Results 101 to 110 of about 13,545 (201)

Glacial geology of the Hellas region on Mars [PDF]

A glacial geologic interpretation was recently presented for Argyre, which is herein extended to Hellas. This glacial event is believed to constitute an important link in a global cryohydric epoch of Middle Amazonian age.
Johnson, Natasha, Kargel, Jeffrey S., Strom, Robert G.   +2 more
core   +1 more source

Early history of the moon: Implications of U-Th-Pb and Rb-Sr systematics [PDF]

Anorthosite 60015 contains the lowest initial Sr-87/Sr-86 ratio (0.69884 + or - 0.00004) yet reported for a lunar sample. The initial ratio is equal to that of the achondrite Angra dos Reis and slightly higher than the lowest measured Sr-87/Sr-86 ratio ...
Nunes, P. D., Tatsumoto, M., Unruh, D. M.   +2 more
core   +1 more source

Venus: Geochemical conclusions from the Magellan data [PDF]

Though the Magellan mission was not designed to collect geochemical or petrological information, it has done so nonetheless. Since the time of the Pioneer Venus mission it has been known that high-altitude (greater than 2.5-5 km) mountainous areas on ...
Wood, J. A.
core   +1 more source

Meteoritic material on the moon [PDF]

Micrometeorites, ancient planetesimal debris from the early intense bombardment, and debris of recent, crater-forming projectiles are discussed and their amounts and compositions have been determined from trace element studies.
Anders, E., Ganapathy, R., Higuchi, H., Morgan, J. W.   +3 more
core   +1 more source

The oldest anchor for lunar crater chronology constrained by the new age of 4.25 Ga of the South Pole-Aitken basin. [PDF]

Natl Sci Rev
Xu YG, Chen J.
europepmc   +1 more source

Lunar chronology model with the Chang'e-6 farside samples and implications for the early impact history. [PDF]

Sci Adv
Yue Z, Gou S, Wang Y, Li H, Michael G, Liu J, Sun S, Lin Y, Di K, Li Q, Chen Y, Yang W, Xie B, Hu S, Li S, Zheng B, Mao T, Li X, Wu F.   +18 more
europepmc   +1 more source

A Chronology of Mars Hydrological Evolution from Impact Degradatio [PDF]

, 2012
Adeli, S., Asan, V., Conway, S., Langlais, B., Mangold, N.   +4 more
core   +1 more source

Stabilized impact flux on the Moon at 2.8 Ga constrained by Chang'e-6 low-Ti basalts. [PDF]

Innovation (Camb)
Luo F, Xiao Z, Wang Y, Xu YG.
europepmc   +1 more source

Increased small impactor flux on the Moon as inferred from regolith thickness at the Chang'E-5 Region. [PDF]

Nat Commun
Zhang M, Jia B, Eke VR, Fa W.
europepmc   +1 more source

The Effects of Terrain Properties Upon the Small Crater Population Distribution at Giordano Bruno: Implications for Lunar Chronology. [PDF]

J Geophys Res Planets, 2022
Williams JP, Pathare AV, Costello ES, Gallinger CL, Hayne PO, Ghent RR, Paige DA, Siegler MA, Russell PS, Elder CM.   +9 more
europepmc   +1 more source