"Bone marrow in ca. 10 Ma frogs and salamanders from the Miocene of Libros, Spain, represents the first fossilized example of this extremely decay-prone tissue. The bone marrow, preserved in three dimensions as an organic residue, retains the original texture and red and yellow color of hematopoietic and fatty marrow, respectively; moldic osteoclasts and vascular structures are also present."
http://geology.gsapubs.org/content/34/8/641.abstract
“the first fossilized example of this extremely decay-prone tissue. “
“fossilized” Seems pretty clear from your own example.
From your own post:
“represents the first FOSSILIZED example of this extremely decay-prone tissue”
LMAO. Give it GGG, this is getting embarrasing.