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The purpose of this thesis is to document the changes in archaeological origin narratives concerning the lowland Preclassic Maya. This was accomplished by tracking the changes in four major narratives over several decades. These narratives include Herbert J. Spinden's Ancient Civilizations of Mexico and Central America; The Ancient Maya written by Sylvanus G. Morley, with additional editors, George Brainerd, Robert J. Sharer, and Loa Traxler; Michael D. Coe's The Maya, and Richard E.W. Adams's Prehistoric Mesoamerica. The specific parts of the narratives analyzed were the origins of agriculture, ceramic technology, writing, and monumental architecture. Changes in metaphorical language and illustrations that accompanied these texts were also analyzed. Shifts in narratives were tracked through the changes made to the texts in sequential editions, and were then compared between editions, and between books. The analysis of these narratives showed that the changes in the narratives resulted from a number of factors, including new technology, such as radiocarbon dating; new discoveries, in the form of artwork, sites, and artifacts; the decipherment of the Maya glyphs; and changes in the field of archaeology. The largest change that archaeological research has shown that Maya civilization is older than first imagined. Writing, ceramic technology, and monumental architecture are all now known be to centuries older than previously thought, all of which require a much different narrative than first told in 1841 by John Lloyd Stephens.

The first objective of this thesis was to examine the Old Testament chronology carefully to see how it is computed. The second objective was to examine the modern scriptures to see what contributions they make in establishing a more accurate, reliable chronology. The third objective was to examine certain hypotheses in archaeology, carbon dating processes, and geology that seem to conflict with the Old Testament chronology with the purpose in mind of learning how accurate their findings are and what possibilities exist for a closer harmony between these sciences and the Old Testament scriptural chronology.

Doctorat en philosophie et lettres / info:eu-repo/semantics/nonPublished

Peat from the temperate regions has been used for paleoenvironmental reconstruction using diverse proxies for over a century now. Peat is rare and severely understudied in the tropics. The montane peat bogs of the Nilgiris, southern India have been found to preserve global climatic signals including the Holocene Optimum and the Last Glacial Maximum (LGM). At Sandynallah, one of the oldest peat accumulations in the world at >40 kyr BP, we had undertaken a high resolution paleoenvironmental reconstruction using multiple proxies which are yet to be evaluated in the tropical context. The study consists of 3 main objectives, i. Establishing an accurate high resolution chronology for the peat profile using radiocarbon dating, ii. Extracting vegetation and climate information from C/N ratio and Rock-Eval indices and iii. Using elemental profiles to establish the utility of inorganic geochemical proxies for processes such as weathering and dust transport. High resolution chronology for the site was built using Accelerator Mass Spectrometry (AMS) radiocarbon dates. To improve accuracy of the age-depth model, we also tested 4 samples for the effects of the AAA (Acid-Alkali-Acid) extraction method, the most common pre-treatment method for peat in the world. We compared ages on bulk samples (acid washed) and AAA treated samples from 4 different depths. We find that for all depths, the ages of the untreated samples do not lie within the internal uncertainty window and differ from the AAA treated sample age by at least an order of magnitude of the internal error, if not more. Based on these results we argue that the internal error should be used in conjunction with a reliable estimate of external error in an age-depth model for more realistic dating of paleoclimatic events. C/N ratios were explored for their paleoclimatic potential in conjunction with Rock-Eval indices and it was found that decomposition in tropical peat, as opposed to temperate peat, may not be sensitive to climatic perturbations. Inorganic geochemical proxies were also evaluated through this study. We see that the major and trace elements, except the lanthanide series do not show many significant trends for paleoenvironmental interpretation. But the lanthanides show some promise for identifying potential sources of dust and weathered material. Our study has addressed the gap in knowledge about the utility of recent geochemical proxies in tropical peat and has attempted to provide a solution to improve reliability in constructing age-depth models.

Chronology, Identity, Urbanism and State in the Central and South Central Andes between V and X Centuries AD: Some Final ConclusionsThe article doesn´t have an abstract / El artículo no presenta resumen

To preserve multi-centennial length variability in annual tree-ring chronologies, the Regional Curve Standardization (RCS) method calculates anomalies from a regionally common, non-climatic age-trend function. The influence of various factors on the estimation of the regional curve (RC) and resulting RCS- chronology is discussed. These factors are: the method of calculating anomalies from the age-trend function, estimation of the true pith offset, the number of series used, species composition, and site characteristics. By applying RCS to a collection of millennium-length tree-ring data sets, the potential and limitations of the RCS method are investigated. RCS is found to be reasonably robust with respect to tested factors, suggesting the method is a suitable tool for preserving low-frequency variance in long tree-ring chronologies.

