Collaborative Research: The Extension of a Dendrochronological Sequence to Northern Mesoamerica

合作研究：树木年代序列向中美洲北部的延伸

• 批准号: 1755504
• 负责人: Paula Turkon
• 金额: $ 9.85万
• 依托单位: Ithaca College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-05-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1755504&HistoricalAwards=false
• 关键词: Collaborative; Research; Extension; Dendrochronological; Sequence

Drs. Paula Turkon, Sturt Manning, and Carol Griggs, along with colleagues from Mexico, will conduct research to provide a high-resolution absolute tree-ring chronology for Northern Mesoamerican archaeological sites using a combination of tree-ring and AMS radiocarbon data. This project extends their preliminary research both geographically and chronologically, with the goal of linking the existing Epiclassic chronology from Northwestern Mesoamerica that ends in the 8th century A.D., to the regionally extensive, calendar-dated chronologies from living and relic trees in the same region. The dendrochronological results will offer dating precision to archaeologists working in these regions for time periods that do not have written sources of chronological data. It will also establish the foundation for climate reconstruction studies that, in the future, will help clarify the long-term relationships between the magnitude of climatic change and human response. In fostering close collaboration between archaeologists, dendrochronologists, graduate, and undergraduate students from multiple institutions throughout Mexico and the United States, this project's mission is to encourage the application of dendroarchaeology [=archaeological dendrochronology], currently not part of archaeological fieldwork or analysis in Mexico. Mesoamerican archaeologists have long acknowledged the need for precise dating methods in order to understand cultural change, particularly in the region north of the core of Mesoamerican culture. Yet despite tremendous success in the development of tree-ring dating of archaeological sites just north in the American Southwest, and the more recent development of long tree-ring chronologies in Mexico that cover the past 1300 years, dendroarchaeology has been virtually absent in Mesoamerica. The first stage of this NSF funded project demonstrated the availability, measurability, and similarities in growth patterns ("crossdatability") of archaeological tree-ring samples in Northwestern Mesoamerica from the 5th to 8th centuries A.D. In this second stage, the researchers will incorporate archaeological samples from Postclassic and historic sites located in a broader geographic region in northern Mesoamerica. Because the new archaeological collections of wood will likewise be from a time period for which there are no well-established master chronologies, the tree-ring sequences produced from the prehispanic sites will be initially anchored in time by "radiocarbon wiggle-matching." This method fits a known relative sequence of radiocarbon dates from specific tree-rings against the radiocarbon calibration curve to achieve a precise fit and thus calendar placement with minimal error. Ultimately, we intend to create a continuous tree-ring record from the present back to the Classic period, using both the archaeological and historic collections, as well as existing calendar-dated chronologies. The resulting data will not only fill a significant gap in our knowledge of the chronology of Northern Mesoamerica, but help address broader questions such as the rate, timing, and directionality of cultural influences with the Mesoamerican cultural core. Since dendroarchaeological methods are cumulative and iterative, the chronologies will gain in length, sample depth, and robustness, and will become increasingly useful to archaeologists working in broader geographic regions and time periods.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

博士。 Paula Turkon，Sturt Manning和Carol Griggs以及来自墨西哥的同事将进行研究，以使用树环和AMS放射性碳数据的组合为北部中美洲考古地点提供高分辨率的绝对树环时间类。 该项目在地理和时间顺序上扩展了他们的初步研究，其目的是将现有的Epiclassic年代学连接到公元8世纪的西北中美洲，与公元8世纪结束的地区，与当地广泛的日历日期日期的年代相同。 Dendrosological的结果将为在没有书面数据的书面资源的时间段中在这些地区工作的考古学家提供约会精度。它还将建立气候重建研究的基础，将来将有助于阐明气候变化与人类反应的长期关系。为了促进来自墨西哥和美国多个机构的考古学家，神经学家，毕业生和本科生之间的密切合作，该项目的使命是鼓励在墨西哥的古老现场工作或分析的一部分，鼓励采用DendroArchogology [=考古树枝状学院]。中美洲考古学家长期以来已经承认需要精确的约会方法，以了解文化变革，尤其是在中美洲文化核心以北的地区。然而，尽管在美国西南部北部的考古遗址的树木环长发展方面取得了巨大的成功，以及涵盖过去1300年的墨西哥长林月表的最新发展，但在中美洲实际上已经没有Dendrohapeology。该NSF资助的项目的第一阶段证明了西北中美洲的考古树环样本的增长模式（“ CrossDatibal”）的可用性，可衡量性和相似性，从公元5到8世纪。由于木材的新考古集合也将是从没有完善的主时间表的时间段，因此最初是通过“放射性碳纤维匹配”来暂时固定在及时的。 该方法拟合了从特定的树环与放射性碳校准曲线的已知相对序列，以实现精确的拟合，从而获得日历放置，而误差最小。 最终，我们打算使用考古学和历史性收藏以及现有的日历日期记录来创建从当前回到经典时期的连续树环记录。 最终的数据不仅会填补我们对北部中美洲北部年代学的了解，而且有助于解决更广泛的问题，例如使用中美洲文化核心的文化影响的速度，时机和方向性。由于累积性和迭代性是累积性和迭代性的，因此年代学将获得长度，样本深度和鲁棒性，并且对于在更广泛的地理区域和时间段内工作的考古学家将变得越来越有用。这一奖项反映了NSF的法规使命，并认为通过基金会的知识优点和广泛的critia criter scritia criter criteria criteria criter criteria criteria criteria criteria criteria criteria crietia crietia crietia crietia均值得通过评估。