Of course, that's only at first. In reality, a variety of microorganisms live within the human body; these would form the foundation of a new ecosystem. The bones would, over the course of several years, sink into the core, while the various organic components would break down into amino acids. When a great mass of meat dies, residual metabolism continues to generate heat, which cannot easily escape in masses like these; this is documented to occur in blue whales, which cook themselves when killed. At this level, the residual metabolism would be so immense that it would boil away the water, causing it all to bubble to the surface, generating a loud, hellish whistle that fills the planet. Eventually the water vapor would saturate in the atmosphere, falling as pure rain. The blood cells would sink to the bottom of the ocean of blood, leaving plasma on top, while the fats and lipids would bubble above it all, caking everything in light, fluffy fat. Of course, microorganisms would flourish.
Geologically, it would be very different, as silicon is all but absent in the body when compared to the earth; silicates simply would not form, leaving carbonates to fill the void.
Forgive me, I simply cannot stop thinking about this.