985 resultados para 120-749B
Resumo:
Vorbesitzer: Abraham Merzbacher
Resumo:
Vorbesitzer: Dominikanerkloster Frankfurt am Main
Resumo:
Vorbesitzer: Leonhardstift Frankfurt am Main;
Resumo:
Vorbesitzer: Leonhardstift Frankfurt am Main;
Resumo:
Rubr. Kapitelanfänge mit roten und blauen Init.; Vorbesitzer: Leonhardstift Frankfurt am Main
Resumo:
We present successful 81 Kr-Kr radiometric dating of ancient polarice. Krypton was extracted from the air bubbles in four∼350-kg polar ice samples from Taylor Glacier in the McMurdo Dry Valleys, Antarctica, and dated using Atom Trap Trace Analysis (ATTA). The 81 Kr radiometric ages agree with independent age estimates obtained from stratigraphic dating techniques with a mean abso-lute age offset of 6±2.5 ka. Our experimental methods and sampling strategy are validated by (i) 85 Kr and 39 Ar analyses that show the samples to be free of modern air contamination and (ii)air content measurements that show the ice did not experience gas loss. We estimate the error in the 81 Kr ages due to past geomagnetic variability to be below 3 ka. We show that ice from the previous interglacial period (Marine Isotope Stage 5e, 130–115 ka before present) can be found in abundance near the surface of Taylor Glacier. Our study paves the way for reliable radiometric dating of ancient ice in blue ice areas and margin sites where large samples are available, greatly enhancing their scientific value as archives of old ice and meteorites. At present, ATTA 81Kr analysis requires a 40–80-kg ice sample; as sample requirements continue to decrease, 81 Kr dating of ice cores is a future possibility.
Resumo:
Beermann
Resumo:
Vorbesitzer: Johann Hieronymus Zum Jungen;
Resumo:
Wolf Feilchenfeld
Resumo:
Wolf Feilchenfeld
Resumo:
Chr. Hoffmeister
Resumo:
Vorbesitzer: Bartholomaeusstift Frankfurt am Main;
Resumo:
u.a.: Heinrich August Carl Ganslandt;
Resumo:
Bitte um Entschuldigung, daß Stoltze versehentlich nicht zu einer Schulprüfung (mit Rezitation seiner Gedichte) eingeladen wurde
