Contents P reface v Our Mission vii Introduction to the Geological S ociety of America 1 A Bit of Our 1 25 Y ear History 2 A Note about Headquar ter s Arc hitecture 3 Nature s P rocesses A Brief L esson in Geology 4 Nature The Original Ar tist 5 Exhibits Outdoor 9 Fir st Floor 15 Garden L evel 19 S econd FloorW est Wing 37 S econd FloorEast Wing 38 Third Floor 45 Bibliograph y 53 Index of Specimens 55