REPORT:
Recent Eruptive History of Mount Hood, Oregon, and Potential Hazards From Future Eruptions

Table of Contents

• Abstract
• Introduction
  • Drainage
  • Glaciation
  • Volcanic rocks of Mount Hood
  • Deposits of old mudflows and pyroclastic flows from Mount Hood
• Part I -- Recent eruptive periods and their products
  • Polallie eruptive period
    • Deposits of pyroclastic flows and mudflows
    • Ash-cloud deposits and the Parkdale soils
    • Age and origin of the Polallie deposits
  • Timberline eruptive period
    • Deposits of pyroclastic flows and mudflows
    • Ash-cloud deposits
    • Age and origin of the Timberline deposits
  • Old Maid eruptive period
    • Deposits in the Sandy River valley
    • Deposits in the White River valley
    • Crater Rock dome
    • Ash-cloud(?) deposit
    • Recent flood deposits
  • Recent (Historic?) Pumice
• Part II -- Volcanic hazards assessment
  • Potential volcanic hazards
    • Pyroclastic flows and associated ash clouds
    • Explosive lateral blasts
    • Tephra
    • Mudflows and floods
    • Volcanic gases
  • Hazard zones
    • Pyroclastic-flow, mudflow, and flood hazard zones PA and PB
    • Mudflow and flood hazard zones MA, MB, and M
    • Lateral-blast hazard zones LA and LB
    • Ash-cloud hazard zone
    • Discussion of hazard zones
  • Planning for the next eruption
    • Planning before an eruption occurrs
    • Predicting the next eruption
    • Warning signs of an impending eruption
    • What to do if there are signs of an impending eruption
• References Cited
• Appendices
  • A - Terminology
  • B - Measured sections
  • C - Chemical analyses
  • Index

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