1. The problem statement, all variables and given/known data During a visit to mountainous area, students noticed a high mountain consists of 3 different parts: The top of the mountain consists of fossiliferous limestone. The middle of the mountain consists of fine grained rocks. The foot of the mountain consists of thick layers of boulder, gravel and tree trunks. Which of those parts belongs to a marine environment? And which belongs to an aerobic environment? And which belongs to a river environment? 3. The attempt at a solution The top (fossiliferous limestone) -----> marine environment The middle (fine grained rocks) -----> aerobic environment. The base (boulder, gravel and tree trunks -----> River environment. Am I right?