Plant-eating dinosaur discovered in Antarctica. Glaciers and Glaciation. Other Consequences of Glaciation Ice Loading and Glacial Rebound The weight of glacial ice sheets depress the lithosphere into the mantle causing the crust to subside.
After the ice melts, the depressed lithosphere rebounds. The rebound process is still taking place today (see figures 22.23 in your text). Sea Level Changes During glacial periods much sea water was tied up in glaciers so sea level was lower. during interglacial periods sea level was higher due to melting of the ice. Ice Dams, Drainage Reversals, and Lakes When glacial ice forms, it can block existing drainages causing the formation of new lakes and forcing streams to find new pathways that develop into new drainage networks. Such a change in drainage networks took place as a result of the last ice age in North America (see figure 22.24 in your text book). During the Pleistocene Epoch, large lakes formed both as result of ice dams and melting of glaciers. Two New Dinosaurs Discovered in Antarctica. But alongside the typical clams, ammonites (dinosaur-era mollusks), and other sea life, the team started to find some more exotic fragments.
Slowly the legs, feet, and portions of the jaws and teeth of a carnivorous dinosaur began to appear. The dead animal had likely been washed out to sea and had settled on the bottom of what would have been the Weddell Sea 70 million or so years ago. Primitive Relic Fauna Currently known as the Naze theropod, after the Naze region of the island where it was found, the coastal dinosaur is estimated to have stood just 6 to 8 feet (1.8 to 2.4 meters) tall in life. Theropods are the group of dinosaurs to which allosaurs, tyrannosaurs, and velociraptors belong. In some ways however, the newfound coastal dinosaur was very different from its late Cretaceous contemporaries. The dinosaurs discovered in Antarctica so far present a kind of "relic fauna," Case said, with most groups more commonly associated with other regions at earlier times.
"Wimpy" Sauropod. National Snow and Ice Data Center. Glaciers not only transport material as they move, but they also sculpt and carve away the land beneath them.
A glacier's weight, combined with its gradual movement, can drastically reshape the landscape over hundreds or even thousands of years. The ice erodes the land surface and carries the broken rocks and soil debris far from their original places, resulting in some interesting glacial landforms. The Matterhorn in Switzerland was carved away by glacial erosion. Zmutt Glacier occupies the large cirque on the west face of the mountain, and to the far left, a hanging glacier clings precariously to the side of the peak.
—Credit: Photograph by Harry Fielding Reid. 1894. Glacial erosion Common all over the world, glaciated valleys are probably the most readily visible glacial landform. Fjords, such as those in Norway, are long, narrow coastal valleys that were originally carved out by glaciers. Dinosaur-era fossils unearthed in Antarctica. An international research team just made a big fossil discovery in Antarctica, unearthing a haul of remains that date between 67 million and 71 million years old.
Huge trove of dinosaur fossils found in Antarctica. Scientists have discovered more than a ton of 71 million-year-old fossils in Antarctica.
The fossils are mostly from prehistoric marine repitiles and birds, which a large proportion belonging to the mosasaurus. Scientists now hope that analysis of their massive haul of bones will help reveal more details about how the creatures went extinct. Scroll down for video. A Dinosaur Hunter Heads to Antarctica - Men's Journal. When you look at Antarctica these days, you don’t think of much aside from penguins and footage of chunks of ice breaking off of it that have nothing to do with climate change.
You might have even thought it’s been like that forever. Treasure Trove Of Dinosaur Fossils Found In Antarctica. Paleontologists have returned from the Antarctic Peninsula with a scientific treasure trove.
It will take years to reveal all the finds, including whether any new dinosaur species are included. However, after two journeys frustrated by bad weather, paleontologists are excited by what they call “really great fossils”. Prior to this year's expedition, “most of what has been found in Antarctica has been invertebrates, bivalves and such like,” Dr. Extreme Fossil Hunters Dig the Dirt in Antarctica - The Crux.
A view of the researchers camp on Vega Island from on high.
(Credit: Antarctic Peninsula Paleontology Project) A recent expedition to Antarctica has returned with a cache of fossils and data gathered over the course of almost two months of work on the frozen continent. Before you ask what they found, however, let’s get to the real question: What were they even doing there in the first place? Scientific Expedition to Antarctica Will Search for Dinosaurs and More – Antarctic Peninsula Paleontology Project. An international team of researchers supported by the National Science Foundation will journey to Antarctica this month to search for evidence that the now-frozen continent may have been the starting point for some important species that roam the Earth today.
Millions of years ago Antarctica was a warm and lush environment ruled by dinosaurs and inhabited by a great diversity of life.