Parkinson burrow occhy through in california (source: http://www.gosnow.com/earth/science/californ바카라ia/vancouver/2015/04/04/chronic-dementia-caves-and-chilcotin-gases.htm) http://en.wikipedia.org/wiki/Caustic rock_fractures_and_vascular_pathology#Caustic-fracture
The link above provides some more detail on some of these, in order to show how little is actually known about these. For example, they know a lot about the fossil-based environment and climate of the Cretaceous period and their role (in a large-scale) in our current climate system, but not a lot about the biological influences of our time which is where most of the archaeological finds occur. There’s more to be learned about the biology of the Cretaceous period, but little about its effects on living humans. I also don’t think there’s much understanding of the processes that formed our modern fossil record. All these things would have to be re-examined in a modern way.
The fact that these finds are “the most important finds from the Cretaceous period”, or some such thing like that shows how little is actually known about the Cretaceous period.
The other points that seem to be important are the amount and types of sediments left out of rock