Doubt regarding Oil shale geology
Hi there, i just wanted a clarification regarding "One theory supposes that the organic material in the Irati oil shale originates from algae deposited in a freshwater to brackish lacustrine environment"......In the above sentence, what does the phrase "freshwater to brackish lacustrine environment" mean??? Does it mean "oil shale originates from algae deposited in a freshwater environment" or does it mean "oil shale originates from algae deposited in a brackish lacustrine environment" ??? or does it mean something else???....