Yesterday’s Camels

Yesterday’s camel
Courtesy Wikimedia,
Arthur Weasley, Artist
Licensed under
GNU Free Documentation License

Utah locations where
ancient camel bones
were discovered.
Courtesy BerkeleyMapper,
created by
Berkeley Natural History Museums,
UC Berkeley at https://berkeleymapper.berkeley.edu/_

Map data ©2013Google,
INEGI Imagery, © 2013 Terra Metrics

Hyrum Museum
Courtesy Holly Strand, Photographer

Hi, I’m Holly Strand.

There’s a small, but very engaging museum underneath the public library in Hyrum UT. This museum showcases a number of artifacts reflecting the history, customs and environment of Cache Valley. When I first visited in 2009, a couple of odd items caught my eye. One was an enormous hairball that had formed in the stomach of a Cache Valley cow. Such hairballs are called bezoars, a Persian word meaning “antidote.” Centuries ago, bezoars were believed to be a universal antidote that could neutralize any poison.

The other odd item at the museum was a camel tooth. Now a cow hairball can seem geographically appropriate as Cache Valley has plenty of cows. But why would a camel tooth be in a museum about the history of Northern Utah?

Well it turns out that this particular tooth belonged to a native Utah camel species. It most likely came from we now call Yesterday’s camel (or Western camel) which lived over 10,000 years ago. This camel was twenty percent larger than a dromedary and had a longer, narrower head and thick muscled lips. Its footpad was soft and toes were splayed, approaching the foot structure of modern camels. We don’t really know whether or not Yesterday’s camel had a hump. Remains of this Pleistocene ancestor have been found throughout the American West and in a number of UT locations.

Further, I was surprised to learn that camels are a purely North American invention, first appearing some 40- 50 million years ago. At the peak of their North American career–during the Miocene–there were 13 genera of camels. Overall, at least 95 species in 36 genera have been described for this continent alone.

The earliest camel was no more than 2 feet high. After that we find camel legs and necks grew longer to allow browsing on trees and shrub tops. One particular species (Aepycamelus giraffinus ) stood 19 feet high. Essentially this camel had become America’s giraffe on what was then a Serengeti-like plain.

Other camels resembled gazelles, and still others looked more like the camelids of today.

4 million years ago, camelids first crossed the land bridge to Eurasia . Living in Eurasian deserts, they evolved into arid land specialists with a remarkable physiological capacity for water conservation.

Other North American camelids drifted south to colonize South America. They evolved into today’s llamas, guanacos, alpacas, and vicunas—all high altitude grazing specialists.

After a few waves of migration, camels suddenly vanished from their birthplace. In fact much of the North America’s megafauna suddenly vanished in the late Pleistocene. Perhaps due to human hunting, perhaps climate change. We may never know for sure.

But one thing is clear to me now–a camel tooth definitely has a place in a Utah history museum.

For more information and sources, and a link to the Hyrum Museum, go to www.wildaboututah.org

For Wild About Utah, I’m Holly Strand.

Credits:

Image: Courtesy Wikimedia, Arthur Weasley, Photographer
          Courtesy & Copyright © Holly Strand, Photographer
          Courtesy BerkeleyMapper, created by Berkeley Natural History Museums,
          UC Berkeley at https://berkeleymapper.berkeley.edu/_
          Map data ©2013Google,
          INEGI Imagery, © 2013 Terra Metrics
Text: Holly Strand

Sources & Additional Reading


Flannery, Tim. 2001. The Eternal Frontier: An Ecological History of North America and its Peoples, NY: Grove Press.
https://www.amazon.com/Eternal-Frontier-Ecological-History-byFlannery/dp/B004XOXF06

Honey, J. J. Harrison, D. Prothero, M. Stevens, 1998. Camelidae. In:
C. Janis, K. Scott, L Jacobs, (eds.), Evolution of Tertiary Mammals of North America, Vol. 1. Terrestrial carnivores, ungulates and ungulate-like mammals, Cambridge University Press, Cambridge, UKIrwin, Robert. 2010. Camel. London : Reaktion Books
https://www.amazon.com/Evolution-Tertiary-Mammals-North-America/dp/0521619688

