Ancient Multiring Basins on the Moon Revealed by Clementine Laser Altimetry

@article{Spudis1994AncientMB,
  title={Ancient Multiring Basins on the Moon Revealed by Clementine Laser Altimetry},
  author={Paul D. Spudis and Jeffrey J. Gillis and Robert A. Reisse},
  journal={Science},
  year={1994},
  volume={266},
  pages={1848 - 1851}
}
Analysis of laser altimetry data from Clementine has confirmed and extended our knowledge of nearly obliterated multiring basins on the moon. These basins were formed during the early bombardment phase of lunar history, have been filled to varying degrees by mare lavas and regional ejecta blankets, and have been degraded by the superposition of large impact craters. The Mendel-Rydberg Basin, a degraded three-ring feature over 600 kilometers in diameter on the lunar western limb, is about 6… 

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