989 resultados para Leigh, Philip, 1651-1717.
Resumo:
udarb. af A. D. Cohen
Resumo:
udg. paa Foranledning af Eduard Rée ved Josef Fischer
Resumo:
von Salomon Goldschmidt
Resumo:
To calibrate the in situ 10Be production rate, we collected surface samples from nine large granitic boulders within the deposits of a rock avalanche that occurred in AD 1717 in the upper Ferret Valley, Mont Blanc Massif, Italy. The 10Be concentrations were extremely low and successfully measured within 10% analytical uncertainty or less. The concentrations vary from 4829 ± 448 to 5917 ± 476 at g−1. Using the historical age exposure time, we calculated the local and sea level-high latitude (i.e. ≥60°) cosmogenic 10Be spallogenic production rates. Depending on the scaling schemes, these vary between 4.60 ± 0.38 and 5.26 ± 0.43 at g−1 a−1. Although they correlate well with global values, our production rates are clearly higher than those from more recent calibration sites. We conclude that our 10Be production rate is a mean and an upper bound for production rates in the Massif region over the past 300 years. This rate is probably influenced by inheritance and will yield inaccurate (e.g. too young) exposure ages when applied to surface-exposure studies in the area. Other independently dated rock-avalanche deposits in the region that are approximately 103 years old could be considered as possible calibration sites.
Resumo:
Scan von Monochrom-Mikroform
Resumo:
von Dr. Conwentz
Resumo:
Signatur des Originals: S 36/F06635
Resumo:
Signatur des Originals: S 36/F10055
Resumo:
Signatur des Originals: S 36/G03518
Resumo:
Verf. ermittelt
Resumo:
Die im Katalog angegebene Blattzahl weicht von der vorhandenen ab; der Band wurde für die Digitalisierung neu foliiert.