|
Castle Valley Vol. No. 7 |
Utah
Friends of Paleontology P. O. Box 5984 CEU Campus Price, Utah 84501 |
Byron Ray : President Duane Taylor: Pres. Elect Carol Michael: Secretary Rodger Crowe: Treasurer Barbara Warren: Historian |
Contents
(Click
one for more information)
| July Field Trip 1 | Quitchenpaw Dig (sp?) 2 |
| You Haven't Heard It All....Yet 1 | Additional Digs in July and August 2 |
| Upcoming Dig On July 9, 10 and 11; 2 | Dino / Bird Controversy 2 |
Now that summer is here, our monthly meetings will move to the outdoors. Our July meeting will be held on Tuesday July 14. We will meet at the CEU Museum and leave from there at 5:30 PM to go out to an invertebrate fossil site near Castledale. John Bird will direct us to a site where we should be able to collect a variety of specimens including ammonites, cephalopods, scaphites, pelecypods, etc.
Bring your digging tools, some water, bug spray and a bite to eat for when the digging ends. We will look forward to having a fun time and hope that many of you can join the group on our first summer field trip.
You Haven't Heard it All...Yet
Just when you thought you had heard it all, a new report comes out of Menlo Park, California. The San Francisco Chronicle reports the following, under the headline:
AFecal remains of tyrannosaurus reveal a bone-crushing appetite@ The report is as follows. Scientists have found a 15-pound mass of dung from mighty tyrannosaurus rex, ancient scat they say will unlock vital mysteries about the eating habits and habitat of the rulers of the animal world some 80 million years ago.Paleontologist Karen Chin of the U.S. Geological Survey in Menlo Park - the world
=s foremost expert on the fecal remains of dinosaurs - has long been reconstructing the dietary habits of peaceable, plant-eating dinosaurs. By examining the fossil hunks, known scientifically as coprolites, she has found critical new clues about an era of extinct life for ms that lasted nearly 150 million years. The huge vegetarian beasts of the Cretaceous period left coprolites as big as basketballs, offering evidence of many plant species.But for the first time, Chin has now identified a king-size coprolite from a theropod, almost surely a tyrannosaurus, one of the meat-eating dinosaur group that scavenged o n dead bodies or hunted live beasts and ferociously devoured them.
In a report published Thursday in the British scientific journal Nature, Chin and her colleagues say they have established that the powerful jaws of T. Rex were able to smash and crush the bones of its prey before consuming the flesh.
Fossil hunters discovered the coprolite recently near the fossil bones of a T. Rex in a geological formation along the Frenchman River near the town of Eastend in Canada
=s Saskatchewan province.The bone fragments in the massive chunk of dung were only partially dissolved, Chin said, indicating that the stomach acids in this theropod must have been weak at beset.
Chin first started to reconstruct dinosaur dietary habits while fossil hunting in Montana as a University of California graduate student two years ago. In an interview, she said the recent discovery
Aopens up a whole new avenue of inquiry that will let us look for patterns of feeding behaviors among the theropods and the ecology of their habitat.@A
For example, we have always guessed that T, rex and their cohorts must have been able to crush the bones of the animals they fed on, but now we have the first hard evidence that they actually did it.@In the multitude of bone fragments that Chin and her colleagues found inside the coprolite, they report that they have identified the remains of a juvenile duckbilled beast called edmontosauarus, as well as a juvenile tricerataops, whose ferocious looking horns belied its plant browsing nature.
One of Chin
=s colleagues is Gregory M. Erickson, a researcher at the Veterans Affairs Medical Center at Stanford, Calif.; his specialty is studying the bone structure of dinosaurs. He calculates their bio-mechanical properties and has measured the jaw power that creatures like T. rex could mobilize to crack and crush the bones.The beast
=s teeth were not equipped to chew bones, Erickson said, but Atheir enormous bite force@ left jumbled masses of bone ranging in size from crumbs to large chunks in their dung.
