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Morphological and geographical evidence for the origin of Phobos grooves from HRSC Mars Express images


, : Morphological and geographical evidence for the origin of Phobos grooves from HRSC Mars Express images. Geological Society, London, Special Publications 356(1): 21-41

The surface of Phobos, the 2718 km inner moon of Mars, is dominated by several families of parallel grooves. At least seven different groups of hypotheses have been advanced to explain their origin, but studies have always been limited by the fact that, until recently, much of Phobos was imaged at a resolution too low to show grooves. Now, however, the High Resolution Stereo Camera (HRSC) on board the European Mars Express mission has made 134 imaging fly-bys past Phobos. The pictures of the previously poorly imaged regions and much of the rest of the satellite have been returned with resolutions down to a few metres, facilitating the construction of a more complete map of the grooves. Each of the seven hypotheses was tested against the new data on groove morphology, positions and orientations, and it was found that six of the previous hypotheses could be discarded. The only hypothesis to pass all tests was that they are chains of secondary impact craters from primary impacts on Mars. An implication of these results is that previous estimates of an unusually thick Phobos regolith of 1–2 m depth are no longer necessary, and our conclusions place no constraints on the interior of Phobos, so recent evidence that Phobos is a ‘rubble pile’ is consistent with our work. The preferred hypothesis also sheds light on the origin of crater chains on Eros, and on impact processes in the early stages of crater excavation.

US$19.90

DOI: 10.1144/SP356.3


Other references

Brantsch, K.Dietmar.; Moehrle, M., 2010: Acanthosis nigricans in a patient with sarcoma of unknown origin. Journal of the American Academy of Dermatology 62(3): 527-528

Griffin, T.J.; Smith, L.M., 2000: Genetic identification by mass spectrometric analysis of single-nucleotide polymorphisms: ternary encoding of genotypes. An approach to genetic identification using biallelic single-nucleotide polymorphism (SNP) genetic markers is described in which the three possible genotypes, AA, Aa, or aa, where "A" and "a" represent the two SNP alleles, are...

Holldack, K., 1951: Phonocardiography in diagnosis of the heart. Arztliche Wochenschrift 6(28): 649-654

Kheĭdemanis, K.K.; Petushkova, T.N., 1974: Effect of hydrocortisone, thyroxine and alloxan diabetes on the incorporation of the labelled acetate-1-C14 into the lipids of the adrenal glands and testis in rats. Problemy Endokrinologii 20(5): 100-104

Foster Donald Immer, 1958: Summary of the stratigraphy of the Minnelusa Formation, Powder River Basin, Wyoming. Pages 39-44 1958

Chapon F.; Viader F.; Fardeau M.; Tome F.; Daluzeau N.; Berthelin C.; Thenint J.P.; Lechevalier B., 1989: Hereditary myopathy with cytoplasmic spheroid bodies revealed by respiratory failure. Revue Neurologique (Paris) 145(6-7): 460-465

Keenan, A.; Husley, T.C.; Alexander, G.R., 1992: The disparity between black and white low birth weight births explored in an historical cohort analysis. American Journal of Epidemiology 136(8): 981

Gadiolet Y.; Bayle J.Y.; Perol M.; Guerin J.C., 1990: Bronchial tuberculosis four cases. Revue de Pneumologie Clinique 46(3): 109-113

Florant G.L.; Turner B.M.; Heller H.C., 1978: Temperature regulation in marmots marmota flaviventris during entrance into hibernation. Journal of Thermal Biology 3(2): 92

Krason, S., 1964: Post-Traumatic Rupture Of The Kidney With Complete Avulsion Of The Vascular Pedicle. Polski Przeglad Chirurgiczny 36: Suppl:1313-6