Diogenites and 4 Vesta: Diogenite meteorites are orthopyroxene ± olivine rich rocks that form part of the howardite-eucrite-diogenite (HED) meteorite suite [1, 2]. The HED parent-body is thought to be the ~530 km diameter asteroid 4 Vesta [3, 4], target of the recently launched DAWN mission. Homogeneous Oisotope systematics for HED meteorites are consistent with wholesale melting of their paren...

First-year seedlings of shortleaf pine (Pinus echinatu Mill.), southern red oak (Quercus falcatu Michx.), and white oak (Quercus alha L.) were subjected to simulated prescribed burns during August (growing season) or January (dormant season) on an IJpper Coastal Plain site in southeastern Arkansas, U.S.A. Survival and growth of resprouting rootstocks were compared with control seedlings through...

The new large Iunar meteorite MAC88105 is a dense breccia, with lithic and mineral clasts and fragments set into a welded matrix. It is a regolith breccia which shows some recrystallization and evidence for a late shock event during which anorthositic glass veins were formed. Shock effects (most probably due to the impact ejection from the moon) are present throughout the sample and require a s...