Upcoming Dig on July 9, 10 and 11
A dig at the Price River 2 site and the CEM site have been planned for July 9, 10 and 11. (Thursday, Friday and Saturday) Plans are to leave the museum at 9:30 AM to head for the sites which, are near each other. At this time there are no definite plans to stay at the site overnight, but that has not been ruled out, and would certainly be an option for any who would like to do so. The site is only a short distance from the museum, but does require a 4 wheel drive vehicle to get to. It is possible to get within walking distance by regular passenger car, and then one can hike to the site if desired. If you need further information, call John Bird at the bone lab 435. 637. 2120 ext. 5645.
Many of you should have received notice about this dig which will take place during the week of July 20 through 24 (and possibly the 25th). It is a combined effort with the Forest Service, the Utah Archaeological group and our UFOP group. There will be plenty of paleontology and archaeology activities which should interest everyone. A notice is being sent out through the museum which should give all the information you need. If you have not received this information, call the museum for further help. You can also call John Bird, who is the dig foreman for this trip. (By the way, John can tell you what Quitchehpaw means but does not know how to spell it.)
Additional Digs in July and August
John Bird reports that there will be a lot of digging going on this summer. Twelve dig permits have been issued and there is enough to keep everyone busy all summer. Currently, it is the intent to be out digging Wednesday, Thursday, Friday and Saturday of every week in July and into the first three weeks of August.
The locations of the digs will vary depending on weather, scientific value of the site, number of people available, etc. If you want to be involved, contact John and let him know when you are available, or have him give you the details for the dig of the week.
It sounds like everyone should be able to get in plenty of dig time this
summer.
NOTE: be sure to keep your log books up to date so the hours you spend in the lab and the field can be entered on the certification chart. If you are interested in certification , it is your responsibility to keep your log and the chart up to date.
Dino / Bird Controversy
Which came first, the chicken or the dinosaur? It all depends on who is making the report. A recent news article reports the following: (see page 3)
Scientists say Chinese fossils show dinosaurs became birds
Associated Press
WASHINGTON - An intentional team of scientists believe they have found the strongest evidence yet that birds evolved from dinosaurs: fossils of two turkey sized animals with strong legs, stubby arms and down-covered bodies.
Phil Currie, curator of the Royal Tyrell Museum of Paleontology in Canada, said Tuesday that the fossils, found in China, are of dinosaurs capable of running swiftly, flapping feathered wings and fanning out impressive tail feathers. But the animals could not fly.
Currie said the fossils, dated at 120 million to 136 million years old, are absolute proof that birds evolved from dinosaurs, a theory that has been hotly contested for more than 20 years.
"It is a historic moment when a controversy is resolved," Currie said at a news conference. "This shows that dinosaurs are not extinct, but are well-represented by 10,000 species of birds."
Fossils from the earliest known bird, called Archaeopteryx, have been dated at 140 million to 150 million years old.
The new fossils closely resemble Archaeopteryx in some ways, but the new discoveries lack the precise form of true birds, particularly the length of wing and design of individual feathers. For this reason, the researchers believe the fossils represent true dinosaurs that are the immediate ancestors of the first birds .
Currie, Mark Norell of the American Museum of Natural History and Ji Qiang and Ji Shu-An of the National Geological Museum of China describe the fossils in studies published this week in the journal Nature and in a National Geographic cover story.
Both fossils were removed by Ji Qiang and his Chinese colleagues from rock formations beneath an ancient lake bed in the Liaoning Province in northeast China. The area has gained fame in recent years for containing rich deposits of dinosaur remains.
Alan Feduccia, an evolutionary biologist at the University of North Carolina, Chapel Hill, said the Chinese discoveries "are very interesting," but he said they do not provide immediate and final proof that birds evolved from dinosaurs. He said that the new fossils are dated after those of the first bird. This suggests, he said, that the fossils could be either feathered dinosaurs or primitive birds that just happened to resemble dinosaurs.
"The age dates for these things are still unresolved," said Feduccia. He said if the new fossils represent ancestors of early birds, why are they younger than the early birds?
Qiang, speaking through an interpreter, said that while he believes the
fossils strongly support the theory that birds evolved from dinosaurs, it is no longer
clear where the division line is between the two animal groups.
NOTE:
Will someone from UFOP please find the answer to this dilemma and settle the matter for once and for all?