Notice below:
(PDF) How not to become a fossil-Taphonomy of modern whale falls (researchgate.net)
Few whale carcasses have been reported from shallow waters (Smith, personal
communication), which may be due to the high rate of scavenging and current activity that
destroy and disperse the bones. In deep water, whale carcasses endure longer, and it takes a
few years to several decades to completely destroy a skeleton (Smith and Baco 2003),
depending on the specific environmental conditions
Few whale carcasses have been reported from shallow waters (Smith, personal
communication), which may be due to the high rate of scavenging and current activity that
destroy and disperse the bones. In deep water, whale carcasses endure longer, and it takes a
few years to several decades to completely destroy a skeleton (Smith and Baco 2003),
depending on the specific environmental conditions
Few whale carcasses have been reported from shallow waters (Smith, personal
communication), which may be due to the high rate of scavenging and current activity that
destroy and disperse the bones. In deep water, whale carcasses endure longer, and it takes a
few years to several decades to completely destroy a skeleton (Smith and Baco 2003),
depending on the specific environmental conditions
“Few whale carcasses have been reported from shallow waters (Smith, personal communication), which may be due to the high rate of scavenging and current activity that destroy and disperse the bones. In deep water, whale carcasses endure longer, and it takes a few years to several decades to completely destroy a skeleton (Smith and Baco 2003), depending on the specific environmental conditions.”
What is a whale fall? (noaa.gov)
“The whale skeleton can support rich communities for years to decades , both as a hard substrate (or surface) for invertebrate colonization and as a source of sulfides from the decay of organic compounds of whale bones. Microbes live off of the energy released from these chemical reactions and form the basis of ecosystems for as long as the food source lasts.”
As you can see, from these two sources, a whale fall generates and supports a microbe community–down to the sulfides, resulting from the final stage of bone disintegration.
Sure, there might be a case or two of some bones that escaping total breakdown, but these would certainly be the exception.
It’s also significant that in the fossil record, where whale bones fossilized by permineralization, many nearly complete skeletons have been found–such as in the Atacama desert in Chile (over 40 nearly complete skeletons). Now…have you ever read of nearly complete whale skeletons lying on the present-day ocean floor?
So, obviously the fossil record was not at all the product of marine animals just dying, and their skeletons drifting down into sea sediments.