Local-scale stratigraphy of grooved terrain on Ganymede

Details Local-scale stratigraphy of grooved terrain on Ganymede Local-scale stratigraphy of grooved terrain on Ganymede

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..505m&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 505-507 (SEE N87-23341 16-91)

Mathematics

Logic

Ganymede, Grooves, Jupiter Satellites, Planetary Surfaces, Stratigraphy, Terrain Analysis, Geological Surveys, Landforms, Morphology, Polygons

Scientific paper

The surface of the Jovian satellite, Ganymede, is divided into two main units, dark terrain cut by arcuate and subradial furrows, and light terrain consisting largely of areas with pervasive U-shaped grooves. The grooved terrain may be subdivided on the basis of pervasive morphology of groove domains into four terrain types: (1) elongate bands of parallel grooves (groove lanes); (2) polygonal domains of parallel grooves (grooved polygons); (3) polygonal domains of two orthogonal groove sets (reticulate terrain); and (4) polygons having two to several complexly cross-cutting groove sets (complex grooved terrain). Reticulate terrain is frequently dark and not extensively resurfaced, and grades to a more hummocky terrain type. The other three grooved terrain types have almost universally been resurfaced by light material during their emplacement. The sequence of events during grooved terrain emplacement has been investigated. An attempt is made to integrate observed geologic and tectonic patterns to better constrain the relative ages and styles of emplacement of grooved terrain types. A revised model of grooved terrain emplacement is proposed and is tested using detailed geologic mapping and measurement of crater density.

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