Geologic evolution of Galileo Regio, Ganymede
Abstract
A geological map of Galileo Regio is presented and the crater materials in the area are considered along with the tectonic structures and the geological history of the region. The area's furrow systems were probably produced by extensional stresses that occurred during crustal solidification but before large craters could be retained. Smooth terrain concentrated in the southern part of Galileo Regio probably resulted from fluid extrusions along fractures associated with the dominant furrow system. The distribution of smooth terrain in the region suggests that the ancient crust of Ganymede was relatively thin in the equatorial region and thickened poleward. The age relationships, morphology, and geometry of the furrow systems do not favor an origin by impact of tidal stressing.
- Publication:
-
Lunar and Planetary Science Conference Proceedings
- Pub Date:
- February 1984
- DOI:
- 10.1029/JB089iS02p0B419
- Bibcode:
- 1984LPSC...14..419C
- Keywords:
-
- Ganymede;
- Geological Surveys;
- Planetary Evolution;
- Planetary Geology;
- Structural Properties (Geology);
- Craters;
- Crustal Fractures;
- Crusts;
- Mapping;
- Tectonics;
- Terrain Analysis;
- JUPITER;
- SATELLITES;
- GANYMEDE;
- GALILEO REGIO;
- GEOLOGY;
- EVOLUTION;
- MORPHOLOGY;
- TERRAIN;
- CRATERS;
- TECTONISM;
- AGES;
- DESCRIPTION;
- PATTERNS;
- STRESS;
- CRUSTS;
- DISTRIBUTION;
- FEATURES;
- SURFACE;
- FORMATION;
- THICKNESS;
- EQUATORIAL REGIONS;
- POLAR REGIONS;
- ORIGIN;
- STRATIGRAPHY;
- IMPACTS;
- RHEOLOGY;
- VISCOSITY;
- RELAXATION;
- TIDAL EFFECTS;
- Lunar and Planetary Exploration; Jupiter