The Cave Creek Museum will host “Black Mountain: A Study in Black & White” from 2 to 4 p.m. Saturday, Nov. 9. Guest speaker and museum member Stephanie Bradley will give an overview of the geology of the Desert Foothills. If the boulders at “the boulders” aren’t really boulders, what are they? Why is Black Mountain black? And why do saguaros mostly grow on the west slope? What kind of precious minerals lurk under the earth that drove prospectors to our region? Bradley will bring ancient geology to life in the museum’s historic church.