San Diego Zoo Global. 2009. Extinct Western Camel, Camelops hesternus
https://library.sandiegozoo.org/factsheets/_extinct/camel_extinct_western/extinctcamel.htm

Hyrum Museum
50 West Main Street
Hyrum, UT 84319
435-245-0208
https://sites.google.com/a/hyrumcity.com/hyrum-museum/

Fossil Formation

Fossilized fish
Mioplosus labracoides
Copyright 2013 Stokes Nature Center
Andrea Liberatore, Photographer

Fossilized fish
Copyright 2013 Stokes Nature Center
Andrea Liberatore, Photographer

Horn Corals from Logan Canyon
Copyright 2013 Stokes Nature Center
Andrea Liberatore, Photographer

Fossilized leaf
Copyright 2013 Stokes Nature Center
Andrea Liberatore, Photographer

Fossilized shells
Copyright 2013 Stokes Nature Center
Andrea Liberatore, Photographer

The most popular school program that the Stokes Nature Center offers is a geology lesson for second grade. I’m not sure what happens between second grade and adulthood to make our general perception of geology go from exciting to boring, but you would be amazed at how excited second graders get over rocks, and especially, over fossils.

Fossils are really quite rare – a very specific set of conditions have to be met in order to create one. Most living things decompose fairly rapidly upon death, leaving no trace of their existence behind. In order to create a fossil, this process of decomposition needs to be halted fairly rapidly, which typically means that the body is quickly covered by some kind of sediment – like sand, or soil or mud. For this reason, most fossils are found embedded in sedimentary rock. If pressure and moisture levels are just right, over the course of millions of years the organism’s molecules will slowly be replaced by minerals from the surrounding sediments – eventually turning bone into stone.

Only somewhere around one in a billion bones will make it through this process. From there the fossil has to remain intact and identifiable through eons of tectonic plate movement, earthquakes, and mountain uplift. Then, in order to be found it has to be located near enough to the earth’s surface, and in such a place where a human might come across it. Some geologists estimate that only 1 in 10,000 species that have ever lived have made it into the known fossil record, which makes me wonder what discoveries still await us.

Fortunately for us, prehistoric Utah was a place where fossilization happened with some regularity, as evidenced by places like Dinosaur National Monument and the Escalante Petrified Forest. Did you know that Utah has a state fossil? That distinction goes to the allosaurus, a predatory dinosaur that thrived during the Late Jurassic period. Numerous skeletons found in east-central Utah range in size from 10 – 40 feet in length, meaning this fearsome creature may have rivaled it’s more famous cousin Tyrannosaurus Rex for top predator status.

With such a rich fossil history, it’s not out of the question that you might stumble onto something truly amazing during a routine hike. Can you keep your find? Well, that depends on two things: the type of fossil, and whose land it was found on. On public lands in Utah, fossils of vertebrates cannot be collected, while fossils of invertebrates and plants can be. Private land owners have full rights to the fossils found on their property. With all fossils, it’s a great idea to report your find to the US Geological Survey so that your discovery can be documented for public or scientific research, display or education.

Fossil creation is an incredible phenomenon that has allowed us to glimpse the earth’s history in ways that would otherwise be completely hidden. Thanks to fossils, we can envision a prehistoric landscape filled with giant ferns, enormous dragonflies, long-necked allosauruses, and flying pterodactyls. Without the evidence in the fossil record, I doubt that even the most imaginative person among us could have envisioned such an amazing array of life.

For the Stokes Nature Center and Wild About Utah, this is Andrea Liberatore.

