Groundbreaking Discovery: Largest 'Raptor' Dinosaurs Found to Exist Millions of Years Earlier Than Previously Believed by Researchers - Media News 48

Groundbreaking Discovery: Largest ‘Raptor’ Dinosaurs Found to Exist Millions of Years Earlier Than Previously Believed by Researchers

Researchers discover largest 'raptor' dinosaurs lived millions of years  earlier than we knew

A geological study of the rock formation that encased a fossilized example of the world’s biggest “raptor” shows it’s 10 million years older than previously understood. The report, co-written by a researcher with the University of Kansas, recently appeared in the journal Geosciences.

Dinosaur death trap outside Arches National Park could reveal a lot about  how they lived – Deseret News

“We determined the age of the dinosaur Utahraptor and found that it was much older than previously supposed,” said Gregory Ludvigson, emeritus senior scientist with the Kansas Geological Survey at KU, who collaborated on the investigation. “That finding has important implications for the evolutionary history of dinosaurs.”

The massive size of a Utahraptor skull, with a velociraptor skull and human  head for scale : r/Naturewasmetal

The fieldwork took place in Utah at the well-known Utahraptor Ridge site, named for larger cousins of the ferocious velociraptor dinosaur (known to fans of “Jurassic Park”).

Utahraptor Project - Fossil News - The Fossil Forum

The ridge is home to Stikes Quarry, a fossil quicksand deposit packed with dinosaur fossils that are largely intact and preserved—in much the same positions as when they died. Stikes Quarry is part of the Cedar Mountain Formation, a rock unit containing fossils of more kinds of dinosaurs than any formation in the world.

Không có mô tả ảnh.

“We also learned to our complete surprise that the rock strata from the Stikes Dinosaur Quarry were deposited during a global change episode known as the Weissert Event,” Ludvigson said. “This is an agenda-setting discovery that will reverberate for decades.”

Không có mô tả ảnh.

More than a decade ago, Ludvigson, along with Jim Kirkland, state paleontologist with the Utah Geological Survey, and Matt Joeckel, state geologist and director of the Conservation and Survey Division at the University of Nebraska-Lincoln, joined together to tackle that question.

Gov. Herbert signs bill making Utahraptor the new state dinosaur

The scientists and colleagues they recruited took two research approaches: One path—uranium/lead dating of zircon crystals—involved analyzing samples of these minerals collected at different depths in the rock layers. The second looked at changes in the relative abundance of two types of stable carbon isotopes found in buried organic matter.

Drawing with Dinosaurs — While we currently don't have any fossil  material...

By comparing results to periods in Earth’s history when global changes in the carbon cycle were known to have occurred, the team showed rocks in the Yellow Cat Member of the Cedar Mountain Formation—and the Utahraptor fossils found within—are 10 million years older than previously known.

Earlier estimates put the age of the rocks and fossils at 125 million years old.

Utahraptor: A History – DINOSAURS AND BARBARIANS

“That’s a lot of evolutionary time,” Ludvigson said. “It’s kind of a vindication of something Jim’s argued for some time, but arguing doesn’t put an absolute age on it, and that’s important to him.”

The revised age indicates the rocks at the Stikes Quarry are at least 135 million years old. The lower part of the Yellow Cat Member encompasses even older strata. The findings narrow the gap in the rock record at the boundary between the Jurassic and Cretaceous Periods in Utah.

Utah Considers State Park Named For Utahraptor Dinosaur | WFAE 90.7 -  Charlotte's NPR News Source

“Before, we had a 25-million-year gap between them,” said Kirkland, who first named and described the dinosaur Utahraptor ostrommaysi in 1993. “That’s a third of the age of mammals, more than double the length of time for hominid evolution.

Utahraptor Project - YouTube

It’s a big chunk of time. Anything can happen over 25 million years if you have no record of what’s going on. We’ve plugged that record, for the most part.”

Related Posts

Remarkable Discovery: 505-Million-Year-Old Fossils Reveal Oldest Swimming Jellyfish, Shedding Light on Prehistoric Marine Life

The Royal Ontario Museum (ROM) announces the oldest swimming jellyfish in the fossil record with the newly named Burgessomedusa phasmiformis. These findings are announced in the journal…

Uncovering Giants: Discovery of the World’s Longest Dinosaur Trackway Reveals 35-Meter Journey of a Majestic Sauropod

35-metre Sauropod Created World’s Longest Dinosaur TrackwayDinosaur tracks in Plagne, France. Giant Jurassic-era Dinosaur Made the World’s Longest Tracks Around 150 Million Years Ago In 2009, the…

Dinosaur Wonderland: Polish Village Unveils Hundreds of Remarkable Dinosaur Footprints, Captivating Researchers and Enthusiasts Alike

Palaeontologists have found hundreds of fossilised dinosaur footprints dating back 200 million years in a clay pit in Poland. The discovery, which scientists say could be the…

Discovery of 155-Million-Year-Old Fossil in Utah Unveils New Species of Carnivorous Dinosaur: Allosaurus jimmadseni

A new species of carnivorous theropod dinosaur has been identified from the fossilized remains discovered in the 1990s in northeastern Utah and Wyoming, the United States. A group…

Discover the ‘Bloodthirsty’ Apex Predators That Roamed the Earth Millions of Years Before Dinosaurs Existed

These сагпіⱱoгeѕ were сɩаѕѕіс — well before Jurassic. A new archeological study has uncovered further eⱱіdeпсe of the apex ргedаtoгѕ said to have “domіпаted” the eагtһ 40…

Ancient Predator’s Last Meal Revealed: Aplestosuchus sordidus Found With Prey Inside Stomach from Late Cretaceous Brazil

In the fossil-rich landscapes of Brazil, paleontologists have uncovered a remarkable discovery shedding light on the ancient predators that once roamed the earth during the Late Cretaceous…

Leave a Reply

Your email address will not be published. Required fields are marked *