Rootless cones on Mars indicating the presence of shallow equatorial ground ice in recent times

Geophysical Research Letters - Tập 28 Số 12 - Trang 2365-2367 - 2001
P. D. Lanagan1, A. S. McEwen1, L. Keszthelyi1, T. Thórdarson2
1Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona
2Department of Geology and Geophysics University of Hawaii at Manoa Honolulu Hawaii

Tóm tắt

High resolution Mars Orbiter Camera (MOC) images have revealed the existence of clusters of small cones in the Cerberus plains, Marte Valles, and Amazonis Planitia, Mars. These cones are similar in both morphology and planar dimensions to the larger of Icelandic rootless cones, which form due to explosive interactions between surficial lavas and near‐surface groundwater. Impact crater size‐frequency relationships indicate that surfaces upon which the cones sit are no older than 10 Ma. If martian cones form in the same manner as terrestrial rootless cones, then equatorial ground ice or ground water must have been present near the surface in geologically recent times.

Từ khóa


Tài liệu tham khảo

Allen C. C. Volcano‐Ice Interactions on the Earth and Mars inAdvances in Planetary Geology NASA TM‐81979 161–264 1980.

Burr D. M., 2000, Recent fluvial activity in and near Marte Valles, Mars, Lunar Planet. Sci.

Carr M. C., 1996, Water on Mars, 10.1093/oso/9780195099386.001.0001

10.1007/978-1-4615-4151-6_3

10.1029/JB088iB03p02456

Fagents S. A., 2000, Formation of pseudocraters on Earth and Mars (abstract), Volcano‐Ice Interactions on Earth and Mars, 13

10.1029/JB087iB12p09867

10.1029/JB084iB14p08075

Greeley R. andE.Theilig.Small volcanic constructs in the Chryse Planitia region of Mars NASA TM‐79729 pp. 1978.

10.1029/1999JE001189

10.1111/j.1945-5100.1999.tb01743.x

10.1006/icar.2000.6398

10.1029/1999JE001191

Keszthelyi L., 2000, Rubbly pahoehoe: A previously undescribed but widespread lava type transitional between aa and pahoehoe (abstract), GSA Abstracts with Programs, 32, 7

Lucchita B. K. Geologic map of the Ismenius Lacus quadrangle Mars scale 1∶5 000 000 U.S. Geol. Surv. Misc. Invests Map I‐1065 1978.

10.1029/95JE01027

10.1016/0019-1035(85)90090-9

10.1016/0019-1035(90)90095-Q

Scott D. H. andM. G.Chapman Geologic and topographic maps of the Elysium Paleolake basin Mars scale 1∶5 000 000 U.S. Geol. Surv. Misc. Invests Map I‐2397 1995.

10.1029/JB091iB13p0E139

10.1029/96JE02862

10.1007/BF02596003

Thordarson T., 2000, Rootless eruptions and Cone Groups in Iceland: Products of authentic explosive water to magma interactions (abstract), Volcano‐Ice Interactions on Earth and Mars, 48

Thordarson T., 1992, The 20th Nordic Geological Winter Meeting

Thông tin
Thông tin xuất bản

Geophysical Research Letters

Tập 28 Số 12

2365-2367

Thông tin tác giả