An example of biomagnification would be: A. Chemicals in effluent that is dumped into local rivers that empty into a larger bay.
B. Mercury is transformed into an organic mercury compound which is highly toxic
C. Heavy metals from different sources are all dumped into the same lake, resulting in toxic concentrations.
D. Low concentrations of a chemical are absorbed by algae and retained in fish at much higher concentrations.

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.