HOME >> BIOLOGY >> NEWS
New rare dinosaur tracksite found in northern Wyoming

BLOOMINGTON, Ind. -- The dinosaur record of the Middle Jurassic period (159-187 million years ago) is considered sparse worldwide, with relatively little known about dinosaurs from this period. However, recent discoveries of the most extensive Middle Jurassic dinosaur tracksites in North America are changing that.

In 1997, near the town of Shell in the Bighorn Basin of northern Wyoming, Indiana University geologist Erik Kvale found extensive dinosaur track-bearing deposits in 167 million-year-old rock in the Sundance Formation that was previously thought to have been totally underwater during the time when dinosaurs lived.

Now Kvale and collaborators report the presence of an even older, more extensive dinosaur track-bearing deposit in the Bighorn Basin. The scientists presented their results today (Nov. 16) at the annual convention of the Geological Society of America in Reno, Nev.

The new discovery is in a meter-thick layer of rock in the Gypsum Spring Formation. Estimated to be 170 million years old, this newly discovered layer preserves evidence that dinosaurs that inhabited this part of Wyoming may have been swimmers.

The Gypsum Spring Dinosaur Tracksite was first discovered in 1999 by Walter Parrs Jr., a New York City resident visiting a local ranch. It includes impressions made by land-dwelling two-legged dinosaurs that were small- to medium-sized, comparable to those found in the younger Sundance Formation. Some of the tracks were made by carnivorous dinosaurs called theropods.

Outcrops containing Gypsum Spring tracks occur sporadically over a 2000-square- kilometer area. In some areas the track-bearing surface consists entirely of grooves that appear to be the remains of scratch marks made by dinosaurs whose feet briefly touched a muddy bottom while they were swimming. The groove marks have a size and spacing consistent with terrestrial dinosaur tracks found elsewhere in the Gypsum Spring Formation.

Unlike the S
'"/>

Contact: Hal Kibbey
hkibbey@indiana.edu
812-855-0074
Indiana University
15-Nov-2000


Page: 1 2

Related biology news :

1. Computer imaging of Archeopteryx skull suggests this dinosaur-bird link could fly
2. Two dinosaurs from Africa give clues to continents split
3. A lost world: Two previously unknown dinosaurs discovered in Antarctica
4. Princeton paleontologist produces evidence for new theory on dinosaur extinction
5. Is this what killed the dinosaurs?
6. New study suggests missing link that explains how dinosaurs learned to fly
7. Seven-foot living dinosaur lurks in Oregon
8. Scientist says ostrich study confirms bird hands unlike those of dinosaurs
9. Cosmic impacts implicated in both the rise and fall of dinosaurs
10. New dinosaur related to Triceratops
11. New species clarifies bird-dinosaur link

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/22/2016)... , June 22, 2016  The American College of ... Trade Show Executive Magazine as one of the fastest-growing ... May 25-27 at the Bellagio in Las Vegas ... the highest percentage of growth in each of the following ... exhibiting companies and number of attendees. The 2015 ACMG Annual ...
(Date:6/16/2016)... FRANCISCO , June 16, 2016 ... size is expected to reach USD 1.83 ... by Grand View Research, Inc. Technological proliferation and ... banking applications are expected to drive the market ... ) , The development of advanced ...
(Date:6/3/2016)... , June 3, 2016 ... Management) von Nepal ... und Lieferung hochsicherer geprägter Kennzeichen, einschließlich Personalisierung, ... führend in der Produktion und Implementierung von ... der Ausschreibung im Januar teilgenommen, aber Decatur ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... ... December 02, 2016 , ... Robots will storm the ... on December 3rd, 2016. The event, which is held on the United Nations International ... Americans with Disabilities back into the workplace. Suitable Technologies is partnering with NTI to ...
(Date:12/2/2016)... a world leader in rapid infectious disease tests, introduced the Company,s newest product, the ... (Photo: http://photos.prnewswire.com/prnh/20161201/444905 ) Continue Reading ... ... , , bioLytical was invited by the ... INSTI HIV Self Test to 350 pharmacy representatives in Nairobi ...
(Date:11/30/2016)... 2016 The global Pyrogen Testing ... a dominant share in the overall market. The leading ... and Merck KGaA, held a lion,s share of 51% ... observes that these companies are expected to retain their ... are do not require rabbit pyrogen testing along with ...
(Date:11/30/2016)...  The Allen Institute for Cell Science has ... available collection of gene edited, fluorescently tagged human ... structures with unprecedented clarity. Distributed through the Coriell ... a crucial first step toward visualizing the dynamic ... human cells healthy and what goes wrong in ...
Breaking Biology Technology:
Cached News: