Igneous Structures and Field Relationships - Faculty web pages

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Figure 4-154 15. Ash cloud <strong>and</strong> deposits of the 1980 eruption of Mt. St. Helens. a. Photo of Mt. St. Helens vertical ash column, May 18, 1980 (courtesy USGS). b. Vertical section of the ash cloud showing temporal development during first 13 minutes. c. Map view of the ash deposit. Thickness is in cm. After Sarna-Wojcicki et al. ( 1981) in The 1980 Eruptions of Mount St. Helens, Washington. USGS Prof. Pap., 1250, , 557-600.
Figure 4-164 16. Approximate aerial extent <strong>and</strong> thickness of Mt. Mazama (Crater Lake) L ash fall, erupted 6950 years ago. After Young (1990), Unpubl. . Ph. D. thesis, University of Lancaster. UK.
Page 1 and 2: Chapter 4: Igneous Structures and F
Page 3 and 4: Structures and Field Relationships
Page 13 and 14: c Figure 4-124 12. c-e. Illustratio
Page 15: Structures and Field Relationships
Page 19 and 20: Figure 4-184 18. Types of pyroclast
Page 23 and 24: Figure 4-22. a. Radial dike swarm a
Page 25 and 26: Figure 4-24. a. Map of ring dikes,
Page 31: Figure 4-344 34. Diagrammatic illus

Igneous Structures and Field Relationships - Faculty web pages

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