Hymera Coal Member Elevation 2014

In the past a series of reports on coal resources of selected counties in Indiana were published as part of the Special Report series of the Indiana Geological Survey. These reports included maps showing extent of the Hymera Coal Member (Dugger Formation, Pennsylvanian). The extent maps were based on coal-test records, mine-map notations, and interpretations of geophysical logs that are included in the files of the Indiana Geological Survey. Since 1980, staff members of the Indiana Geological Survey (IGS) have also collected and entered coal resource information into the NCRDS Database as a cooperative project with the U.S. Geological Survey (USGS). The purpose of NCRDS Database is to provide a means of rapid retrieval of point-source coal resource information, including coal location, extent, and other parameters. Based on all available NCRDS data and data provided by Phil Ames from the Peabody Coal Company as of April 2014, a new map of Hymera Coal Member extent was created. It is the most current extent map of the Hymera Coal Member. Because additional data on coal extent are obtained by the Indiana Geological Survey on an annual basis, interested users may wish to contact the IGS for information on these more up-to-date sources.此前，印第安纳州地质调查局（Indiana Geological Survey，IGS）特刊系列中曾刊发一系列针对印第安纳州部分县域煤炭资源的研究报告。这些报告附带了展示海默拉煤段（宾夕法尼亚系达格组）分布范围的地图，其编制依据为该局档案中留存的煤炭勘探记录、矿图标注以及地球物理测井解释成果。自1980年起，印第安纳州地质调查局（IGS）工作人员与美国地质调查局（USGS）合作开展项目，将收集到的煤炭资源信息录入NCRDS数据库（NCRDS Database）。该数据库旨在实现点源煤炭资源信息的快速检索，涵盖煤炭点位、分布范围及其他相关参数。基于截至2014年4月可获取的全部NCRDS数据库数据，以及皮博迪煤炭公司（Peabody Coal Company）菲尔·艾姆斯（Phil Ames）提供的相关数据，研究团队编制了全新的海默拉煤段分布范围地图，这也是当前最新的该煤段分布范围图。由于印第安纳州地质调查局每年都会获取新的煤炭分布范围数据，有需求的用户可联系IGS获取此类最新数据源的相关信息。