From oldest to youngest, these are the pre-Tolstojan (>~4.0 Ga), Tolstojan (~4.0 to ~3.9 Ga), Calorian (~3.9 to ~3.5–3.0 Ga), Mansurian (~3.5–3.0 to ~1.0 Ga), and Kuiperian (<~1.0 Ga). Mercury's pre-Tolstojan system includes ancient multiring basins and extensive inter...
Tantalus Fossae are linear grabens bounding Alba Mons with an average strike orientation of N/NE (blue arrows on Figure 1) and are considered the oldest of the graben systems. They are assumed to have been formed by a combination of regional stress and a broad uplift due to a buoyancy ...
Despite the name,brown dwarfsare not very brown. These objects, with masses ranging from 12 times that of Jupiter up to half the mass of the sun, emit light on their own … just usually not very much. The largest and youngest ones are quite hot, giving off a steady glow of warm ligh...
oldest lunar crustalterranesbased on counts of small craters (Fig. 2.6). This might imply that many or most of the lunar basins are ∼4.3Ga in age and that only the youngest basins are associated with the canonical terminal cataclysm at 3.9Ga. However, that scenario appears to be ...
youngest: northern oldest: southern Where would you find blueberries on Earth (and Mars) Meridiani Pkanum, formed by water below the surface Why is Deimos so oddly scarred? it might be asteroid, Jupiter pushed it from asteroid belt and Mars gravity pulled it in ...
GEOMAGIA50.v3 is a comprehensive online database providing access to published paleomagnetic, rock magnetic, and chronological data from a variety of materials that record Earth’s magnetic field over the past 50 ka. Since its original release in 2006, t
and/or too cool relative to even the oldest isochrones). One possible solution is to invoke an unresolved companion of comparable luminosity. It is highly unlikely that the companion is responsible for the observed radial velocity variations in each star, as that would require ...
The streaks occur on a patch of volcanic plains with very low radar backscatter that appears to be the oldest rift-related flow unit superposing the regional plains. These very smooth flows are superposed by radar bright (i.e., rougher) flow fields from fractures on the western side of ...
The eastern young mare units (Em3 and Em4; <2 Ga) are among the youngest mare basalts on the Moon. They have never been explored in situ or studied in the laboratory. We suggest that samples returned from the eastern mare unit (Em4) could answer many fundamental questions and that this...
While the X-ray amorphous components of our paleosol samples are much younger than the X-ray amorphous components in Gale crater, these materials are still likely some of the oldest yet reported on Earth, suggesting that more work is needed to understand the thermodynamics and kinetic reactivity ...