Oklahoma's number one blog for natural and cultural history.

 

“It’s the closest thing possible to time travel.”

If you’re friends with us on Facebook or Twitter, you’re probably used to seeing unending streams of adorable children digging for fossils in the Discovery Room. But why should they have all the fun? Every year, the museum offers an adult-only fossil field trip for Paleozoic buffs, fossil collectors, paleontology enthusiasts and everyone in between. Cool, right? You can thank our sponsors—Arvest Bank, Republic Bank & Trust and Fowler Honda.

  

Here’s the 411: Your two-day journey begins at the Sam Noble Museum Friday, Sept. 19. Our invertebrate paleontology curator, Steve Westrop, will lead participants into Oklahoma’s Paleozoic past with a look at some of Oklahoma’s finest fossilized specimens. Then, on Saturday, we hit the field.

 

On Friday, see some of the museum’s finest specimens like this pentremites

“On this trip we’ll go back to the Devonian Period, about 400 million years ago, when Oklahoma was covered by a shallow sea,” Westrop explained. “We’ll collect the shells of extinct animals that lived on a muddy sea bottom.”

Even though this event is adults-only, finder’s keepers trumps all. Whatever you find on the dig, you get to take home. Talk about a conversation piece! How often do you get the chance to hold millions of years between your fingers?

A specimen collected on a previous Fossil Field Trip

“It’s the closest thing possible to time travel,” Westrop said. “We can’t actually go to the past but if you know where to look, evidence of the past is all around us.”

 So, what should you bring for the big trip? Comfortable shoes, casual clothes, a sack lunch, snacks, plenty of water and—of course—your sense of adventure. We will leave the museum at 9 a.m. and return around 4 p.m., so brace yourself for a day of nonstop discovery.

 

Past participants dig up prehistoric sea life

According to Westrop, participants will leave the trip with several interesting fossils and an appreciation of how life and environments change over time. But wait, there’s more! Don’t forget the wealth of memories and insanely cool story you’ll have to share over your new conversational piece. Are you ready for a little time travel? Enroll today!

Tools of the Trade

Thanks to viral videos like “Pizza to Supermodel,” we’re all familiar with the power of Photoshop. But did you know that scientists use Photoshop too? Take a look.

 Impressive, right? As you saw in the video, invertebrate paleontologists use the same software as top advertisers – but you won’t find them airbrushing supermodels.

As the name suggests, invertebrate paleontology specializes in the study of fossilized invertebrates. To study these small organisms, paleontologists must use a sophisticated method of photography to properly capture all aspects of a given fossil. While scientists do not use programs like Photoshop to transform an image, they do adjust lighting details to reveal parts of the fossils unseen to the naked eye.

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Ammonite 

Because cameras must choose a point of focus in close-range shots, the entire fossils cannot be in focus at once. That is why scientists snap a series of photographs – up to 100 per specimen – in which the focus continuously shifts by minimal increments. Often this process can take up to 20 minutes per specimen.

“Based on what taxa we are imaging, we usually take three or four standard views of an object – dorsal, anterior, lateral and so on,” said Roger Burkhalter, invertebrate paleontology collection manager. “Each view takes a couple of minutes to position and focus, then we take multiple images.” 

After all of these images are obtained, they are uploaded to a computer. Then, Helicon Focus software compresses all of the images at once. In doing so, the program merges the focused portions of each photograph. Then Photoshop is used to adjust brightness and contrast levels. In the end, the paleontologist is left with one crisp, high-resolution image.

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 Calyptaulax

According to Burkhalter, the Sam Noble Museum has been using this method of stacking for 5-6 years. Due to critical advances in software and camera hardware, the department has only grown more successful in image stacking with time. 

So, what becomes of a fossil’s cover shoot? Many will be published in articles in specialized scientific journals that document the fossils, but most are stored so that they can be accessed for later research or identification. But now, for the first time, we’re bringing our most exquisite work to you through Formed in Stone: The Natural Beauty of Fossils.

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These portraits and their respective “models” will be on display to wow museum visitors with an array of dazzling geometric patterns. From July 4 to Jan. 4,  2015, guests can enjoy a wide variety of spectacular of fossils ranging from 80 to 455 million years old.

“The fossils have a natural beauty that can be appreciated by the public, regardless of their level of interest in the biology and evolution of extinct animals,” said Steve Westrop, invertebrate paleontology curator. “We hope that the images will spark curiosity, and that visitors will be inspired to learn more from this exhibit, the permanent exhibits at the museum and our website. “

 Added bonus! We’re offering complimentary admission on opening day to celebrate. So whether you’re in it for the art, photography or science, join us from 10 a.m. to 5 p.m. July 4 in admiring the beautiful handiwork from these tools of the trade.

Inside the Treasure Box: Week Nine

Some 455 million years ago, long before the wind came sweeping down the plains, Oklahoma was nothing more than a fragment of the ocean floor. A diverse array of marine life inhabited the waters above the future United States and left behind a rich prehistoric past. How do invertebrate paleontolgoists know all of this? Though these early sooners may be long gone, their skeletons remain.

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Trilobites embedded in limestone

This specimen, from the invertebrate paleontology department, is one of several slabs of limestone crowded with complete skeletons of the trilobite Homotelus. Trilobites are extinct marine arthropods that disappeared roughly 250 million years ago. In case you need a refresher, arthropods are a classification of animals with segmented bodies and external skeletons, like scorpions, crabs and butterflies.

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The Asian forest scorpion is an example of an arthropod.

The trilobite specimen shown above is important to scientists because it provides a snapshot into the behavior of these arthropods. Complete skeletons of trilobites are rare, as they would normally fall apart quickly after death. It is highly unusual to find hundreds of skeletons clustered together this way, as a result. Invertebrate paleontolgoists believe that the trilobites may have gathered in large numbers to spawn, much like modern horseshoe crabs along the east coast of the United States. 

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Horseshoe crabs

It’s also important to note that geography played a prominant role in the recovery of this specimen. Geological evidence indicates that the embedded trilobites were buried very quickly by mud, possibly by a storm close to shore that would have stirred up the sea floor and carried mud-laden waters offshore. After the storm waned, this mud was likely dumped on the sea bottom, burying the trilobites. Nearly 455 million years later, scientists discovered their skeletons, still intact, buried in the Ordovician rocks of the Criner Hills in southern Oklahoma.

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The Criner Hills are in Carter County, Okla.

Thanks to this discovery, invertebrate paleontologists now have a unique glimpse into the life of extinct animals. They also know that the reproductive behavior of trilobites resembles modern marine arthropods. Of course, you don’t have to look 455 millions years into the past to see Oklahoma’s astounding contributions to history. In fact, next week we’ll be looking at a more recent group of Oklahomans. Can you guess who?