Pre-Woodfordian Paleosols in Indiana

这项研究的重点是印第安纳州伍德福期以前的古土壤的详细地质-土壤学特征，重点是桑加蒙土壤。还将对桑加马以前的古土壤进行调查。虽然在印第安纳州有许多优秀的泡桐土暴露，但全面的描述和描述是罕见的，特别是从土壤学的角度来看，除了在该州的西南部。与伊利诺伊州和爱荷华州等其他中西部州相比，印第安纳州对古土壤的了解要少得多。然而，该州的地理位置很好，因此拟议的研究可以包括不同母质、不同地形下形成的古土壤，从而包括排水、条件(古地形)以及尽可能大的纬度范围，以便可能评估由于古气候造成的差异。在我们对中部大陆厚土壤的了解的背景下，这项研究应该有助于理解与土壤学历史有关的沉积学和侵蚀史，特别是经常以岩性和/或土性间断为标志的“两层”或“多层”古土壤。还应考虑成岩作用的影响、冰川/间冰期界线的界定和地层对比、古土壤的相对发育程度以及废物处理设施选址等应用。这项研究的目标将通过实地调查、实验室分析和年代测定相结合的方式实现。所有调查都将在土壤剖面的背景下进行。

The study focuses on detailed geological-pedological characterization of the pre-Woodfordian paleosols in Indiana, with emphasis on the Sangamon Soil. Pre-Sangamonian paleosols will also be investigated. Although there are numerous excellent exposures of paeosols in Indiana, comprehensive descriptions and characterizations are uncommon, especially from a pedological viewpoint, except in the southwestern part of the state. Far less is known about paleosols in Indiana than in other midwestern states such as Illinois and Iowa. However, the state is geologically well located so that the proposed study can include paleosols developed from different parent materials, under different topographic, and therefore drainage, conditions (paleocatenas), and over as great a range of latitude as possible, in order to possibly evaluate differences due to paleoclimate. In the context of our knowledge of paeosols in the midcontinent, the study should contribute to understanding of sedimentological and erosional histories with respect to pedological history, especially in "two-story" or "multiple- story" paleosols often marked by lithologic and/or pedologic discontinuities. Also to be considered are the effects of diagenesis, definition of glacial/interglacial boundaries and stratigraphic correlation, relative degrees of development of paleosols, and applications such as the siting of waste-disposal facilities. The objectives of the study will be achieved through a combination of field investigation, laboratory analysis, and dating. All investigations will be conducted in the context of the soil profile.