Data for 'Geomorphic inferences from regolith thickness, chemical denudation and CRN erosion rates near the glacial limit, Boulder Creek catchment and vicinity, Colorado'
收藏资源简介：
These data accompany the analysis of regolith weathering across ~940 km<sup>2</sup> of the Front Range (Colorado, USA) described by Dethier & Lazarus (2006).<br>We collected data from 1872 paper records of well-drillers' logs held on file at the Colorado Department of Water Resources (Denver office). We used every interpretable record from the Allens Park, Eldorado Springs, Gold Hill, Nederland, Tungsten, and Ward quadrangles. We recorded the thickness of overburden, alluvium, and highly weathered regolith, along with the total weathered thickness, depth to fresh bedrock, total well depth, and any drillers’ notes. We then digitized well locations (and their associated data) on topographic quadrangles in ESRI ArcMap. The maximum probable location error for any well in the dataset is the area of a 1/16 section (approximately 0.16 km<sup>2</sup>). See Dethier & Lazarus (2016) a detailed description of the methods.<br>This data file includes the following attributes:<br><b>OBJECT_ID & NEW_ID</b> (identification index)<b>WELL_NUMBE</b> (well number assigned by the Colorado Department of Water Resources)<b>POINT_X</b> (UTM Northing – NAD 1983 UTM Zone 13N)<b>POINT_Y</b> (UTM Easting – NAD 1983 UTM Zone 13N)<b>QUADRANGLE</b> (Colorado state 7.5' quadrangle)<b>TOWNSHIP</b> (township notation in quadrangle)<b>RANGE</b> (range notation in quadrangle)<b>SECTION </b>(section number in quadrangle)<b>QUARTER</b> (quarter location within QUARTER_1)<b>QUARTER_1</b> (quarter location within section)<b>OVERBURDEN & OVRBRDN_M</b> (overburden thickness, in ft & m)<b>ALLUVIAL_ & ALLUVIAL_M</b> (alluvial thickness, in ft & m)<b>HIGHLY & HIGHLY_M</b> (highly weathered thickness, in ft & m)<b>TOTAL & TOTAL_M</b> (total weathered thickness, in ft & m)<b>DEPTH & DEPTH_M</b> (depth to bedrock, in ft & m)<b>MINIMUM & MINMM_M</b> (minimum drilled well depth, in ft & m)<b>DIST_FLTS</b> (using geologic map of Colorado by Green (1992), distance to nearest fault or dike, in m)<b>DIST_STREAMS</b> (using geologic map of Colorado by Green (1992), distance to nearest third-order stream (or larger), in m)<b>ROCK_TYPE</b> (code corresponds to geologic unit in geologic map of Colorado by Green (1992): 1 = sedimentary units; 2 = Od; 3 = Ogo; 4 = Yg; 5 = Xg; 6 = Xb; 7 = Xq; 8 = Xfh; 9 = Tki; 10 = Tgv; 11 = water)<b>SLOPE</b> (approximate local slope, in degrees)<b>NOTES</b> (well drillers' notes)<br><b>REFERENCES</b>Dethier DP, Lazarus ED (2006) Geomorphic inferences from regolith thickness near the glacial limit, Boulder Creek catchment, Colorado, <i>Geomorphology</i> 75, 384–399<br>Green GN (1992) The digital geologic map of Colorado in ARC/INFO format, US Geological Survey Open-File Report 92-507.
本数据集配套支撑了由Dethier与Lazarus（2006）所描述的、美国科罗拉多州前山带（Front Range）约940平方千米区域内的风化壳（regolith）风化作用分析研究。我们从科罗拉多州水资源部（丹佛办事处）存档的1872份纸质钻井日志记录中采集数据，采用了艾伦帕克（Allens Park）、埃尔多拉德斯普林斯（Eldorado Springs）、戈尔希尔（Gold Hill）、尼德兰（Nederland）、钨矿（Tungsten）以及沃德（Ward）等7.5分幅地形图幅内所有可解析的记录。我们记录了覆盖层（overburden）、冲积层（alluvium）以及强风化风化壳的厚度，同时记录了总风化厚度、新鲜基岩埋深、总钻井深度以及所有钻井日志备注信息。随后我们在ESRI ArcMap软件中，将钻井点位（及其关联数据）数字化至对应地形幅图上。本数据集内任意钻井的最大可能点位误差为1/16区段的面积（约0.16平方千米）。有关研究方法的详细说明，请参阅Dethier与Lazarus（2016）的相关文献。 本数据文件包含以下属性字段： **OBJECT_ID 与 NEW_ID**（标识索引） **WELL_NUMBE**（科罗拉多州水资源部赋予的钻井编号） **POINT_X**（UTM北坐标——NAD 1983 UTM 13N带） **POINT_Y**（UTM东坐标——NAD 1983 UTM 13N带） **QUADRANGLE**（科罗拉多州7.5分幅地形图幅） **TOWNSHIP**（图幅内镇区编号） **RANGE**（图幅内范围编号） **SECTION**（图幅内区段编号） **QUARTER**（区段内四分之一区块位置） **QUARTER_1**（区段内四分之一区块位置） **OVERBURDEN 与 OVRBRDN_M**（覆盖层厚度，单位分别为英尺与米） **ALLUVIAL_ 与 ALLUVIAL_M**（冲积层厚度，单位分别为英尺与米） **HIGHLY 与 HIGHLY_M**（强风化风化壳厚度，单位分别为英尺与米） **TOTAL 与 TOTAL_M**（总风化厚度，单位分别为英尺与米） **DEPTH 与 DEPTH_M**（基岩埋深，单位分别为英尺与米） **MINIMUM 与 MINMM_M**（最小钻井深度，单位分别为英尺与米） **DIST_FLTS**（基于Green（1992）编制的科罗拉多州地质图，指至最近断层或岩脉的距离，单位为米） **DIST_STREAMS**（基于Green（1992）编制的科罗拉多州地质图，指至最近三级及以上溪流的距离，单位为米） **ROCK_TYPE**（编码对应Green（1992）编制的科罗拉多州地质图中的地质单元：1 = 沉积岩单元；2 = Od；3 = Ogo；4 = Yg；5 = Xg；6 = Xb；7 = Xq；8 = Xfh；9 = Tki；10 = Tgv；11 = 水体） **SLOPE**（近似局地坡度，单位为度） **NOTES**（钻井日志备注） **参考文献** Dethier DP, Lazarus ED（2006）：基于科罗拉多州博尔德溪流域冰川边界附近风化壳厚度的地貌学推断，《地貌学（Geomorphology）》，75卷，384–399页 Green GN（1992）：《ARC/INFO格式科罗拉多州数字化地质图》，美国地质调查局公开文件报告92-507。
