The interior of the cake represents the hill formations 125 million years ago in the south of Quebec (called the Monteregian hills). Altering colors for cake batter to give folds in the sedimentary rock when the igneous rock pushed up. The baked chocolate cake in a bowl represents the igneous rock intrusion. There is also a pink layer of icing between to represent contact metamorphism. The geode was made by supersaturating a sugar syrup and letting it cool in a bowl to take shape. I added the fondant after it dried. The rock cores are also fondant.