Colchester 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 Colchester Coal Member (Linton 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 August 2014, a new map of Colchester Coal Member extent was created. It is the most current extent map of the Colchester 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）特刊系列曾出版多份针对印第安纳州部分县域煤炭资源的研究报告。此类报告附有标注科尔切斯特煤段（林顿组，宾夕法尼亚系）分布范围的地图，该类地图的编制依据为该局档案中收录的煤炭勘探记录、矿图标注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（Indiana Geological Survey, IGS）工作人员与美国地质调查局（U.S. Geological Survey, USGS）合作开展项目，将采集到的煤炭资源信息录入NCRDS数据库；该数据库的设计目标为实现点源型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。截至2014年8月，研究团队基于所有可用的NCRDS数据以及皮博迪煤炭公司（Peabody Coal Company）菲尔·埃姆斯（Phil Ames）提供的数据集，编制完成全新的科尔切斯特煤段分布范围地图，此为当前最新的科尔切斯特煤段分布范围图件。鉴于印第安纳州地质调查局每年都会新增煤炭分布范围相关数据，有需求的用户可联系IGS获取此类最新数据源的相关信息。