Results 121 to 130 of about 35,040 (307)
Volcanology and morphology [PDF]
Apollo 15 photographs of the southern parts of Serenitatis and Imbrium were used for a study of the morphology and distribution of wrinkle ridges. Volcanic and structural features along the south margin of Serenitatis were also studied, including the ...
Bryan, W. B.
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Topographic Relaxation of Complex Impact Craters in a Clathrate Crust on Titan
The Planetary Science JournalTitan’s impact craters are significantly shallower than fresh craters on Ganymede, which are often used as templates for fresh craters on Titan. The presence of a clathrate crust on Titan, which would insulate the ice shell and maintain warmer ice near ...
Gwendolyn Brouwer +5 more
doaj +1 more source
Venus impact craters: Implications for atmospheric and resurfacing processes from Magellan observations [PDF]
Observations of impact craters on Venus by Magellan yield important insights into: (1) atmospheric effects on the formation of impact craters and their attendant ejecta deposits and (2) the resurfacing history of the planet.
Phillips, Roger J.
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A Second Large Subglacial Impact Crater in Northwest Greenland? [PDF]
Following the discovery of the Hiawatha impact crater beneath the northwest margin of the Greenland Ice Sheet, we explored satellite and aerogeophysical data in search of additional such craters.
Bottke, William F., Jr. +7 more
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Bony fish genomes: Status and gaps
Journal of Fish Biology, EarlyView.Abstract Bony fish constitute an exceptionally species‐rich group of aquatic vertebrates, comprising more than 95% of all living fish. The adaptive processes on the diversity of environments they inhabit make them a highly diverse group from taxonomic, morphological and evolutionary standpoints.
Noelia Pérez‐Pereira +3 more
wiley +1 more source
Episodic plate tectonics on Venus [PDF]
Studies of impact craters on Venus from the Magellan images have placed important constraints on surface volcanism. Some 840 impact craters have been identified with diameters ranging from 2 to 280 km. Correlations of this impact flux with craters on the
Turcotte, Donald
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Journal of Anatomy, EarlyView.Black‐tailed prairie dogs are highly social ground squirrels that excavate communal burrow systems, most often in medium‐textured soils. Their forelimbs demonstrate morphofunctional trade‐offs for scratch‐digging and terrestrial ecology, including well‐developed and fast‐contracting proximal musculature with large mechanical advantage paired with ...
Luke A. Scheetz +4 more
wiley +1 more source
Crater Dimensions on the Dwarf Planets
The Planetary Science JournalThe icy dwarf planets of Pluto, Charon, and Ceres provide important geologic comparisons for each other as they possess similar gravities and experience impacts of similar velocities compared to larger planets and moons.
Veronica J. Bray +12 more
doaj +1 more source
Relative chronology of Martian volcanoes [PDF]
Impact cratering is one of the major geological processes that has affected the Martian surface throughout the planet's history. The frequency of craters within particular size ranges provides information about the formation ages and obliterative ...
Barlow, N. G., Landheim, R.
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