mckitterick:sixpenceee:The Marble Cathedral is a formation the mineral calcium carbonate on the shor
mckitterick:sixpenceee:The Marble Cathedral is a formation the mineral calcium carbonate on the shores of Lake General Carrera in Chile . Over the years, the lake water have eroded the scarps coastal creating these formations, which when the lake is at a low level, you can go inside in small boats.Calcium carbonate comes mostly from dead shellfish. This is, then, literally THE BONES OF THE EARTH. -- source link