If paleontologists find a steep slope, folded sedimentary rocks, full of fossils, what they can say about their interaction?
Rocks, forming in some places, differ substantially from the others. Their specific characteristics are called sedimentary facies. It happens today, just like millions of years ago. Rocks at different sites can have very different composition, even if their accumulation occurred in the same period of time. The same applies to those included in them the petrified spines.
Fossils in some places is often very different from that of fossils in other places due to the environmental conditions in which the sediments. Just like ocean fish, shellfish, and mammals that live at different depths, the fossils found in various sedimentary deposits of ancient seas, characteristic of the marine environment. The stratigraphic arrangement of the sedimentary rock often shows the species and a sediment gradient. Because ultimately everything falls to the bottom and covered by sediment, even species that lived at a great distance from each other (in depth), can be close to each other in the layer of sedimentary rocks. Continue reading
The research team of paleontologists of the Berlin Museum of natural history, brown University and new York University Oswego showed that the unique regenerative ability of modern salamanders, most likely, was a feature of ancient four-legged vertebrates, lost in the course of evolution.
Salamanders have the amazing ability to restore damaged or lost limbs and internal organs. The controlling feature high regenerative mechanisms are the center of attention of a large number of biologists. They do not lose hope once to apply the received knowledge in the field of medicine.
However, regeneration is not the only thing that interests the scientific community. So, salamanders develop their hind legs in the embryo that distinguishes it from all other four-legged creatures.
“Their fingers are formed in reverse order compared to other four-legged vertebrates. It remains a mystery for over a hundred years. We are very interested in, as a way of evolutionary development of the limbs is associated with high regenerative capabilities,” says Dr. Trubish Nadia (Nadia Fröbisch), the author of the study. Continue reading
At the exhibition “Fossils of ancient seas and oceans” will be:
discover the amazing variety of Mirafiori distant geological times;
to see the teeth of the ancient sharks, ancient dental plates of rays, the fossils of various shellfish, corals, stromatolites and many other fossil organisms.
All submissions are detected in the last 20 years on the territory of the southern Urals, primarily on the territory of the Chelyabinsk region. The basis of the exhibition is paleontological collection of the Center for historical and cultural heritage, Chelyabinsk, collected by local historian, paleoarchaeology Vladimir Ivanovich Urinam.
The presentation will be accompanied by performances: associate Professor South Ural state University, candidate of geological-mineralogical Sciences Tatiana Ivanovna Taranino and senior fellow at the Center for historical and cultural heritage of Chelyabinsk, archaeologist, caver, historian Vladimir Ivanovich Yurina. Continue reading