R. Greeley

Publications1,033
h-index87
Citations25,769
Highly Influential Citations1,413
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Geologic map of the eastern equatorial region of Mars
Martian impact craters and emplacement of ejecta by surface flow
Several types of Martian impact craters have been recognized. The most common type, the rampart crater, is distinctively different from lunar and Mercurian craters. It is typically surrounded by…
Tectonic Processes on Europa: Tidal Stresses, Mechanical Response, and Visible Features
Abstract Europa's orbital eccentricity, driven by the resonance with Io and Ganymede, results in “diurnal” tides (3.5-day period) and possibly in nonsynchronous rotation. Both diurnal variation and…
Stratigraphy and sedimentology of a dry to wet eolian depositional system, Burns formation, Meridiani Planum, Mars
Magma Generation on Mars: Amounts, Rates, and Comparisons with Earth, Moon, and Venus
TLDR
Total extrusive and intrusive magma generated on Mars over the last ∼3.8 billion years is estimated at 654 x 106 cubic kilometers, or 0.17 cubic kilometers per year, substantially less than rates for Earth and Venus but much more than for the Moon.
Wind as a geological process: Wind as a geological process
Dust devils on Earth and Mars
Dust devils, particle‐loaded vertical convective vortices found on both Earth and Mars, are characterized by high rotating wind speeds, significant electrostatic fields, and reduced pressure and…
Threshold windspeeds for sand on Mars: Wind tunnel simulations
Wind friction threshold speeds (u*t) for particle movement (saltation) were determined in a wind tunnel operating at martian surface pressure with a 95 percent CO2 and 5 percent air atmosphere. The…
Fluid lava flows in Gusev crater, Mars
[1] Rocks on the floor of Gusev crater are basaltic in composition, as determined from measurements by the Mars Exploration Rover, Spirit. On the basis of compositional data, models of the basaltic…
Resurfacing history of Europa from pole-to-pole geological mapping
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