The gang discusses two papers about unique taphonomic conditions. One paper describes how these strange “train wrecks” of crinoid columnals might have formed, and the other paper models how bone jams in Dinosaur National Park could have formed. Meanwhile, James’s computer has a flux capacitor, Amanda mishears the best new BBC crime drama, and Curt enjoys the chance to talk about Nathan Fillion vehicles.

 

Up-Goer Five (Amanda Edition):

 Today our friends talk about animals with hard parts on their insides. Some of these animals have long arms with lots of parts and look like they sit on sticks. Others have many inside hard parts in place along their backs, and that is where they get their names. The animals with the long arms with lots of parts sometimes break into small pieces when they die. Usually they break into lots of little single round things, or they are very quickly covered up and are found all put together. But sometimes they break into big pieces that look like a train ran into another train. This paper talks about why they do that. They have long, strong bits of stuff like what is found on your knee. This stuff does not break down so easy and sometimes that is why you get these bigger pieces. The other paper looks at animals with hard parts inside their bodies put in a place along their backs, and what happens when these animals die and their hard parts come together in a moving water place. This paper does this by making tiny ones of the hard parts and putting them in a not-real moving water place. They find that these hard parts easily stick together and it explains why some of the these hard parts look the different ways they do once the animals are dead.  

 

References:

 Donovan, Stephen K. "Train crash crinoids revisited." Lethaia. 

 Carpenter, Kenneth. "Use of scaled dinosaur bones in taphonomic water flume experiments." Die Naturwissenschaften 107.3 (2020): 15-15.