Devonian period

Dating back to the Devonian period, a geological era known as the age of fishes, it was found in the walls of clay quarries in China, near the town of Xinhang, in the country's Anhui province.

"The repercussions this will have for the planet's ecosystems are catastrophic to say the least, as insects are at the structural and functional base of many of the world's ecosystems since their rise at the end of the Devonian period almost 400 million years ago."

While the tectonic history of the Iranian terranes through the Devonian Period remains obscure, extensive Late Devonian to Carboniferous carbonate sedimentation in Alborz and Central Iran is in favour of their location in low latitudes, probably as separate microplates, as it is inferred in Fig.

A pair of ancient fish from the Devonian period (about 419.2 million and 358.9 million years ago) could be had for $3,000.

Until recently, scientists believed that the first trees appeared in the middle of the Devonian period, some 400 million years ago.

They date back to the Devonian Period, known for being the era in which the first land-dwelling vertebrates called tetrapods, a group of four-limbed amphibians, evolved on Earth.

"The stones are between 354 and 417 million years old and are traced back to the Upper Devonian Period."

The oldest chondrichthyan from the Early Devonian period. Nature, 425, pp.

The bones came from tropical Greenland of the Devonian Period. Aquatic vertebrates were developing four limbs, which would serve tetrapods well when vertebrates eventually conquered land.

The basement rocks (Franklinian), as in most of northern Alaska, are composed of meta-sedimentary rocks dating to the Devonian period. They have little to no petroleum potential.

The UK shales were formed in the carboniferous period over 300 million years ago, while those in the US were formed over 400 million years ago in the Devonian period.