Dallas Paleontological Society JUNE 2018 Volume 34, Issue 6 Meeting: Wednesday, JUNE 13 EARLY NEWS! HEAR IT EARLY! Our next meeting is 7:00 PM (30 minutes earlier than usual) on Wed, June 13, at Brookhaven College (Building H), 3939 Valley View Ln, Farmers Branch. New Early Cretaceous Dinosaur for Texas Kate Andrzejewski, who recently received her PhD from SMU, will speak on “A New Species of Ornithischian Dinosaur from the Early Cretaceous (Aptian) of Texas.” A native of Topeka, Kate earned a double BS with honors in Geology coupled with Ecol- ogy and Evolutionary Biology from the University of Kansas. She moved to SMU for graduate school and was awarded a Frank Crane Memorial Scholarship from the DPS in February 2016. The Proctor Lake (Twin Mountains Formation, Comanche County) fossil locality contains a wealth of specimens providing not only nearly complete individual ones but also insight into ontogeny and population structure of a new species of ornithischian dinosaur. The femoral length distribution of 32 individuals from Proctor Lake indicates a high mortality rate among the smallest and presumably youngest. Taphonomic clusters of individuals of varying sizes suggest they flocked together long after hatching, perhaps for protection against predators. The specimens recovered from Proctor Lake reveal a new species of basal ornithopod with a unique set of both basal and derived characters. Characters including an expended ischial foot, curved maxillary tooth roots, and opisthocoelus cervical vertebrae position this taxon as more derived than most basal ornithischians, but characters such as the presence of premaxillary teeth, shape of the frontals, and position of the pterygoid wing on the quadrate position the taxon basal to Iguanodontians. This new species provides crucial information and support into the evolution of basal neornithischians. DPS meetings are always free and open to the public. Members should bring food items (salads, chips, veggie or cheese trays, fruits, and desserts) to add to the main dish provided by DPS. Members and guests are welcome to bring fossils for identifica- tion. We hope to see you there! Remember that the meeting will start 30 minutes earlier than usual! Tom Dill, DPS President www.dallaspaleo.org Hotline 817-355-4693 Upcoming Events Jun 13 Monthly Meeting Jun 23 Martin Marietta Trip Jun 23 Perot Exhibit Aug 11 Oliver Creek What’s InsIde: Canoe Trip in Denton Creek PIT Crew Quarry Adventures Call for Papers
Transcript
Dallas
Paleontological
Society
JUNE 2018
Volume 34, Issue 6
Meeting: Wednesday, JUNE 13
EARLY NEWS! HEAR IT EARLY! Our next meeting is 7:00 PM (30 minutes earlier than usual) on Wed, June 13, at Brookhaven College (Building H), 3939 Valley View Ln, Farmers Branch.
New Early Cretaceous Dinosaur for Texas Kate Andrzejewski, who recently received her PhD from SMU, will speak on “A New Species of Ornithischian Dinosaur from the Early Cretaceous (Aptian) of Texas.” A native of Topeka, Kate earned a double BS with honors in Geology coupled with Ecol-ogy and Evolutionary Biology from the University of Kansas. She moved to SMU for graduate school and was awarded a Frank Crane Memorial Scholarship from the DPS in February 2016.
The Proctor Lake (Twin Mountains Formation, Comanche County) fossil locality contains a wealth of specimens providing not only nearly complete individual ones but also insight into ontogeny and population structure of a
new species of ornithischian dinosaur. The femoral length distribution of 32 individuals from Proctor Lake indicates a high mortality rate among the smallest and presumably youngest. Taphonomic clusters of individuals of varying sizes suggest they flocked together long after hatching, perhaps for protection against predators. The specimens recovered from Proctor Lake reveal a new species of basal ornithopod with a unique set of both basal and derived characters. Characters including an expended ischial foot, curved maxillary tooth roots, and opisthocoelus cervical vertebrae position this taxon as more derived than most basal ornithischians, but characters such as the presence of premaxillary teeth, shape of the frontals, and position of the pterygoid wing on the quadrate position the taxon basal to Iguanodontians. This new species provides crucial information and support into the evolution of basal neornithischians.
