LATERAL VARIATIONS IN CRUSTAL STRUCTURE BENEATH THE MONTANA LASA

Abstract

The analysis of a variety of geologic and geophysical data indicates that significant lateral variations in crustal structure exist across LASA. This structural complexity is inferred from observation of Rayleigh wave dispersion, body-wave spectral ratios, P-wave amplitude and travel-time anomalies, seismic refraction profiles and gravity and magnetic anomalies. To explain these results, LASA is divided into an eastern and a western sector. An attempt is made to explain the observations in each sector in terms of crustal models consisting of 3 to 5 distinct layers. The observations show that the maximum lateral change in structure across LASA takes place in a NE-SW direction.

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Document Details

Document Type
Technical Report
Publication Date
Feb 16, 1968
Accession Number
AD0827679

Entities

People

  • P. Glover
  • Simon Alexander

Organizations

  • Teledyne Technologies

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Computer Programs
  • Earth Sciences
  • Geography
  • Geological Surveys
  • Greenland Sea
  • Group Velocity
  • Magnetic Anomalies
  • Magnetic Properties
  • Measurement
  • Phase Velocity
  • Power Spectra
  • Rayleigh Waves
  • Ridges
  • Rocky Mountains
  • Surface Waves
  • Travel Time
  • United States

Readers

  • Seismology

Technology Areas

  • AI & ML