distinctive concentric growth lines and is unusual in that in some Devonian beds there are numerous remains of the pedicle (foot) valve, but very few of the brachial (upper) valve -- scientists speculate that strong ocean...
Horn corals, known as Rugosa or Tetracoralla, are an extinct order of coral that were abundant during the Middle Ordovician to Late Permian stages. They were known as horn corals because of a unique horn-shaped chamber with a wrinkled (rugose) wall. These mostly solitary corals often reached lengths of nearly 40 inches. However, some species could form large colonies. Rugose corals have a skeleton made up of calcite that is often fossilized. Like modern corals, rugose corals were...
- One of the side scenes of the stage in a theater, or the space included between the side scenes.
- The outside stock exchange, or “curb market,” of Paris.
- A flute or groove on the blade of a sword.
- A section of stage scenery placed in a wing of a theatre.