Accession Number:

AD0827679

Title:

LATERAL VARIATIONS IN CRUSTAL STRUCTURE BENEATH THE MONTANA LASA

Descriptive Note:

Seismic data lab rept.

Corporate Author:

TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV

Personal Author(s):

Report Date:

1968-02-16

Pagination or Media Count:

83.0

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.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE