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首页> 外文期刊>Geoarchaeology >Holocene Alluvial Sequences, Cumulic Soils and Fire Signatures in the Middle Rio Puerco Basin at Guadalupe Ruin,New Mexico
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Holocene Alluvial Sequences, Cumulic Soils and Fire Signatures in the Middle Rio Puerco Basin at Guadalupe Ruin,New Mexico

机译:新墨西哥瓜达卢佩遗址里约中部普尔科盆地全新世冲积层序,累积土壤和火势特征

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We describe a geoarchaeological survey of a 5-km reach of the Rio Puerco channel and itstributaries, centered on the Guadalupe Ruin, a pueblo of the late 10th-12th centuries A.D.in north-central New Mexico, with associated pollen, charcoal, micromorphological, andradiocarbon analyses. Severe erosion has drastically bisected the Puerco valley with four pri-mary arroyos entering the western side of the Guadalupe reach of the valley: Tapia, Salado,Guadalupe and "No Name." We recorded an 11-m-tall alluvial sequence marked by fourphases of cumulic soil development, interrupted by six major periods of channel entrench-ment that occurred at about 4100-3700 B.C. and 2900-2400 B.C., between 2200 B.C. and ca.A.D. 400, pre- and post-ca. A.D. 900-1300, and in the late A.D. 1800s. Relative floodplainstability and associated cumulic soil development occurred prior to ca. 5700 B.C., betweenca. 2600 to 2200 B.C. and A.D. 350 and 550, and ca. A.D. 900-1300. Multiple signatures of fires(oxidized sediment and charcoal) were observed in the Arroyo Tapia tributary sequence,especially in deposits dated ca. 6000 and 2600 B.C. These fires may have helped toenhance food resources for game animals by encouraging grass and shrub growth and/orto increase the growth of wild plants and eventually cultigens such as maize. Palynologicalevidence of maize in the Arroyo Tapia, dated ca. 2600-2200 B.C. may be the earliest thus faridentified in the Southwest.
机译:我们描述了以新墨西哥州中北部10至12世纪晚期的一个镇瓜达卢佩遗址为中心的里奥普尔科海峡及其分支5公里范围的地质考古调查,以及相关的花粉,木炭,微观形态,和放射性碳分析。严重的侵蚀将普埃科河谷一分为二,其中有四个主要的阿罗约人进入瓜达卢佩河谷的西侧,即塔皮亚,萨拉多,瓜达卢佩河和“无名”。我们记录了一个11米高的冲积层序,其标志着累积土壤发展的四个阶段,并在大约公元前4100年至3700年间发生了六个主要的通道陷时期。公元前2200年至公元前2900年至2400年之间和公元ca前后的400。公元900-1300年,以及公元1800年代后期。相对洪泛区的不稳定性和相关的累积土壤发展发生在约。约公元前5700年公元前2600至2200年和公元350和550,以及公元900-1300年。在Arroyo Tapia支流序列中观察到了火灾的多种特征(氧化的沉积物和木炭),尤其是在约2年前的沉积物中。公元前6000年和2600年这些火灾可能通过鼓励草和灌木的生长和/或增加了野生植物的生长,并最终促进了诸如玉米的栽培,从而帮助增强了游戏动物的食物资源。 Arroyo Tapia中玉米的孢粉学证据,日期约为。公元前2600年至2200年可能是迄今在西南地区最早发现的。

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