Complex sentence: Based on speleologist findings, the depth of Šaran pit is around 42.5 meters to the first bones, that pit should contain in depths around 40 cubic meters of bones (unless if the pit has an underground gallery or underground waters).
Split into simpler sentences: Based on speleologist findings, the depth of Šaran pit is around 42.5 meters to the first bones. That pit should contain in depths around 40 cubic meters of bones (unless the pit has an underground gallery or underground waters).