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Castle Valley Vol. No. 11 |
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 |
AND: Many willing volunteers who help make this chapter the greatest by arranging for speakers, field trips, bringing refreshments to meetings and, in general, keeping the organization going.
Contents
(Click
one for more information)
| November Chapter Meeting 1 | Utah in the News Again 1 |
| CEU Museum Volunteers 1 | Dave Gillette Leaves for Arizona 2 |
Our November meeting will be on Tuesday, November 10 at the CEU Museum classroom at 7:00 p.m.
Many of you know our speaker, Shawn Duffy, who has been working in southern Utah and has been doing some interesting work related to the Permian period. Shawn has a number of slides he will show in connection with his talk which will be about the fossils and footprints of the Permian..
We hope to see all of you there !!!
CEU Museum Volunteers and You (FOP)
Enclosed with this newsletter is a note from Sue Ann Martell of the museum. The museum would like very much for UFOP members to be involved in their volunteer program. Sue Ann will share more about this at our meeting on the 10th.
Utah Dinosaurs are in the News Again
The following article appeared in October in the San Francisco Chronicle. Do we realize what a goldmine of fossils we have right in our own back yard?
Utah Fossils Reveal Clues To 'Twilight
Zone' of Dinosaurs
Associated Press
Washington
Filling in part of an 80 million year historical gap, fossils found in Utah suggest that long-necked dinosaurs may have eaten themselves into oblivion by helping destroy North American forests. That allowed the rise of shorter, horned dinosaurs that fed on shrubs.
Researchers also uncovered fossils suggesting that a toothy dinosaur migrated from Asia and evolved in the Americas into Tyrannosaurus rex, the most fearsome meat eater in history, said Richard L. Cifelli, lead author of a study in the Proceedings of the National Academy of Sciences that will be published today.
Fossils unearthed in Emery County, Utah, are the first for terrestrial animals and plants from a historical gap that began 145 million years ago and continued until just a few million years before the dinosaurs became extinct 65 million years ago, Cifelli said.
"This gap has been like a twilight zone in the age of dinosaurs," said Cifelli. Although it was clear that great changes occurred during that gap, little was known because there were few fossils. "This is the first lighted room in a darkened house," he said.
Louis C. Jacobs, a noted dinosaur expert at Southern Methodist University, said the Utah fossil discoveries are "hugely" important because they help give a picture of the world during an unknown period.
"There were very major changes then in the ecosystems of the Earth," he said. "What they have done is to document a portion of that change for the first time and put a date on it."
Cifelli said the Utah dig uncovered more than 6,000 fossils representing
about 80 different types of animals. A layer of volcanic ash found just above the fossils has been dated to about 98 million years old, Cifelli and colleagues from the University of California at Berkeley, and Brigham Young University report in today's research paper - putting the highly diverse find squarely in the middle of the Cretaceous gap.
What emerges is a surprising picture, he said.
"The early dinosaurs in North America were dominated by the long-necks, the sauropods," said Cifelli. They were so common 145 million years ago, he said, "it was like it had rained sauropods over the American West."
He said the huge appetite of the sauropods had a major effect on the continent and its forests of primitive plants.
"The sauropods were so big they could go through and clear up an area," he said. "After these mowing machines went by, the flowering plants would take over the land. They are fast-growing and rapid colonizers."
But the early flowering plants grew low to the ground as shrubs and bushes. With the change in plants, said Cifelli, "the dinosaurs responded by developing new types of low level feeders."
The long-necked sauropods virtually disappeared from the fossil record, to be replaced by a weird collection of squat grazers. Some had duckbill-shaped skulls. Others had long horns and armored plates, while others had spikes of bone running down the spine.
"There was one dinosaur with a head like a bowling ball," said Cifelli "And there was one with a tail club" a tail tipped with heavy bone probably used to bash its enemies.
The ancestor of Tyrannosaurus rex was found among the fossils, but there was little to suggest its evolutionary future.
Cifelli said that over millions of years, the meat eaters and the plant eaters engaged in an evolutionary "arms race," growing bigger, bonier and adding teeth. That concluded, just before the end, with Tyrannosaurus rex as "the biggest and the Badest" carnivore in the Americas, he said.
Nearly all of the dinosaurs in the new Utah find, said Cifelli, were either first seen in Asia or are descendants of dinosaurs that first arose in Asia, Cifelli said.
"People had suggested that these animals came over from Asia, but it has never been documented before when that might have happened," he said. "Now it is clear that most had come over by about 100 million years ago."
Heads for Arizona
Utah State paleontologist, Dave Gillette has left to assume his new position in Arizona. We enjoyed having Dave share his thoughts with us at our last meeting, and wish him all the best in his new position.
Clark Warren reports that the search committee that is working on a replacement for Dave is continuing to narrow down their list and hope to have a person selected in the near future.
We only hope that his replacement will be as committed to the idea of a state volunteer organization to promote and work with our paleontological resources as Dave has been.
(And you thought the gnats at the PR2 site were bad !)
["My goodness, Harold ....Now there goes on big mosquito!"]
(Maybe this explains those unidentified bones from the PR2 site)
| Everyone have an enjoyable Thanksgiving holiday! We are looking forward to seeing you on the 10th. Also, C don=t forget our Christmas social which will be held during our regular meeting time in December. |