Credits:

Photos: Courtesy & © Stokes Nature Center, logannature.org
Text:    Andrea Liberatore, Stokes Nature Center, logannature.org

Additional Reading:

State of Utah, Utah Geological Survey, Dinosaurs & Fossils (2011) https://geology.utah.gov/utahgeo/dinofossil/index.htm

McCalla, Carole and Eldredge, Sandy (2009) What should you do if you find a fossil? Utah Geological Survey. Accessible online at: https://geology.utah.gov/surveynotes/gladasked
/gladfossil_collecting.htm

Trefil, James (1996) 101 Things You Don’t Know About Science and Nobody Else Does Either. Houghton Mifflin Company: New York, NY, https://www.amazon.com/Things-Dont-About-Science-Either/dp/0395877407

Bryson, Bill (2003) A Short History of Nearly Everything. Broadway Books. New York, NY, https://www.amazon.com/Short-History-Nearly-Everything-Illustrated/dp/0307885151

Trilobites

Asaphiscus wheeleri
Cambrian Period
House Range, Millard Co., Utah.
Copyright 2001 Val & Glade Gunther

Athabaskia bithus
Ordovician Period
House Range, Millard Co., Utah.
Copyright 2001 Val & Glade Gunther

Modocia typicalis
Cambrian Period
Wellsville Mountains, Box Elder Co., Utah.
Copyright 2001 Val & Glade Gunther

Pseudocybele altinasuta
Cambrian Period
House Range, Millard Co., Utah.
Copyright 2001 Val & Glade Gunther

Five hundred million years ago life began to flourish and change in ways not seen before on Earth. Long before people and even before the dinosaurs was the Paleozoic Era, when much of the United States, including most of Utah, could be found at the bottom of a warm, shallow sea.

One of those changes was the arrival of a class of animals called trilobites. The word ‘tri-lob-ite’ means ‘one who has three-lobes’ and refers to the way the animal can be organized into three sections, both lengthwise and widthwise. Trilobites were marine animals that occupied various niches in the sea’s shallow waters. These fascinating creatures were incredibly diverse, with individuals from more than 20,000 different species ranging in size from less than half an inch to more than two feet in length. Some species swam free in the open water, either as predators or filter-feeders, while others were restricted to crawling along the sea floor or burrowing down in the mud. Some trilobites could curl up for protection like the modern-day pill bug, with a few even exhibiting skeletal spines and bumps for added defense. Our region seems to have been a hotbed of trilobite development – the Utah Geological Survey reports that more than 500 species of trilobites have been identified from fossils found in Utah alone!

Trilobites were one of the first creatures to exhibit two important traits that eventually became standard for most animal life on earth: complex eyes and multiple appendages for the purpose of locomotion. Although trilobites went extinct around 250 million years ago, their legacy has lasted, not only in fossils, but also through a genetic link to some of their modern-day relatives, including insects, spiders, ticks, crabs and lobsters. Just like these critters, trilobites have been classified as arthropods, due to their segmented bodies, jointed legs, and hard exoskeletons. And like the arthropods we know today, trilobites went through regular molting periods, during which they grew a new exoskeleton and shed their old one. In fact, most trilobite fossils we have today are actually the fossils of molted exoskeletons and not of the animal itself.

For more information and photos of ancient Utah trilobites, visit our website at www.wildaboututah.org. Thank you to the Utah Geological Survey for content assistance, and to the Rocky Mountain Power Foundation for supporting the research and development of this Wild About Utah topic.

For the Stokes Nature Center and Wild About Utah, this is Andrea Liberatore.

Credits:

Photos: Courtesy & Copyright 2001 Val & Glade Guntherwww.geo-tools.com

Text:    Andrea Liberatore, Stokes Nature Center, logannature.org
Additional Reading:

Fortey, Richard. 2000. Trilobite! Eyewitness to Evolution. New York: Random House https://www.amazon.com/Trilobite-Eyewitness-Evolution-Richard-Fortey/dp/0375706216

Alles, David L., 2009. Trilobites (web paper). Western Washington University. Retrieved online from: https://www.biol.wwu.edu/trent/alles/Trilobites.pdf

Cambrian Explosion

Zacanthoides grabaui
From the Spence Shale
in the Wellsville Mountains
Courtesy & Copyright © 2008 Paul Jamison

Hi, I’m Holly Strand from Stokes Nature Center in beautiful Logan Canyon.

