Nicholas j shackleton (2 risultati)
OXYGEN ISOTOPE ANALYSIS AND SEASONALITY DETERMINATIONS: LIMITS AND POTENTIAL OF A NEW TECHNIQUE.
Bailey, Geoffrey N. & Margaret R. Deith & Nicholas J. Shackleton.
Lingua: Inglese
Editore: Society for American Archaeology, Washington, D.C.
- Brossura
Da: Legacy Books, Louisville, KY, U.S.A.Legacy Books
Contatta il venditoreVenditore con 4 stelleCondizione: Usato - Molto buono
EUR 7,58
EUR 6,49 spedizioneSpedito in U.S.A.Quantità: 1 disponibili
Aggiungi al carrelloSoft cover. Condizione: Very Good. pp390-398, illustrated. Removed from AMERICAN ANTIQUITY. JOURNAL OF THE SOCIETY FOR AMERICAN ARCHAEOLOGY, Volume 48, Number 2, April, 1983. VG. In report covers. May include a first or last copied page. Synopsis: "This paper presents a critical assessment of Killingley's approach (1981) to the…determination of month of collection of marine molluscs by prehistoric people. The basis of the method is careful oxygen isotope measurements made in successive growth increments in the shells. The authors have analyzed specimens of Monodonta and Patella collected live on the coast of northern Spain, in conjunction with seasonality studies on molluscs from prehistoric sites in the neighborhood. These studies confirm the necessity of making careful analyses of each species under consideration. Given the significance both of interspecies differences and of climatic variability on timescales from a year upwards (particularly important in Killingley's area), they conclude that his apparent accuracy of (plus or minus) a month is illusory." Also includes: SEASONALITY DETERMINATION BY OXYGEN ISOTOPIC PROFILE: A REPLY TO BAILEY ET AL, by John S. Killingley, pp399-403, tables. This is the author's response to Bailey et al. Synopsis: "Profiles were measured on two species of intertidal mollusks (Tegula funebralis and Collisella limatula) to provide further evidence for the applicability of the technique to seasonality studies.".
Altre immaginiEditore: Macmillan & Sons, London, 1967
- Prima edizione
Da: Atticus Rare Books, West Branch, IA, U.S.A.Atticus Rare Books
Contatta il venditoreVenditore con 5 stelleCondizione: Usato
EUR 155,98
EUR 8,22 spedizioneSpedito in U.S.A.Quantità: 1 disponibili
Aggiungi al carrello1st Edition. BOUND FIRST EDITION, full volume, of the first tentative measurement of a CMB anisotropy, a slightly elevated temperature in the direction of a known quasar cluster. Wilkinson & Partridge's paper presents results "which appear to set rather stringent limits on the magnitude of possible density inhomogeneities in the… universe" (Wilkinson and Partridge, 1967, 719). ALSO included is Nicholas Shackleton's reassessment of Emiliani's conclusions from his 1966 analysis of the oxygen isotope ratios in Caribbean cores as an indicator of variations in total volume of glacier ice sheets. WILKINSON: "The CMB radiation is a direct relic of the early universe. It is a unique and deep probe of both the thermal history of the early universe and the primordial perturbations in the matter distribution" (Tuluie, "Cosmic Microwave Background" AJ, 1996, 15). Following "the discovery of the CMB, early work focused on putting constraints on the isotropy of the radiation field: that would be an important part of establishing its cosmological origin and would put constraints on the peculiar motion of the galaxy relative to the Local Group and the Virgo Supercluster" (ibid). Small "anistropies" (inhomogeneities in directional measurements) of temperature and polarization of the Cosmic Microwave Background radiation (CMB) allow scientists to test cosmological and astronomical theories, including cosmic inflation, the geometry of the visible universe, and the distribution of galaxy clusters. Wilkinson and Partridge's paper, again, presents the first attempt to put experimental limits on the level of anistropy. SHACKLETON: Shackleton "concludes that glacial/interglacial variations in foraminiferal oxygen isotope records were primarily influenced by changes in the oxygen isotopic composition of seawater, rather than temperature" (Ravelo, The Use of Oxygen and Carbon Isotopes, 735). CONDITION & DETAILS: London: Macmillian & Sons. Ex-libris with very minimal interior markings and ghosting from the removal of a spine label. Complete volume bound in bright red cloth with red buckram at the spine. Tightly bound and very clean. The interior is bright and exceptionally clean throughout.
