ESH: Late Quaternary Paleoenvironmental Record of Small Playa-Basins on the Southern High Plains

9807347霍利迪拟议的研究是晚第四纪古环境记录保存在小干盐湖盆地的南部高平原的西北德克萨斯州和东部新墨西哥州的调查。 该项目的目的是更好地了解：1）晚更新世冷干环境向冷湿环境的演变：2）更新世最后一千年和全新世早期冷湿环境向暖干环境的快速反复转换;第三章环境变化的速度和时间导致了相对干燥和温暖的气候，这是早期和中期的特点。全新世; 4）全新世近几千年来环境向干旱化的快速反复偏离。 对干盐湖充填物的初步调查表明，它们具有跨越晚第四纪的可测日期的连续沉积记录，并且它们包含沉积物本身形式的古环境指标，以及稳定碳同位素和植硅石。 在田野里收集的作品。 这项研究将为大平原景观的重要组成部分的年龄和起源提供线索。 更具体地说，这些研究将有助于了解晚第四纪的南部高平原，一个已知的地区是敏感的环境变化，环境波动的区域意义，以及高平原景观对这些变化的响应的环境演变。 因此，拟议的研究将补充，更重要的是，加强和显着扩大晚第四纪古环境记录的景观演变和对环境变化的响应

9807347HollidayThe proposed research is an investigation of the late Quaternary paleoenvironmental record preserved in the small playa basins on the Southern High Plains of northwestern Texas and eastern New Mexico. The goals of this project are to better understand: 1) cool-dry environments evolving into cool-moist ones in the late Pleistocene; 2) rapid and repeated shifts between cool-moist and warm-dry environments in the last millennia of the Pleistocene and early millennia of the Holocene; 3) the rate and timing of the environmental changes that resulted in the relatively dry and warm climate that characterized much of the early and middle Holocene; and 4) rapid and repeated environmental departures toward aridity in the past few millennia of the Holocene. Preliminary investigations of playa fills indicate that they have dateable, continuous records of sedimentation spanning the late Quaternary, and that they contain paleoenvironmental indicators in the form of the sediments themselves, and also stable-carbon isotopes and phytoliths. The work collected in the field. The research will provide clues to the age and origin of a significant component of the Great Plains landscape. More specifically, the studies will help in understanding the late Quaternary evolution of the environment of the Southern High Plains, a region known to be sensitive to environmental changes, the regional significance of environmental fluctuations, and the response of the High Plains landscape to these shifts. The proposed research, therefore, will complement and, more importantly, strengthen and significantly expand the late-Quaternary paleoenvironmental record of landscape evolution and response to environmental change