Geologic map of part of the Tyrrhena Patera region of Mars (MTM Quadrangle-20252)
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Abstract
Mars Transverse Mercator (MTM) -20252 quadrangle contains the volcano Tyrrhena Patera, a low, broad structure that has summit depressions and is dissected by prominent radial channels (fig. 1). Tyrrhena Patera is surrounded by cratered plains materials on the western edge of Hesperia Planum, ~2,000 km northeast of the center of the Hellas basin (Greeley and Guest, 1987; U. S. Geological Survey, 1991). On the basis of Mariner 9 data, Tyrrhena Patera was interpreted to be a shield volcano, composed of fluid basic or ultrabasic lavas (Peterson, 1978; Pike, 1978). Analysis of Viking Orbiter images led Greeley and Spudis (1981) to suggest that Tyrrhena Patera comprises pyroclastic deposits produced by explosive hydromagmatic eruption; Greeley and Crown (1990) support a pyroclastic origin for Tyrrhena Patera shield materials and assess several eruption styles for the volcano (see also Crown and Greeley, 1993).
Suggested Citation
Gregg, T., Crown, D., and Greeley, R., 1998, Geologic map of part of the Tyrrhena Patera region of Mars (MTM Quadrangle-20252): U.S. Geological Survey IMAP 2556, 1 Plate: 65.40 × 54.75 inches, https://doi.org/10.3133/i2556.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Geologic map of part of the Tyrrhena Patera region of Mars (MTM Quadrangle-20252) |
| Series title | IMAP |
| Series number | 2556 |
| ISBN | 0607917830 |
| DOI | 10.3133/i2556 |
| Year Published | 1998 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | 1 Plate: 65.40 × 54.75 inches |
| Other Geospatial | Mars, Tyrrhena Patera |
| Scale | 502000 |