Frontispiece. Eunice Lake, northwest of Mount Rainier. Figure Page 1. Outcrop of sandstone and shale in the Puget Group 6 2. Outcrop of welded tuff in the Stevens Ridge Formation 8 3. Granodiorite looks like granite 9 4. Geological cross section of Mount Rainier 10 5. An old lava flow which forms Rampart Ridge 13 6. Columns of andesite at the end of an old lava flow 13 7. Layers of pumice on the floor of a cirque 14 8. Generalized distribution of some pumice layers 16 9. Breadcrust bomb enclosed in a mudflow deposit 19 10. Pumice layer C, which consists of light-brown fragments 20 11. The recent lava cone lies in a depression 21 12. Two ice streams meet to form Cowlitz Glacier 23 13. Glacier-smoothed and grooved rock 26 14. A lake lies behind an end moraine of Flett Glacier 27 15. Recessional moraines on the valley floor of Fryingpan Creek 28 16. Extent of glaciers between 15,000 and 25,000 years ago 30 17. Lateral moraine at Ricksecker Point 31 18. Rock-glacier deposit at The Palisades 33 19. Hummocky end moraine in front of Emmons Glacier 34 20. Avalanche deposits in the White River valley 37 21. The northeast flank of Mount Rainier 39 Table 1. Characteristics, sources, and ages of pumice layers, Mount Rainier National Park 17 2. Summary of important geologic events in the history of Mount Rainier National Park 41 The Geologic Story of Mount Rainier By Dwight R. Crandell [Illustration: Map of Cascade Range] WASHINGTON Seattle Tacoma CASCADE RANGE Mount Rainier Mount Adams Mount St Helens OREGON Portland Mount Hood _Crater Lake_