Document Type

Article

Publication Date

10-1979

Abstract

The Smythii basin has the most extensive topographic coverage of ans-tmar multi-ringed basin. Topographic data are here used to study the norphology and norphometry of Smythii and to make comparisons with similar basins. The depth of the basin is shown to be over 8 km, which is comparable to that of Orientale. The inner ring reaches heights of 3.4 km, while the intermediate ring cxhibits little relief. Lowest points in the basin are related to mare ridges. Basin volume is estimated to be 2.1 X 10'km³ Evidence suggests that significant differences in substrate characteristics may have existed for the Smythii and Orientale impacts.

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