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Lunar ring dikes from orbiter I.

J A O'keefe, P D Lowman, W S Cameron

    Science (New York, N.Y.)
    |January 6, 1967
    PubMed
    Summary
    This summary is machine-generated.

    Lunar orbiter images reveal a large circular formation

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    Area of Science:

    • Lunar geology
    • Planetary science
    • Volcanology

    Background:

    • Analysis of lunar surface features provides insights into the Moon's geological history.
    • Understanding volcanic processes on the Moon is crucial for comparative planetology.

    Purpose of the Study:

    • To analyze the morphology of a large circular formation on the Moon.
    • To determine the geological processes responsible for its formation.

    Main Methods:

    • Analysis of orbiter photographs of a lunar circular formation.
    • Geomorphological analysis of the formation's wall structure.
    • Calculation of slope angles and material viscosity.

    Main Results:

    • The formation's wall exhibits a convex shape, consistent with viscous lava flow.

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  • Slopes are gentler than the angle of repose for dry rock, making mass wasting unlikely.
  • Estimated viscosity of the material is approximately 10^13 cgs units, suggesting an acid lava composition.

    • Conclusions:

    • The observed lunar formation is likely a volcanic structure formed by viscous acid lava.
    • The findings challenge mass wasting as the primary formation mechanism.
    • This study contributes to understanding lunar volcanism and geological processes.