One model for the formation of deposits of this mineral, the schizohaline model, (**)involves the creation of a mixing zone between fresh and ocean water. The zone allows this mineral to precipitate at 5:1 or even 1:1 calcium to magnesium ratio. Another model involves the removal of calcium via evaporate deposition in sabkhas, (*) both of which are solutions to this mineral's namesake problem. It can be distinguished from a similar mineral by the saddle shape of its crystals. For 10 points name this mineral that is the 
One model for the formation of deposits of this mineral, the schizohaline model, (**)involves the creation of a mixing zone between fresh and ocean water. The zone allows this mineral to precipitate at 5:1 or even 1:1 calcium to magnesium ratio. Another model involves the removal of calcium via evaporate deposition in sabkhas, (*) both of which are solutions to this mineral's namesake problem. It can be distinguished from a similar mineral by the saddle shape of its crystals. For 10 points name this mineral that is the namesake of a mountain range in Italy and has the formula CaMg(CO3).
One model for the formation of deposits of this mineral, the schizohaline model, (
dolomite