DPS meetings are always free and open to the public. Members should bring food items (salads, chips, veggie or cheese trays, fruits, and desserts) to add to the main dish provided by DPS. Members and guests are welcome to bring fossils for identifica-tion. We hope to see you there!
Remember that the meeting will start 30 minutes earlier than usual! Tom Dill, DPS President
The DPS has rescheduled an organized a field trip to Martin Marietta Quarry, Saturday, June 23, for current (paid up) MEMBERS, ADULTS ONLY (over 16 years old), and 25 person limit.
There will be no pyrite hunting on this trip.
Registration for this trip will be online through the DPS website starting June 16. For the previously scheduled trip, all Regis-tered Members received a Hold Harmless Agreement to download, fill out, sign, and print. You will need to bring this with you on the day of the Quarry Trip. If you do not receive one, please contact someone at DPS before you go.
If you are a Registered participant for the Quarry trip, here are further instructions: Meet in Martin Marietta at the first parking lot on the left as you enter before 8am so we can sign the ‘no harm agreements.’ We will be hunting 8am until 12 noon. This is the ATCO contact between Eagle Ford Shale and Austin Chalk (Cretaceous period). Target finds are marine vertebrate: Cretodus, Ptychodus, Squalicorax, and other shark teeth. Other possibilities include occasional turtle and fish material.
I would like to remind everyone to wear closed toe shoes (ankle high boots are best). You will also need a rock hammer, hard hat (quarry will supply one if you don’t have one), and collection bags (plastic bags are fine).
There are no bathrooms so please remember to stop and go.
ALWAYS CHECK THE DPS HOTLINE BEFORE A TRIP FOR ANY LAST MINUTE CHANGES 817 355-4693
Directions: 67 south towards Midlothian. Continue on 67 pass the Midlothian exits continue to Ward Road exit; follow feeder road; make left under 67; cross RR track. You are there; parking lot is on your left.
MAY Summary - John MoffItt on earth’s extInctIon events
by Roger Farish
With John Moffitt being a master of the Earth/Universe Sciences, he is most adequate-ly prepared to analyze life’s various mass extinction events that have happened here on our blue marble. Earth appears blue because its surface is mostly water when in effect, the Earth is only ‘damp’ when you compare the total amount of water to the dry planet, and it is a rela-tively small amount of water. This is why we need to take better care of our oceans, because virtually everything we eat from the sea already contains a certain amount of plastic. The Universe is about 13.82 billion years old, our solar system is about 5 byo, and the Earth slightly less than that. Just as we rotate around our sun, our solar system rotates around the massive black hole at the center of our Milky Way Galaxy. It takes about 250 million years for a rotation, so about 3 rotations will take us back to the start of the Cambrian where multi-cell life began. Galileo had stated that, “All truths are easy to understand, once they are discovered - the point is to discover them.” Multiple forward thinking people lost their lives as heretics trying to explain the physical structure of our system. While Galileo and Copernicus were persecuted, Galileo did survive, and now the Catholic Church has erected a statue to him at the Vatican and does indeed acknowledge the age of the Universe as 13.82 byo.
Like all other celestial bodies, Earth is vulnerable to impacts by asteroids, comets, and other debris. These impacts are responsible for most, if not all, of our extinc-tions. Copernicus implied that the most important thing to know is to know what we don’t know (i.e. the less you think you know, the smarter you are). So, we need to know our adversaries by mapping the asteroids that could pose a threat. In the 1800s, we only knew of a few planets. By 1980, we had identified about 9,000 as-teroids, and by 2010, we were up to over 53,000 bodies at least the size of a bat-tleship orbiting throughout the solar system and its surrounding Kuiper Belt. It’s not a matter of ‘are’ we going to have another extinction event but ‘when.’ Supposedly, an asteroid about the size of a VW
bus exploded over Tunguska, Siberia, that leveled several hundred square miles of forest. The shock wave was even observed in Europe. Fortunately, it didn’t happen over a populated area. Impacts are still very possible. Beyond the Kuiper Belt is the Oort Cloud that contains many billions of comets, asteroids, etc. One nearby star (GL-710) is ‘screaming’ toward our Oort Cloud and could dislodge detritus toward our sun, but give this event several million more years. We can define our average planet circling an average sun and the other planets out to the Oort Cloud, but the distances be-tween these entities are amazing. For instance, traveling at our fastest known speeds, it would take about 500,000 years just to reach the nearest star. So, one has to laugh when discussions of isolated extraterrestrial visitations occur where they would do obscure things to a few people in remote areas - not possible to travel for centuries and then do silly things like has been reported. Continued next page
