In 2012, the Spitsbergen Jurassic Research Group led by National Geographic Explorer Dr. Jørn Hurum finished off their final field season on Svalbard. After eight consecutive years, the project of locating and excavating marine reptiles from the Upper Jurassic has been a success. Nevertheless, the team is not as dead as the reptiles. Down in the dark basement of the Geological Museum there is a laboratory, where all the prehistoric sea monsters from Svalbard are brought back to life.
By Aubrey Roberts and Victoria Engelschiøn Nash
Finally, we are ready to show some real science from the sea monster lab! Well, yes this is slow work. And painting and toilet paper can be more than slightly amusing. But alas, the sea monsters are the reason for us writing this blog, is it not?
If you have spent time going through the other posts, you are becoming a bit of an expert on how to prepare a fossil, sea monster style . Or at least you could pretend to, if you wanted to impress friends. Therefore, we will not repeat how this transformation of bone has taken place, but rather show you how beautiful “Gully” is becoming. A work of art.
A Walk-through of the Main Stages of Sea Monster Preparation
Unprepared jacket. Covered in shale as when unearthed in field.
After removing a couple of inches of shale, we start to see a flipper emerge. Notice the amount of finger bones.
All the loose shale is gone, now the cleaning process begins. In the upper part of the photo, part of the backbone lies next to what was once a massive flipper.
Why Are Flippers Important?
When it comes down to preservation, the propodialia or limbs of these majestic sea monsters tend to fare better during the fossilization process than the rest of the skeleton. The upper arm (humerus) and thigh (femur) bones are usually thick and robust and can withstand a lot more pressure than for example the thin bones of skulls can. Besides the fact that, they have four of them. The flippers of ancient marine reptiles have a number of differences between species and groups, which makes it possible to find out what species you have got. Or maybe it is something new to science? Though skulls are even better, they are hard to come by (particularly for plesiosaurs) and often poorly preserved. So, as we have no skull for “Gully”, its flippers are essential for rebuilding this “origin of myths”.
The last stages of preparation, the jacket has been turned and cleaned from the other side. Success!Nearly perfect! Photo courtesy of Aubrey Roberts
Read All the “Sea Monsters 2013” Blog Posts.