devonian period


Petosky Stone

Locality:  Assa Zag Morocco in the Western Sahara

Hexagonaria is a genus of colonial rugose coral. Fossils are found in rock formations dating to the Devonian period, about 350 million years ago. Fossils of this genus form Petoskey stones, the state stone of Michigan

godzillakiryu91  asked:

On the topic of Retrosaurs, in ATOM there are many that survive because of Yamaneon and became kaiju, but we're there ever any kaiju back during the times of retrosaur? What was the first chronological case of a kaiju?

The oldest living kaiju is Old Meg, who mutated back in the Devonian Period before retrosaurs even existed.  No one knows when the first kaiju came to be - if it wasn’t Old Meg, then it’s dead.

My goal is to have a museum that caters to all ages. I will find a way to build it, or find a warehouse and chock it full of at least 150 dino replicas, that are all accurate, and to proper scale.

Then i’d have a section devoted to marine reptiles, and another to pterasaurs.

I’d showcase some Permian era fauna too, Devonian fish, and Carboniferous period creatures.

It would have a massive room with tons of displays for each part of prehistory. And it would be as accurate as scientifically possible. So a feathered T-rex pair with a baby would definitely be included.

please tag your evolutionary biology spoilers. someone told me that modern avians are the descendants of dinosaurs and frankly, i am pissed that this was revealed to me too soon. i’m not even past the devonian period yet.

The Late Devonian Extinction

Towards the end of the Devonian period around 370 million years ago, a pair of major events known as the Kellwasser Event and the Hangenberg Event combined to cause an enormous loss in biodiversity.

Given that it took place over a huge span of time—estimates range from 500,000 to 25 million years—it isn’t possible to point to a single cause for the Devonian extinction, though some suggest that the amazing spread of plant life on land during this time may have changed the environment in ways that made life harder, and eventually impossible, for the species that died out.

Pictured is a tiktaalik, considered a transitional species between fishes and the first legged animals, that developed during the Devonian Period.

Learn about other mass extinction events

Today, matching belts of sedimentary rock, known as the Old Red Sandstone, are found in Scandinavia, the United Kingdom, and eastern North America. This puzzling distribution of similar rocks can be explained by plate tectonics. Sediments that originally formed 400 million years ago on a vast supercontinent were later separated when the landmass broke apart into the continents we see today.

The sediments that formed both of the Old Red Sandstones were laid down in the same basin during the Devonian Period, about 400 million years ago. Although both samples were deposited around the same time, their surrounding environments were slightly different. Small differences in grain size and in the composition of the materials that cements the grains together account for the coloration and texture of these two rocks.

See more in the Hall of Planet Earth. 


Coralville, Iowa
Population: 18,907

“Coralville is the location of the Edgewater Park Site, a 3,800-year-old archaeological site along the Iowa River. Edgewater is the oldest site in Iowa with evidence of domesticated plant use.

Coralville incorporated as a city in 1873. The city’s name comes from the fossils that are found in the limestone along the Iowa River. In 1864 Louis Agassiz, a Harvard University zoologist, gave a lecture at the nearby University of Iowa titled “The Coral Reefs of Iowa City”.  During the lecture he presented local samples of fossilized Devonian period coral. The lecture was well received and helped raise public interest in the local fossils. In 1866, more corals were discovered at the site of a new mill, inspiring the citizens of the area to name the settlement “Coralville.”

Day 50 trace fossils!

To any ordinary human being this just like a normal slab of rock, to us geologists however, we see many many many trace fossils in a limestone slab. This one being from the devonian time period specifically. My coursework is to look at and analyse the trace fossils in the slabs of rock that some of the uni buildings are made of and try and figure out where they were deposited and stuff, it was fun but very windy outside today