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MAY Summary CONTINUED
We can define our average planet circling an average sun and the other planets out to the Oort Cloud, but the distances be-tween these entities are amazing. For instance, traveling at our fastest known speeds, it would take about 500,000 years just to reach the nearest star. So, one has to laugh when discussions of isolated extraterrestrial visitations occur where they would do obscure things to a few people in remote areas - not possible to travel for centuries and then do silly things like has been reported. It helps to understand extinction events in relation to the Earth’s plates that have been moving around the surface in a lava lamp fashion. It seems that the North American Plate spent a lot of time near the equator so would be well suited to life per-petuation. India broke off of Antarctica and headed north and is still the fastest moving plate plowing into Asia and pushing up the Himalayan mountains at several inches per year. It was highly recommended that members obtain the ‘History of the Uni-verse’ chart we have available in our promotions area to help understand this and many other facts about our planet. The event that ended the Permian Period caused the most extinctions and occurred when we were near Pangea positioning of Earth’s plates, so terrestrial life was severely affected as well as marine life. Some people postulate that it was a volcanic event, but probably an impact of some sort triggered the volcanic activity. The Chicxulub (demon or devil’s tick) impact was the next largest event that generated a huge tidal wave of water as well as land. Yes, we lost the dinosaurs, but their extinc-tion made way for mammals and eventually us. Most mammals at that event were about an inch long or so, could find shelter, and subsist on less food than their larger counterparts. There were hundreds of extinction events with three significant events in the Devonian period alone. There was a Miocene extinction about 10 mya as well as one that did away with mega-mammals like mammoths, mastodon, sloths, cave bears, etc. Following a Thursday morning breakfast before John headed back to Houston, we paid a visit to the Institute for Creation Research (ICR) on Royal Lane at Luna Road. The front door was locked, and the receptionist communicated through a double-door entry via telecom and told us that all of their seven PhD scientists were in-volved in research and could not visit with us. They are involved in a massive build-ing expansion, and we were walking around that area when several people emerged with one being the Chief Communication Director who sparred with us for a while before giving us their 12-CD explanation of ICR and some of their research into ge-netics and the various earth sciences. They claim to be funded by ‘donors’ but their ‘science’ is disturbing as well as what they’re trying to transmit to their scientifically uneducated followers. Everyone loves science and what it is constantly doing for them but can’t accept science when it interferes with their myths and religion.
Cartoon above copyright Dan Regan.
DPS Needs You!
Needed: Temporary DPS Secretary
Purpose: Taking minutes at DPS Leadership meetings
Dates: June 20 and August 15 starting at 7:00pm
It’s a great volunteer opportunity because it’s not tricky, and you get to hear about
upcoming events and ideas before they are announced!
by Roger Farish On a splendid Saturday morning, some hearty souls donned six canoes (rented for attendees), six kayaks, and an inflatable ’banana boat.’ We then floated, dragged, and otherwise strolled down a creek that was barely navigable. Our normal four-five hour venture took over six hours for the last crews to exit the river. Normally, Denton Creek is kind to the DPS providing a unique wilderness experience AND enough ammonites and echinoids to enhance participants’ collections. The creek was indeed clean and pretty but just took more effort this time down. The collect-ing was stingy, although several small but ornate ammonites were found in addition to Macraster and Holaster echinoids. Still not a disparaging word was heard from the troops. Once you begin a journey on a stream, you don’t have much choice but to make it to the other end – ya can’t just quit. Still there were some truly brave and admirable endurance efforts displayed on this trip. Many thanks to David Hill for transporting the trailer of canoes to and from the creek. He also got them into the water having to traverse steep, unfriendly put-in terrain. Waterproof buckets were given to those who wanted them.
Continued next page
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DENTON CREEK CANOE TRIP continued
For next year we plan the following:
Monitor the Denton Creek Gauging Station just upstream from our put-in point to ensure we have ade-quate water to float
Enhance the signup procedure to avoid confusion Find a way to minimize front running – keep the group together better.
