Elsewhere in the Mesozoic, parts of the field crew were working away at Cretaceous dinosaurs in the Mussentuchit Member of the Cedar Mountain Formation. In may we worked at Crystal Geyser Quarry, which is in the Yellow Cat Member of the same formation and is about 125 million years old, in a part of the Cretaceous called the Barremian. In contrast, the Mussentuchit Member is about 98 million years old, or Cenomanian in age. The Cedar Mountain Formation is a giant unit of rock, and the dinosaur faunas changed dramatically throughout!
The dinosaur fauna of the Mussentuchit is still poorly known, and we still don’t know very much about the dinosaurs of the ‘middle’ Cretaceous compared to the Jurassic (like the Morrison Formation) or the Late Cretaceous (like my previous fieldwork in Alberta and Mongolia). There are still many new dinosaurs to be discovered here! This quarry has produced a new small iguanodontian, nicknamed Fortunate Son for the time being while we prepare its bones and until it is formally described.
The views from this quarry are terrible. Just awful.
The Fortunate Son quarry was about a 30-40 minute hike from camp and generally a very pleasant place to work. However, when the weather looks like this, you’re probably going to get wet.
This particular thunderstorm was threatening us for a long time, but when the sky opened up it was worse than expected and an almost instantaneous drenching. Here we are hiding from the lightning! For extra bonus fun, we had to walk over the highest hill in the vicinity in order to return to camp, so we had to wait this one out for a long time until we thought it was safe. When we finally tried heading home, the slick wet mud made us very slow, and the lightning started again by the time we got to the top of the hill. GOOD TIMES. Lindsay also posted about our stormy weather at the Expedition Live blog!
Camp wasn’t much drier!
Later that day, a second thunderstorm rolled through, throwing hail onto us like I haven’t experienced before. Grape-sized hail came down for at least 15 minutes straight, so we figured we may as well try to get some free ice for our drinks.
Haviv made the best of the bad weather with some mud sculpting!
We also spent some time prospecting for new localities, although I didn’t find anything particularly exciting. The strata here are much more deformed than what I’m used to, making for some steep hiking! The red rocks towards the bottom are Jurassic Morrison Formation, and the buff coloured rocks above are largely the Ruby Ranch Member of the Cedar Mountain Formation, with Mussentuchit Member rocks closer to the top.
Here’s a kind of ok 180-panorama from the highest point I climbed to one day. Click to embiggen!
Next time, we meet a Decepticon.