The preservation of ancient bones is a marvelous phenomenon. So exceptionally can these remains be preserved that their internal structure remains intact, especially in a type of sedimentary fossil bed called a Lagerstätte.
, and the apatite crystals found therein were a different form from apatite crystals usually found in bones.
The chemistry of the bones suggests that hydrothermal fluids – superheated water from under Earth's crust – seeped into the rock, heating it to temperatures around 300 to 350 degrees Celsius and melting the apatite present in the bones. As the bones cooled, the apatite recrystallized into the tabular form the scientists observed.
"We have also been able to radiometrically date the apatite which shows it formed during a time when all the continents on Earth were coming together and colliding to form the supercontinent Pangaea,""As these continents collided, they formed mountain belts with super-heated subterranean fluids flowing of them. It is these superheated fluids, which flowed throughout Ireland that cooked and melted the bones of these fossils causing the alteration we see today.
As far as we know, this is unique to Jarrow, and helps contextualize the history of the formation and its bones.
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