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JACKSBORO PHOTOS by Debbie Speed
Jacksboro Field Trip May 12—Collecting trip from the Finis shale basal member of the Graham formation. The age is late Pennsylvanian, 299-304 mya (closer to 304). Our fearless leader was Bob Williams. Linda and Nathan are field trip com-mittee chairs. Thank you all for making this field trip possible. Everyone had a great time collecting.
CALL FOR PAPERS The DPS is issuing a call for papers for Occasional Papers of the Dallas
The deadline for submission of papers is December 18, 2018.
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Hardin Mosasaur Excavation by Rocky Manning
In March 2018, Jack Champion was searching creeks in Fannin County, TX, for something interesting and found what he thought might be dinosaur teeth and jaws. He let his friend, the land owner Bill Hardin, know about it, and Bill contacted the Heard Museum. Darlene Sumerfelt, Heard Museum Fossil Lab Manager, checked it out and verified it was a significant fossil – mosasaur skull material. Mike Polcyn of SMU was then contacted, and he came out and determined it is definitely a mosasaur - probably of the genus Clidastes. Landowner, Bill Hardin, agreed to donate the specimen to SMU and plans were made to excavate. April 28, 2018, was the day of the excavation. In about 11 hours of work, exploration to determine the extent of the bone, trenching, individual removal of rib and scapula bones, undercutting to define the block, plastering, and flipping of the block were completed. After determining the block was too heavy and awkward to move out with the existing equipment and manpower, ar-rangements were made for a front end loader to come out the next day to carry the block out. After removal of the block, the edge of more bone could be seen exposed on the remaining bank. Another exca-vation will be scheduled later. The following photos give a pictorial report of the process:
The jaws and teeth in situ.
Photo at left Clockwise from top: Yasmine Jackson, Brianna Hardin, Darlene Sumerfelt, and Bill Stenberg explore around the bone to define the edges of the block that will be taken out. Photo at right After hand tool exploration determines there is no fossil in this area, Darlene Sumerfelt begins trenching around the fossil with a Hilti hammer drill.
Continued next page
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Mosasaur Excavation PAGE 2
Photo at left Trenches in the front and right are made (partially filled with rock debris).
Photo at right The crew and finders: Back (left to right): Bill Stenberg, Donna and Jack Champion, Myria Perez, Diana Vineyard, Yasmine Jackson, Front: Mike Polcyn, Darlene Sumerfelt, Wayne Furstenwerth, Behind the camera: Rocky Manning. Mike and Darlene extend the trenches around the block while Wayne widens the front trench.
Photo at left Myria Perez and Darlene Sumerfelt clear the back of the block. A rib and scapula had to be cleared before the trench could be completed and the plaster jacket could be applied. Bill Stenberg widens the front of the trench while Wayne Furstenwerth observes.
Photo at right Left to right: Mike Polcyn, Darlene Sumerfelt, and Wayne Furstenwerth further extend the trenches. Continued next page
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Mosasaur Excavation PAGE 3
Photo at left above Left to right: Diana Vineyard, Mike Polcyn, and Myria Perez work on defining the block that will be taken out. Photo at right above Darlene Sumerfelt leads SMU students Yasmine Jackson and Myria Perez in application of the plaster jacket while Bill Stenberg observes.
Photo far left Clockwise from top: After drilling several holes under the block with a Hilti ham-mer drill, Rocky Manning, Wayne Furstenwerth, and Mike Polcyn insert wedges into the holes. The wedges are repeatedly struck in sequence with a hammer until it cracks the block loose. Photo at left After cracking the block loose, it is flipped over.
Excess matrix on the bottom (now top) is removed to make it lighter. Continued next page
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Mosasaur Excavation PAGE 4
Photo at left The next day, a neighbor brings his front end loader to lift the block out. The block is prepared to be lifted by the front end loader.
Photo at right The front end loader lifts the block and carefully moves toward the awaiting transport SUV.
Photo at left The block is loaded and ready for transport to SMU.
