"Hey, this is kind of interesting."
Mr. Kevin Quick, a science department faculty member and assistant on our summer Peccary Trip, handed me a fist-sized rock cobble with a piece of fossil bone poking out of the side.
"Where did you find that?!" I exclaimed. Seeing a distinctive dimpled texture on the bone's surface, I was definitely intrigued. Not only was it from a crocodile, it was a piece of crocodile skull! A very rare find, indeed.
This is just one snapshot of a day collecting fossils in southern Utah. Every summer, Alf Museum staff, Webb faculty, students, and volunteers make the trek from Claremont to Grand Staircase-Escalante National Monument. As one of the last, great, unexplored dinosaur deposits in the continental United States, a major find could turn up at any time. In 2004, a museum volunteer found the skull of a new species of dinosaur. In 2005, a Webb student discovered the partial skeleton of a previously unknown tyrannosaur. And just a few weeks ago, this non-descript piece of rock added another important dimension to our knowledge of Earth's past.
Although our primary purpose is scientific, these summer Peccary Trips (named after a peccary, or pig, skull found on an early expedition) also offer important life lessons for our Webb students. We have to hike several miles across some of Utah's most remote and rugged terrain just to get to the edge of the fossil beds. This effort isn't purely physical - it also takes a mental toughness to push through to the end. Even the students who have never camped or hiked in such conditions before quickly rise to the challenge. In the pursuit of discovering fossils, students learn perseverance and the importance of teamwork, and this new crocodile find would prove to be a great challenge.
The cobble of rock had a relatively fresh broken surface, so more bone had to be out there somewhere. One of the most basic rules of fossil collecting is to always follow the bone uphill. In this case, the task was daunting. The original find was found at the bottom of a steep 100-foot high slope covered in brush, loose rock, and mud from a recent rainstorm. The fossil could have come from nearly anywhere!
Recruiting a half-dozen students, Mr. Quick started the arduous task of locating the original bone layer. Literally leaving no stone unturned, they spent nearly two hours on that slope. Searching on the last day of the trip, we didn't have a lot of time, so this could be our only chance to find the rest of the specimen.
Finally, Sam Woodward ’12 found it. A thin lens of sandstone, nearly entirely obscured by loose debris, hosted a big chunk of crocodile skull. Sam and Mr. Quick did a fantastic job of carefully exposing the fossil, using small hand tools and special glues to preserve the delicate bone. I let out a brief exclamation of extreme happiness - this could be a major find!
We only had a few hours left before we had to leave the field, not nearly enough time to properly collect the specimen. Furthermore, I could see that the find was potentially large enough that we would need an excavation permit to continue. Sadly, we will have to endure another long lesson in patience as it won’t be until next year when find out just how much of that crocodile is in the hillside. Somewhat reluctantly, we stabilized the specimen and covered the site for the coming winter.
Mr. Quick, the students, and I are all abuzz about our latest find. How much of the crocodile skull is there? What kind of crocodile is it? Is it a species new to science? After 75 million years, we'll just have to wait one more year to find out.