Would you classify oil shale as a biochemical sedimetary rock?

Biochemical sedimentary rocks form from sediment derived by biological processes. This typically occurs in the ocean where a variety of atoms float among the water molecules. read more

I suspect that if you classified oil shale as a biochemical rock, it would be too general a description to apply to all oil shales. The source material and the processes that form the oil shale can vary. read more

Oil shale is a muddy rock contains Kerogen. So I think in oil shale to be a mixture of Kerogen and mud sediments, and that's not the case, for instance, with the biochemical limestone where the solid remains of the living organisms formed the rock. read more