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PIT CREW FIELD JOURNAL
June 2018 by Joseph O’Neil
May was a busy month for the PIT Crew. We began with another trip to the Martin Marietta Quarry in Midlothian, TX. It was the perfect day for collecting at the quarry. We spent the first two hours in a “practice pile” of matrix that our friends at Martin Marietta dumped for us in their lake area. Within five minutes of arriving, Felix Sturmer called out, “I think I found a tooth!” Sure enough, he had found a mosasaur tooth! What a great first find on his first time out with the PIT Crew! Many shark teeth, ptychodus, and others were found, as well as some gastropod
and inoceramus prisms, but Felix found the only mosasaur. Great eye, Felix! Felix and his mosasaur tooth
Picture at left Nixie Easley-O’Neil Picture at right Nathan and Kaori Tong
Continued next page
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PIT CREW CONTINUED
Picture above left Ellis and Devyn Howell Picture above right Carter, Allison, and AmyJo Maruschak Picture at left Klara and Felix Sturmer
After two hours of practice, the Field Agents and Paleo Pups were ready to try the real thing and we caravanned to the main quarry to hunt for fossils in situ. Those who have been before know how challenging it is to work the main quarry.
Continued next page
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PIT CREW CONTINUED
Picture above left AmyJo Maruschak Picture above center Carter Maruschak Picture above right Allison Maruschak Picture at left Nixie Easley-O’Neil showing her pyrite specimen
There is no shade at the quarry, and finding the right spot can be daunting, but everyone made some nice finds to take home. The cloud cover that we started the day with had cleared as the hour approached noon, and the temperature was rising. Our hosts provided an ice chest full of cold water for us. That was welcomed by all at the end of the hunt. It was another great adventure at Martin Marietta and we are grateful to our hosts for welcoming us back. Picture at right Bluebonnets are Texas-Strong growing in this barren environment
Continued next page
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PIT CREW CONTINUED
After the success of our quarry trip, we met again at UNT for a classroom adventure. This month, the topic was Cataloging Your Collection with a focus on digitizing (photographing) your fossils. We started out by discussing the importance of rounding our your collection by recording as much information about your specimens as possible. As an example of the type of information to collect, we looked at the data recorded in the Smithsonian fossil catalog. It proved to be a stellar example of comprehensive data that we can all strive for. A good collection isn’t complete without the research to back up your finds.
We looked at how to get good photos of our collections. Roger Farish’s article in the DPS book “Guide To Fossil Collecting by The Dallas Paleonto-logical Society” was a great reference. As a group, we built a light box to diffuse the lighting we used on the fossils, eliminating harsh shadows. These can be made easily using dollar store components. The difference in clarity of the photos is clear. After a brief explanation of photo stacking and a recommendation to “google it” for easy “how-to” instructions, we moved on to digital microscopy. Using a Celestron digital microscope and a laptop, we were able to see detail on fossils, large and small, that would be lost to the human eye. The microscope proved to be the star of the day. Thanks for a great May, PIT Crew! There is so much to come this summer. We will not have a meeting place for our classroom adventures until September as the University is using the space for summer programs. In place of the classroom adventures, we will be getting in more field work with a little field school included in each outing. More information will follow as plans are finalized. Top photo Extreme close up (XCU) of a bacculite from the North Sulfur River from the collection of Analiese Martinez Middle and lower photos Possible ammonite with worm tubes on surface from the coast of England from the collection of Charlie Preston
Joseph O’Neil Education Chairman Dallas Paleontological Society
The PIT Crew (Paleontologists In Training) is the educational outreach program of the Dallas Paleontological Society (DPS). The PIT Crew is a benefit of a Family Level Membership in DPS for ages 4 through 15. For more information, visit the website for upcoming events, announcements, and membership information.
Excerpts from the Perot Press Release dated May 15, 2018
ULTIMATE DINOSAURS EXHIBITION MAKES ITS TEXAS DEBUT JUNE 23, PLUS DISCOVERY DAYS, ADULTS-ONLY NIGHTS, EXTENDED HOURS, SUMMER DISCOUNTS, AND MORE TO INVADE THE PEROT MUSEUM
Can you dig it? The Perot Museum of Nature and Science is getting all prehistoric this summer as it celebrates the “summer of the dinosaur.” From the much-anticipated Ultimate Dinosaurs exhibition making its Texas debut, to summer discounts and extended hours, to all-new dinosaur-themed exhibits, programs, events, films, camps, and activities, the Perot Museum is sure to be a dino-mite destination for all ages this summer.