We developed a network of tree-ring width chronologies of larch (Larix sibirica Led.) from upper tree-lines of the southeast Altai Mountains, South Siberia. Annual tree-ring variability of chronologies since A.D. 1710 was compared using factor analysis. The factor analysis clustered eight tree-ring chronologies into two groups that were used for compositing chronologies. One resulting composite chronology (A.D. 1582-1994) averaged sites from upper tree-lines in glacier-free areas and another chronology (A.D. 1090-1999) captured the sites at upper tree-lines in valleys of the Korumdu, Aktru, Yan-Karasu and Kizil-Tash Glaciers (North-Chuya Range). There is no significant difference in the estimated strength of temperature signals (June and July) of the composite chronologies. However, we observed a remarkable contrast in the decadal variability of larch growth between upper tree-lines of glacier-free areas and glacier valleys. The tree-ring growth of larch was coherent among the chronologies for the period A.D. 1582-1725. Suddenly, low-frequency similarity declined around A.D. 1730. The magnitude of differences became more pronounced after A.D. 1775 indicating three periods with opposite growth tendency (1775-1850, 1900-1915 and 1960-1994) that alternated with short periods of coherent growth. We assume that the low-frequency signal in the glacier valley larch chronology accommodates oscillations of both summer temperature and glacier dynamics. The periods of low-frequency departures are consistent with the 19th Century advance and tremendous 20th Century retreat of the glaciers. We argue that expanded glaciers enhance harmful impacts of katabatic wind on larch growth. It appears that employing tree rings from upper tree-lines of glaciated areas for estimation of decadal and centennial variability climatic proxies should be selected with great caution.

Seventeen glacially sheared stumps in growth position and abundant detrital wood fragments were exposed by stream avulsion at the terminus of the Saskatchewan Glacier in 1999. The stumps lay buried beneath the glacier and over 5 m of glacial sediment until historical recession and stream incision exposed the 225- to 262-year-old stand of subalpine fir, Englemann spruce and whitebark pine trees. Crossdating and construction of two radiocarbon-controlled floating tree-ring chronologies showed that all the subfossil stumps and boles exposed at this location were killed during a Neoglacial advance of the Saskatchewan Glacier 2,910 ± 60 to 2,730 ± 60 ¹⁴C years B.P. These findings support the Peyto Advance as a regional glaciological response to changing mass balance conditions.

Les premières civilisations péruviennes se sont épanouies pendant la période dite « formative » entre 2500 av. J.-C. et le début de notre ère. Les connaissances actuelles sur le Formatif et les cultures Cupisnique ou Chavín ont été largement influencées par les théories évolutionnistes et diffusionnistes héritées du XIXe siècle. Ce travail de recherche répond à la nécessité d’opérer une synthèse réactualisée de cette période mal connue et de redéfinir le premier horizon culturel communément appelé Chavín. D’une part, cette étude propose un cadre chronologique fondé sur la réévaluation systématique des séquences chrono-culturelles de l’ensemble des sites archéologiques occupés à cette époque. Elle établit une périodisation du Formatif et détermine les principaux groupes culturels qui caractérisent ses différentes étapes. D’autre part, ce travail apporte une réflexion épistémologique sur les concepts Cupisnique et Chavín. L’Horizon Chavín, traditionnellement défini comme le résultat de la diffusion stylistique de l’art religieux de Chavín de Huántar, est ici réinterprété au regard des données récentes de la recherche archéologique et d’une analyse approfondie des données chronologiques et culturelles des centres cérémoniels les plus importants. Cette étude précise enfin le rôle majeur que les sites de tradition culturelle Cupisnique et le temple de Chavín de Huántar ont joué dans l’élaboration et la mise en place de concepts religieux communs transcrits dans une écriture iconographique codifiée. / Early Peruvian civilisations were flourishing during the period called « Formative » between 2500 BC and the beginning of our era. The current knowledge of Formative and Cupisnique or Chavín cultures has been considerably influenced by evolutionist and diffusionist theories inherited from the nineteenth century. This research attempts to meet the necessity of realising an updated synthesis of this almost unknown period and to redefine the first cultural horizon usually called Chavín. On the one hand, this study proposes a chronological frame based on systematic revaluation of the chrono-cultural sequences of all the archaeological sites of this period. It sets out a chronology of the Formative cultures and determines the main cultural groups which characterise its different stages.On the other hand, this work offers an epistemological thought on Cupisnique and Chavín cultures. Chavín Horizon, traditionally defined as the result of the stylistic diffusion of Chavín de Huántar religious art is re-interpreted in the light of recent archaeological data collected in the main ceremonial centers. Finally, this dissertation makes clear the major role that Cupisnique sites and Chavín de Huántar temple have had in the creation and the development of shared religious concepts transcribed in a codified iconographic writing.