Column name Column definition (Note: all column names ending in "J" originated from J. Dyni's original tops file) ID Software-calculated identifier USGSIDJ Unique ID assigned by staff geologist CMPNYPROJJ Name of the company or agency that drilled the borehole NAMEJ Name of the borehole assigned by the company or agency that drilled it EASTWESTJ Distance in feet measured east or west from section line NORSOUJ Distance in feet measured north or south from section line QQJ Quarter-quarter section RANGEJ Range SECJ Section TWPJ Township LATDDJ Latitude in decimal degrees, North American Datum 1927, original record LONGDDJ Longitude in decimal degrees, North American Datum 1927, original record LOCSRCJ Source of the borehole location, usually from the Fischer assay file, geophysical log, lithologic log, or survey COUNTYJ Name of county in Colorado ELEVFTJ A borehole reference elevation, such as ground surface, rotary bushing, or rotary table, from which down hole depths were measured COREDINTVJ Depths, in feet, of the sequence that was cored in the borehole ELEVSRCJ Source of elevation, usually from the Fischer assay file, geophysical log, lithologic log, topo or survey TOTDEPTFTJ Total depth of the borehole, in feet QUADJ Name of 7.5-minute USGS topographic map, borehole may or may not be shown on map ARCHIVEDJ Core archived yes or no YRDRILLEDJ Year that the borehole was drilled LOCCOREJ Physical location of the core from core hole, for example, USGS Core Research Center SHOWNMAPJ Indicates whether the actual borehole location is shown on the topographic map LITHFTJ Top and bottom borehole depths, in feet, of sequence of core or rotary cuttings for which a lithologic log was prepared PHOTOFTJ Top and bottom borehole depths, in feet, of photographic record of drill core ELECFTJ Top and bottom depths, in feet, of electric log of borehole GAMMAFTJ Top and bottom depths, in feet, of gamma ray log of borehole DENSFTJ Top and bottom depths, in feet, of density log of borehole SONICFTJ Top and bottom depths, in feet, of sonic log of borehole NEUTRONFTJ Top and bottom depths, in feet, of neutron log of borehole CALIPERFTJ Top and bottom depths, in feet, of caliper log of borehole RQDFTJ Top and bottom borehole depths, in feet, of rock quality data log TEMPFTJ Top and bottom depths, in feet, of temperature log of borehole OTHERLOGSJ Top and bottom depths, in feet, of other geophysical logs FISCHASSYJ Top and bottom depths, in feet, of sequence analyzed by Fischer assays LABJ Name of laboratory where Fischer assays were performed ALUMINAFTJ Top and bottom depths, in feet, of sequence analyzed for alumina NUMBASSYSJ Number of Fischer assays that were made USBMNUMBRJ A number assigned to the report of Fischer assays made by the former U.S. Bureau of Mines LOCATNOTEJ Additional information, commonly used where there is a problem with the location NAHCOLTFTJ Top and bottom depths, in feet, of sequence analyzed for nahcolite XRDFTJ Top and bottom depths, in feet, of X-ray diffraction analyses made on samples from the borehole ELEVNOTEJ Additional information, commonly used where there is a problem with the elevation MISCNOTEJ Miscellaneous information, such as publications related to the borehole, and other data REVISDATEJ Date of last revision for original borehole data NAME Name of the borehole assigned by the company or agency that drilled it TRSEC Township, range, and section EASTWEST Distance in feet measured east or west from section line NORSOU Distance in feet measured north or south from section line LATDD Latitude in decimal degrees, North American Datum 1927, software-calculated, this report (2009) LONGDD Longitude in decimal degrees, North American Datum 1927, software-calculated, this report (2009) ELEVFT A borehole reference elevation, such as ground surface, rotary bushing, or rotary table, from which down hole depths were measured CHDH Core hole or drill hole ELEVDATUM Elevation, in feet, for various reference surfaces including Kelly bushing, ground level, topographic map, and rotary table USGSID Unique ID assigned by staff geologist JD76 Depth to top of Bed 76, in feet JD74 Depth to top of Bed 74, in feet JD72 Depth to top of Bed 72, in feet JDTPPORCTF Depth to top of Porcupine Creek tuff, in feet JDBSPORCTF Depth to base of Porcupine Creek tuff, in feet JD70 Depth to top of Bed 70, in feet JD68 Depth to top of Bed 68, in feet JD67 Depth to top of Bed 67, in feet JD66 Depth to top of Bed 67, in feet JD64 Depth to top of Bed 64, in