POLLEN ANALYSIS AT AZ:AA:12:869

Site AZ AA:12:869(ASM) includes a prehistoric canal. This Colonial Hohokam site yielded
a radiocarbon age of AD 880 to 970 (one-sigma calibration) near the top of the canal and an age
of AD 780 to 900 and AD 790 to 900 (one-sigma calibration) near the bottom of the canal. This
canal came off the Rillto River. Pollen samples were examined from the modern surface in a fallow
cotton field, and from the prehistoric canal beneath a large sherd and under a mano fragment.
Pollen analysis was conducted to examine this canal for possible evidence of agriculture associated
with the Colonial Hohokam occupation.

Three pollen samples collected from a prehistoric canal at AZ AA: 12:869(ASM) were
examined for pollen to identify evidence of agriculture and to describe local vegetation.

遗址AZ AA:12:869(ASM) 内留存有一处史前渠道。该殖民时期霍霍坎（Colonial Hohokam）遗址中，渠道顶部附近的样品经单西格玛校准（one-sigma calibration）后得到的放射性碳年代（radiocarbon age）为公元880年至970年；渠道底部附近的两个样品则分别得到公元780年至900年、公元790年至900年的定年结果（均为单西格玛校准）。该渠道引自里尔托河（Rillto River）。研究人员从一处休耕棉田的现代表层土壤，以及史前渠道内一块大型陶片（large sherd）下方和一件手磨（mano）碎片下方的沉积层中采集了花粉样本。本次花粉分析旨在检测该渠道中与殖民时期霍霍坎先民定居活动相关的农业活动痕迹。

本次研究共采集了遗址AZ AA:12:869(ASM) 内史前渠道中的三份花粉样本，通过花粉鉴定以识别农业活动痕迹，并对当地植被状况进行描述。