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Line drawing of the MOIST profile Interpretation

VSA Author: Estelle Mortimer
Date Created: 2008-02-20

A line drawing interpretation of the MOIST seismic reflection profile after Brewer and Smythe (1984) from the principle reflectors. Here, dipping reflectors are approximately in their correct locations, and a conversion to depth is achieved roughly by multiplying TWT by 3. Principle structures are identified as well as the location of the Moho, lower crust and two possible positions of the Moine thrust. The Flannan thrust (Flannan reflector) is the first bright reflector in the lithospheric mantle to have been imaged by deep seismic reflection anywhere on Earth. Since the MOIST survey, further interpretations e.g., Snyder (1990) suggest that the Moine thrust is in neither location suggested by this interpretation, which instead correspond to the Swordly and Naver thrusts (other Caledonioan structures).


  • Interpretation Administrator:
    • Rob Butler
  • VSA Author:
    • Estelle Mortimer

Geological Interpretation

Deformation Structures
Normal Faults, Thrusts

Moho, Mobile Belts

Age of Deformation
Devonian, Silurian

Geological Context

Plate Settings and Margins

Orogenic Belt, Rifts

Basin Setting
Continental Rifts

Geographic Context

Physical Geography

Political Geography
United Kingdom of Great Britain & Northern Ireland


Survey Information
Marine, Multichannel 2D, >10s, Migrated

Data Presentation
Vertical Scale - Time, Amplitude

Image Type
Vertical Profile