AF31 Base Visit Book Ellsworth AFB

DA5 Base Visit Book Defense Agencies Leased Space - VA (DISA)

The high time resolution Pb-Pb ages and short-lived nuclide based relative ages for CAIs and chondrules are reviewed. The solar system started at 4567.2 {+-} 0.6Ma inferred from the high precision Pb-Pb ages of CAIs. Time scales of CAIs ({le}0.1Myr), chondrules (1-3Myr), and early asteroidal differentiation ({ge}3Myr) inferred from {sup 26}Al relative ages are comparable to the time scale estimated from astronomical observations of young star; proto star, classical T Tauri star and week-lined T Tauri star, respectively. Pb-Pb ages of chondrules also indicate chondrule formation occur within 1-3 Myr after CAIs. Mn-Cr isochron ages of chondrules are similar to or within 2 Myr after CAI formation. Chondrules from different classes of chondrites show the same range of {sup 26}Al ages in spite of their different oxygen isotopes, indicating that chondrule formed in the localized environment. The {sup 26}Al ages of chondrules in each chondrite class show a hint of correlation with their chemical compositions, which implies the process of elemental fractionation during chondrule formation events.

Interview with Major Anna K. Schelper, a Army WWII veteran from San Antonio, Texas. Schelper discusses her parents, growing up, her education and becoming a nurse, joining the Army Nurse Corps, experiences serving throughout the Pacific Theater, service in hospitals after the war, continued education and promoting, and reflections on her career and being a servicewoman. In appendix are Schelper's Army service record, a letter from two former patients to the 23rd Field Hospital, a scan of some of her letters which were printed in a book, and a scan of some sections from The Army Nurse Corps: Yesterday and Today by Mary M. Roberts.