Sparks from a Geologist's Hammer

Agassiz Aiguille Aiguilles du Midi Amer American ancient animal aphelion ascent basin beauty beneath brine cause Chamonix climate cloth cold continent continental coördinated creation crevasses Croll depth descend Dome du Goûter earth elephant epoch equine Europe evidence evolution existence external fact formation forms geological geologists Glace glaciation Glacier des Bossons Grand Haven guides gypsum heat heaven hemisphere human influence intelligence islands isothermal isothermal chart Jour Kewahwenaw Lake Huron Lake Michigan land latitude LÉVY ET CIE Mackinac mammoth mastodon mean Mer de Glace miles minus Mont Blanc Mont Maudit mountain nature northern northern hemisphere ocean Orohippus passed peninsula phenomena Plateau portion possess present Professor Rangatira reached region relation rise river rocks Saginaw salt Sandstone scientific seems shore side Silurian slope snow species stretches structure succession summer summit surface temperature terrestrial theory thousand tion valley winds winter