On November 25, paleontologist Martin Lockley handed on the age of 73. PopSci spoke with Lockley about his profession learning dinosaur tracks and footprints earlier this yr.
Rows of razor-sharp tooth. Femur bones the dimensions of phone poles. The towering skeleton of an animal taller than a giraffe. The replicas of dinosaur our bodies and large fossils housed inside pure historical past museums world wide are often our first publicity to the long-gone world of those extinct animals. Their sheer measurement attracts individuals of all ages into the misplaced world of dinosaurs. However, for paleontologist Martin Lockley, it was their dinosaur footprints and tracks that stole the highlight and launched his paleontology profession.
“People found footprints interesting, but they had this perception that they were not very useful for interpretation of dinosaur activity. I don’t know why that was. You don’t have to be an expert to realize that tracks are made by animals,” Lockley instructed PopSci by telephone in October.
[Related: A newly discovered sauropod dinosaur left behind some epic footprints.]
Born in Wales in 1950, Lockley was a pioneer within the examine of the dinosaur tracks and footprints preserved in rock formations world wide. He taught for over 30 years on the University of Colorado and revealed greater than 1,000 peer-reviewed scientific papers, wrote 17 books. The dinosaur ichnogenus Lockleypus was named in his honor in 2018. Along the best way, he earned a number of awards, together with the University of Colorado Student Generated Award for Teaching and the Korean Presidential Citation for Contribution to Cultural Heritage Protection in 2020.
Lockley was additionally the driving power behind the preservation observe websites together with the Dinosaur Ridge tracksite in Morrison, Colorado. The protected website is now one of many premier dinosaur observe areas in North America. He additionally helped construct the University of Colorado’s Fossil Tracks Collection of roughly 3,000 unique or duplicate specimens of footprints and trackways and 1,600 full-size footprint and trackway tracings of quite a lot of extinct species.
“Some of the more interesting sites were made by smaller animals and they’re not the more typical known dinosaur tracks. We found tracks of pterosaurs and even some other smaller reptiles,” mentioned Lockley.
Lockley’s work helped his fellow paleontologists perceive what fossil footprints can inform us about dinosaurs and the world that they lived in.
“Martin created dinosaur footprint science,” colleague and curator on the New Mexico Museum of Natural History and Science Spencer Lucas tells PopSci. “Through his energy, drive, and his collaborative spirit he created a whole subdiscipline of paleontology.”
What hint fossils inform us
The footprints and tracks left behind by dinosaurs and different prehistoric animals are known as hint fossils. These imprints can supply clues to how rapidly an organism walked or ran and even what their pores and skin could have regarded like. Compared with the physique fossils of bones to tooth, hint fossils comprise proof of the interactions that the animals had with their surroundings and might depict what the bodily surroundings could have regarded like. According to Lucas, they provide a extra dependable solution to estimate the pace of a dinosaur than analyzing the skeleton.
“If you go back to the first Jurassic Park movie, where that T-rex is chasing the Jeep, you’ve had people who’ve looked at skeletons and said they could run 30 miles an hour or something,” says Lucas. “You’ve had other people have said these big dinosaurs could not run so fast. The problem with T-rex is we don’t have any trackways. We’ve only found a few isolated footprints.”
A T-rex trackway could be one of the simplest ways to get a dependable estimate of the dinosaur’s pace whereas working. Trace fossils supply a glimpse of historical animal behaviors, whereas physique fossils inform us about their anatomy and construction. Having each sorts of fossils presents paleontologists the very best complete view of the dinosaurs.
“One of the most interesting things is why are there some formations that have only tracks or most tracks and very few bones, whereas others are mostly bones and very few tracks,” mentioned Lockley. “It appears to have to do with preservation of certain conditions, whether it is wet or dry land that leads to good preservation of tracks in the formations, where others lead to more preservation of tracks.”
[Related: After 60 years, a mysterious Australian dinosaur just got downsized.]
According to Lockley, one of many enduring mysteries this subsequent technology of dinosaur observe hunters may resolve is why sure species have left behind extra bones than tracks, whereas others left behind extra tracks and fewer bodily specimens.
“Triceratops-like dinosaurs are very common as bones, but are rare as tracks,” mentioned Lockley. “It does not appear to be related to size because we have other track sites in these formations that have large tracks. They’re still as common as other dinosaurs.”
How discoveries occur
Lockley was a lifelong pupil of nature who grew up trying to find shells and fossils alongside the seashores of Wales. The son of the late ornithologist Ronald M. Lockley, his father inspired him to “just go out and observe and trust your observations.” He took that recommendation with him to the United States the place he noticed the ability of the “right place and right time” nature of scientific discovery very early. When he first arrived in Colorado in 1980, a pupil first steered that Lockley go to a collection of dinosaur tracks in Gunnison, southwest of Denver. The tracks would show life-changing, as Lockley documented the then little studied or understood website. It turned out to be the biggest dinosaur observe website in North America.
“The discoveries that excited me most have been so serendipitous,” mentioned Lockley. “They came about from just walking along a beach going to what looked like one thing and finding that it’s something completely different.”
Following footprints world wide
While North America is dwelling to a few of the largest variety of fossil footprints on the planet, Lockley’s work with prints took him far and huge. He explored fossil and observe websites in China, South Korea, Spain, South Africa, Mexico, Bolivia, and the United Kingdom.
[Related: New dinosaur species is nicknamed Jurassic’s ‘smallest runner.’]
These footprints are good stand-ins for extinct animals, even when they’re discovered on completely different continents. They additionally present priceless data that bones or different stays wouldn’t essentially reveal.
“Martin has been very international in scope,” collaborator and Columbia University paleontologist Paul Olsen tells PopSci. “He was working on some South Korean tracks and found that they had beautiful skin impressions. It wasn’t a surprise that it had that kind of skin, but we wouldn’t have known those details without the footprints,” says Olsen.
In addition to discovering the tracks, Lockley devoted time and vitality preserving these essential elements of the fossil file. This consists of navigating the politics wanted to create UNESCO world heritage websites in order that future generations wouldn’t lose out on these treasured relics of the previous. His friends cite Lockley’s dedication to preserving and selling dinosaur tracksuits and footprints world wide as his legacy.