Keeping that youthful look

Article Abstract:

The Magellan spacecraft's radar images of Venus showed that global resurfacing has eliminated most of that planet's impact craters. The American Geophysical Union meeting in San Francisco, CA on Dec 7-11, 1992, focused on the possible causes of this resurfacing. Although some participants argued that the resurfacing took place in episodes over the last 500 million years rather than all at once, most participants preferred the catastrophic model. Time-variable mantle convection and lithospheric instability are the two proposed causes of catastrophic resurfacing.

Models, Craters, Surface (Geology), Venus (Planet)

---

Enigmatic northern plains of Mars

Article Abstract:

The planet of Mars' northern plains are known to form the flattest surface in the Solar System, but the topography shows terraces and ridges that suggest the presence at some time of an ocean. Changes in the northern plains' linear slopes are recognized as possible shorelines of an ocean that existed earlier in Mars' history.

Physiological aspects, Mars (Planet), Topographic maps

---

Sediments to planetary motion

Article Abstract:

Research is presented describing study of Mediterranean earth sediment to investigate astronomical and planetary rotational history.

Research, Sediments (Geology), Rotational motion, Rotation (Motion), Sediments

Similar abstracts:

• Abstracts: Applying metapopulation theory to conservation of migratory birds. Response of avian communities to historic habitat change in the northern Chihuahuan Desert
• Abstracts: Pumping of nutrients to ocean surface waters by the action of propagating planetary waves. Decreasing overflow from the Nordic seas into the Atlantic Ocean through the Faroe Bank channel since 1950
• Abstracts: Is science losing its objectivity? Questions of direction
• Abstracts: Platelets and proteases. Small matters, big issues. Small cells, big issues
• Abstracts: Mutations make enzyme polymerize. Editing of ubiquitin conjugates by an isopeptidase in the 26S proteasome

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.