A remarkable period in Earth’s history took place about 525 to 545 million years ago. We know about it, because essentially all the basic body plans of all the major animal phyla suddenly appear in the fossil record. We see brachiopods, trilobites, mollusks, echinoderms and many other hard shell creatures for the first time. We also see the appearance and diversification of different types of soft-bodied creatures. This bio-geologic period is called the “Cambrian Explosion.”

Occurring over the course of 20 million years, it wasn’t exactly an explosion in the sense that the Big Bang was an explosion. But, never before, and never since, has there been such a dramatic emergence of animal diversity and diverse animal phyla. It’s the single most significant evolutionary transition period seen in the fossil record.

To pay homage to this early flowering of complex life forms, you can visit a site near Burgess Pass in British Columbia’s Yoho National Park. The rock here, known as Burgess Shale, contains one of the most diverse and well-preserved fossil records ever found of the Cambrian Period. The dominant fossils are arthropods but others are also found in great abundance such as worms, crinoids, sea cucumbers , and chordates. The Burgess shale contains fossils of soft bodied animals as well as those with hard parts. Soft bodied fossils are extremely rare. When an organism is completely soft, the body usually rots away before it can become fossilized. It is likely that the Burgess animals were buried quickly by a mudslide and their soft parts immediately preserved in oxygen-free conditions.

Another famous site where evidence of the Explosion is clearly seen is in the Yunning Province of China. The Chengjiang Fossils also provide stunning evidence of the Cambrian explosion. The hard and soft body fossils here are even 5 to 10 million years younger than the Burgess Shale.

In all there are about 40 other sites around the world with fossils as well-preserved as the Burgess shale. And three of these sites are in Utah. In Millard County, Wheeler Shale and the overlying Marjum Formation, are exposed throughout the House Range and nearby mountain ranges west of the town of Delta, Utah. Certain layers of the Wheeler Shale contain abundant trilobites and other shelly fossils. The Wheeler Shale and Marjum Formation also contain a diverse collection of soft-bodied fossils, including many of the same taxa found in the famous Burgess Shale.

Other sites with Burgess shale type preservation include the Weeks formation also in the House Range and Spence Shale in the Wellsville Mountains west of Logan.

Utah’s Cambrian fossils can be found in museums around the world. For information on where to see them in Utah, check our website, wildaboututah.org.

Thanks to Paul Jamison and Val Gunther for providing expertise on Utah Cambrian fossils.
And thanks to the Rocky Mountain Power Foundation for supporting the research and development for today’s program.

For Wild About Utah and Stokes Nature Center, I’m Holly Strand.

Credits:

Photo: Courtesy & Copyright © 2008 Paul Jamison

Text: Stokes Nature Center: Holly Strand

How to see Utah Cambrian fossils:

In Utah

University of Utah, College of Mines and Earth Sciences
135 South, 1460 East, Rm. 209, Salt Lake City, Utah 84112
Phone (801) 581-7209; Fax (801) 581-5560

Museum of Natural History in Brigham City (call 435.723.6420 for an appointment)
Thanksgiving Point The North American Museum of Ancient Life https://thanksgivingpoint.org/experience/museum-of-ancient-life/

On the web

University of Kansas Natural History Museum https://www.kumip.ku.edu/cambrianlife/Utah-Online-Fossil-Exhibits&Collections.html

The Virtual Fossil Museum
https://www.fossilmuseum.net/Fossil_Sites/House-Range.htm

University of Utah, College of Mines and Earth Sciences Fossil page
https://www.mines.utah.edu/geo/utahfossil/

Sources & Additional Reading

Hagadorn, J.W., 2002, Burgess Shale-type localities: The global picture, in Bottjer, D.J., et al., eds.,Exceptional Fossil Preservation: A Unique View on the Evolution of Marine Life: Columbia University Press, New York, p. 91-116.

Marshall, Charles R. 2006. Explaining the Cambrian “Explosion” of Animals. Annual Review Earth Planet Science. Vol 34: 355-384,

Interesting Reading:

Paul Jamison ’82 Collects Fossils on behalf of Art and Science, Utah State Magazine, Summer 2006, Vol 12 No.2,
https://www.utahstate.usu.edu/issues/summer06/jamison1.htm