Funky frills? Check. Crazy claws? Check. Enormous dinosaurs that would have terrified T. rex? Check, check, check. Opening June 23, Ultimate Dinosaurs will put guests eye to eye with 20 exotic dinosaur species from the other side of the world, with cutting-edge technology that will “transport” them to prehistoric times. Not the typical T. rex and Triceratops that most know, these unique dinosaurs were fierce with gigantic skulls, crocodile-like faces, and exotic features. High-lights will include full-sized skeletons, plus life-sized video projections of the creatures, interactive games, augmented-reality viewers, and much more.
Stay tuned as the Museum unearths new dinosaur sights and experiences throughout the coming months. Details at perotmuseum.org/summer.
ULTIMATE DINOSAURS (Jun 23, 2018-Jan 6, 2019) These are not your grandfather’s dinosaurs! Based on ground-breaking research from scientists around the world, Ultimate Dinosaurs reveals rarely seen, exotic species from the other side of the world. From the tiny Eoraptor to the massive Giganotosaurus (T. rex's bigger, badder cousin), the exhibition is a fascinating introduction to dinosaurs that are unfamiliar to most North Americans. Presented locally by Highland Capital Management, Ultimate Dinosaurs tells the story of the break-up of supercontinent Pangaea into today’s continents and the amazing diversity of dinosaur species that evolved as a result. Highlights include 15 fully articulated dinosaur casts, more than a dozen prehistoric specimens, augmented reality to experience the dinosaurs in the flesh, touchable fossilized dino-saur specimens, hands-on play spaces featuring miniature dinosaur dioramas, and more.
Where better to be in the middle July in Texas than along cool, shaded Post Oak Creek screening for shark teeth in Sherman? Roger will be leading the prolific trip on Saturday, July 14.
Oliver Creek
Field Trip
The Annual Oliver Creek Field Trip is tentatively set for Saturday, August 11. Details will be in the July newsletter.
Did You See
What LEE Read?
New Jersey has an amazing fossil park! Lee shared an article from AAA.com called Digging for Dinosaurs at Rowan by Mike Shute. What an amazing experience! “Rowan alumni Jean and Ric Edelman announced that they would be making a gift of $25 million to their alma mater to ‘transform the Rowan University Fossil Park into a world-class destination for scientific discovery and citizen science.’” Field trip, anyone?
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Reminder of Membership Benefits by Rocky Manning
Renewing your Dallas Paleontological Society membership has numerous benefits: Newsletter: The Fossil Record, the Society’s monthly newsletter, is sent to all members. It has articles of
general interest and information on upcoming DPS events. Special Events: Members receive Eblasts on special events that pop up and reminders of upcoming events. DPS Website: Current members have access to the Members section of the DPS website, which includes
the Membership Directory, past newsletters, and documents of interest to fossil enthusiasts. Field Trips: Some field trips have limited access (quarries, Oklahoma trilobites, etc.), and some other events
are designated members-only. Excavations: Participation in FBI (Fossil Bureau of Investigation) excavations is limited to DPS members. Discounts: Fossil prep kits, display items, books, and other unique items are occasionally offered at a dis-
count to members. Occasional Papers: The Occasional Papers is a collection of more serious articles on paleontology written
by members. It is published every two to four years. One copy per membership is free to members current on date of publication. Past Occasional Papers are available for purchase.
Volunteerism: Volunteer opportunities to work the DPS booths provides community outreach, interaction with the public, and occasionally free entry to an event.
Family: Family Membership provides a discount to a second adult and allows for PIT Crew membership in which children can participate in special PIT Crew-only workshops, classroom activities, and field trips.
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Newsletter Submissions Wanted by Estée Easley, Editor
Attention members: Your input is desired! I’d love to see pictures and details from everyone in DPS! Please email your submissions to [email protected]. Here are some ideas:
Meeting pictures or summary Field trip pictures or summary Guest speaker summary Interesting paleontology article you found Ad for your custom display cases Commentary Latest fossil finds Volunteer event pictures and summary
Don’t be shy. My Oxford commas and I are always open to feedback, as well. “Loved the article on what people found at NSR.” “Why do you include so many pictures?” “There was a typo on page 6.” I hope to hear from you!
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Dallas Paleontological Society Officers, Committee Chairs, and Advisors
