dc.contributor.author |
Conca, James |
|
dc.contributor.author |
Hubbard, Norman |
|
dc.coverage.spatial |
Moon |
|
dc.date.accessioned |
2020-05-18T21:15:23Z |
|
dc.date.available |
2020-05-18T21:15:23Z |
|
dc.date.issued |
1979 |
|
dc.identifier.uri |
https://hdl.handle.net/20.500.11753/1534 |
|
dc.description.abstract |
The major geologic units in and around the Smythii basin are reflected in the Al2O3 and MgO values obtained using improved orbital X-ray fluorescence data from Apollo 15. One of these units is a high albedo plains-forming unit that has Al2O3 and MgO concentrations different from those of similar plains-forming units located in the terra west of Smythii and south of Crisium and also different from those of adjacent terra and mare materials. The chemical composition of the plainsforming unit suggests a volcanic origin; the inferred Al2O3 and MgO-rich nature of this presumed early volcanic material is supported by the fact that even the later, low albedo, lightly cratered mare fill in Mare Smythii has a high MgO value, and its Al2O3 concentration is higher than that of similar basaltic material in other maria. |
en |
dc.description.statementofresponsibility |
James Conca, Department of Geological Sciences, Brown University, Providence, Rhode Island 02908 and The Lunar and Planetary Institute, Houston, Texas 77058, Norman Hubbard, NASA Johnson Space Center, Houston, Texas 77058 |
|
dc.format.extent |
Pages 1727-1737 |
|
dc.format.mimetype |
application/pdf |
|
dc.language.iso |
en |
en |
dc.publisher |
Pergamon Press |
en |
dc.relation.ispartof |
Proceedings of the tenth Lunar and Planetary Science Conference, Houston, Texas, March 19-23, 1979 |
|
dc.relation.ispartofseries |
LPI contribution ; no. 383 |
|
dc.subject |
Lunar craters |
en |
dc.subject |
Lunar geology |
en |
dc.subject |
Aluminum oxide |
en |
dc.subject |
Magnesium oxide |
en |
dc.title |
Evidence for early volcanism in Mare Smythii |
en |
dc.type |
Book chapter |
en |