The Geology of Crater Lake National Park, Oregon With a reconnaissance of the Cascade Range southward to Mount Shasta by Howell Williams The Glaciation of Mount Mazama   Evidences of Early Glaciation on the Caldera Walls      Cleetwood Cove to Pumice Point Throughout this stretch of the caldera wall, as the panorama, plate 26, shows, … Continue reading 102 Cleetwood Cove to Pumice Point →

The Geology of Crater Lake National Park, Oregon With a reconnaissance of the Cascade Range southward to Mount Shasta by Howell Williams The Glaciation of Mount Mazama   Evidences of Early Glaciation on the Caldera Walls      The Northeast Wall, from Grotto Cove to Cleetwood Cove The thin flows which form the “primary slope” of … Continue reading 101 The Northeast Wall, from Grotto Cove to Cleetwood Cove →

The Geology and Petrography of Crater Lake National Park, 1902  PART I. MOUNT MAZAMA. LAVAS OF MOUNT MAZAMA.a DACITES. CLEETWOOD COVE DACITE FLOW. Among the final flows of the great volcano is the one of Cleetwood Cove. The rim at this point is remarkable. It is unlike any other portion of the rim in its … Continue reading 38 Cleetwood Cove Dacite Flow →

The Geology of Crater Lake National Park, OregonWith a reconnaissance of the Cascade Range southward to Mount Shasta by Howell Williams The Northern Arc of Vents   The Cleetwood Flow At Cleetwood Cove, on the north wall of Crater Lake, the stratified lavas and pyroclastic rocks are suddenly interrupted by a dark, jagged tongue of … Continue reading 44 The Cleetwood Flow →

The Geology of Crater Lake National Park, Oregon With a reconnaissance of the Cascade Range southward to Mount Shasta by Howell Williams Discovery and Early Exploration CRATER LAKE was discovered on June 12, 1853, by J. W. Hillman at the head of a party of prospectors from Jacksonville, Oregon. The discovery failed to arouse the … Continue reading 05 Discovery and Early Exploration →

16—Cleetwood-Sunnotch-Castlecrest complex, high elevation, 15 to 30 percent slopes  Map Unit Setting  General location: Meadows and whitebark pine forests on Mount Mazama Major land resource area (MLRA): 3 Elevation: 7,000 to 8,000 feet Average annual precipitation: 50 to 70 inches Average annual air temperature: 38 to 42 degrees F Frost-free period: 0 to 30 days … Continue reading 29 16—Cleetwood-Sunnotch-Castlecrest complex, high elevation, 15 to 30 percent slopes →

15—Cleetwood, thin surface-Llaorock-Cleetwood complex, 5 to 30 percent slopes  Map Unit Setting  General location: Deserts, forests, and meadows on Mount Mazama Major land resource area (MLRA): 3 Elevation: 6,000 to 7,500 feet Average annual precipitation: 60 to 80 inches Average annual air temperature: 38 to 42 degrees F Frost-free period: 0 to 50 days  Map … Continue reading 28 15—Cleetwood, thin surface-Llaorock-Cleetwood complex, 5 to 30 percent slopes →

14—Cleetwood, thin surface-Cleetwood-Dyarock complex, 2 to 20 percent slopes  Map Unit Setting  General location: Meadows and deserts on side slopes of Mount Mazama Major land resource area (MLRA): 3 Elevation: 6,000 to 7,500 feet Average annual precipitation: 60 to 80 inches Average annual air temperature: 38 to 42 degrees F Frost-free period: 0 to 30 … Continue reading 27 14—Cleetwood, thin surface-Cleetwood-Dyarock complex, 2 to 20 percent slopes →

13—Cleetwood-Castlecrest-Llaorock complex, 5 to 30 percent slopes  Map Unit Setting  General location: Meadows and forests on Mount Mazama Major land resource area (MLRA): 3 Elevation: 5,500 to 7,200 feet Average annual precipitation: 50 to 70 inches Average annual air temperature: 38 to 42 degrees F Frost-free period: 0 to 50 days  Map Unit Composition  Cleetwood … Continue reading 26 13—Cleetwood-Castlecrest-Llaorock complex, 5 to 30 percent slopes →

12—Cleetwood-Castlecrest complex, dry, 10 to 30 percent slopes  Map Unit Setting  General location: Meadows and forests in the southeastern part of the park Major land resource area (MLRA): 3 Elevation: 5,700 to 6,500 feet Average annual precipitation: 40 to 60 inches Average annual air temperature: 38 to 42 degrees F Frost-free period: 0 to 50 … Continue reading 25 12—Cleetwood-Castlecrest complex, dry, 10 to 30 percent slopes →