feet JD62 Depth to top of Bed 62, in feet JD60 Depth to top of Bed 60, in feet JD58 Depth to top of Bed 58, in feet JD56 Depth to top of Bed 56, in feet JD54 Depth to top of Bed 54, in feet JD52 Depth to top of Bed 52, in feet JD50 Depth to top of Bed 50, in feet JD48 Depth to top of Bed 48, in feet JD46 Depth to top of Bed 46, in feet JD44BIG3 Depth to top of Bed 44 of Big 3 oil shale beds, in feet JD42BIG3 Depth to top of Bed 42 of Big 3 oil shale beds, in feet JD40BIG3 Depth to top of Bed 40 of Big 3 oil shale beds, in feet JD39 Depth to top of Bed 39, in feet JD38STLWTR Depth to top of Stillwater zone, in feet JD37 Depth to top of Bed 37, in feet JD36A Depth to top of Bed 36A, in feet JD36 Depth to top of Bed 36, in feet JD34 Depth to top of Bed 36, in feet JD32FRSENR Depth to top of Bed 32 of the Four Senators, in feet JD30 Depth to top of Bed 30 of the Four Senators, in feet JD28FRSENR Depth to top of Bed 28 of the Four Senators, in feet JD26 Depth to top of Bed 26 of the Four Senators, in feet JD25 Depth to top of Bed 25, in feet JD24 Depth to top of Bed 24, in feet JD22 Depth to top of Bed 22, in feet JD21 Depth to top of Bed 21, in feet JD20 Depth to top of Bed 20, in feet JD18 Depth to top of Bed 18, in feet JD16 Depth to top of Bed 16, in feet JD14 Depth to top of Bed 14, in feet OTPUPWAVY Depth to top of Upper Wavy, in feet OBSUPWAVY Depth to base of Upper Wavy, in feet JD12 Depth to top of Bed 12, in feet JD10 Depth to top of Bed 10, in feet JD08 Depth to top of Bed 8, in feet JD06 Depth to top of Bed 6, in feet JD04 Depth to top of Bed 4, in feet JD02 Depth to top of Bed 2, in feet JDAGROOV Depth to top of A Groove, in feet JDMAHOGZN Depth to top of Mahogany Zone, in feet (space holder, not used in this assessment) OMAHOGZN Depth to top of Mahogany Zone, in feet JDTPMAHOG Depth to top of Mahogany Bed (Donnell, USGS), in feet (space holder, not used in this assessment) OMAHOG Depth to top of Mahogany Bed (Johnson, USGS), in feet JDBGROOV Depth to top of B Groove, in feet JDR6 Depth to top of R6 Zone, in feet JDL5 Depth to top of L5 Zone, in feet JDR5 Depth to top of R5 Zone, in feet JDL4 Depth to top of L4 Zone, in feet JDR4 Depth to top of R4 Zone, in feet JDL3 Depth to top of L3 Zone, in feet JDR3 Depth to top of R3 Zone, in feet JDL2 Depth to top of L2 Zone, in feet R2 Depth to top of R2 Zone, in feet L1 Depth to top of L1 Zone, in feet R1 Depth to top of R1 Zone, in feet CLASTCR1TP Depth to top of clastic wedge in R-1 zone, in feet CLASTCR1BS Depth to base of clastic wedge in R-1 zone, in feet L0 Depth to top of L0 Zone, in feet R0 Depth to top of R0 Zone, in feet LPBS Depth to base of Long Point, in feet BMARKRTP Depth to top of B Marker, in feet BMARKRBS Depth to base of B Marker, in feet(space holder, not used in this assessment) CMARKRTP Depth to top of C Marker, in feet CMARKRBS Depth to base of C Marker, in feet(space holder, not used in this assessment) DMARKRTP Depth to top of D Marker, in feet DMARKRBS Depth to base of D Marker, in feet(space holder, not used in this assessment) FMARKR Depth to top of F Marker, in feet IMARKR Depth to top of I Marker, in feet TOPILES Depth to top of Iles, in feet TOPKMV Depth to top of Kmv, in feet TOPRLNS Depth to top of Rollins, in feet TOPCSGT Depth to top of Castlegate, in feet MHG2BGRV Thickness of interval from the Mahogany bed to B Groove, in feet MHGZN2BGRV Thickness of interval from the Mahogany zone to B Groove, in feet BGRV2R6 Thickness of interval from B Groove to the R6 zone, in feet R62L5 Thickness of interval from R6 to the L5 zone, in feet L52R5 Thickness of interval from L5 to the R5 zone, in feet R52L4 Thickness of interval from R5 to the L4 zone, in feet L42R4 Thickness of interval from L4 to the R4 zone, in feet R42L3 Thickness of interval from R4 to the L3 zone, in feet L32R3 Thickness of interval from L3 to the R3 zone, in feet R32L2 Thickness of interval from R3 to the L2 zone, in feet L22R2 Thickness of interval from L2 to the R2 zone, in feet R22L1 Thickness of interval from R2 to the L1 zone, in feet L12R1 Thickness of interval from L1 to the R1 zone, in feet R12L0 Thickness of interval from R1 to the L0 zone, in feet L02R0 Thickness of interval from L0 to the R0 zone, in feet R02LPBS Thickness of interval from R0 to the Long Point base, in feet AGRV2MHGZN Thickness of interval from A Groove to the Mahogany zone, in feet B442AGRV Thickness of interval from Bed 44 to A Groove, in feet MGBS2R5 Thickness of interval from the Mahogany zone base to the R5 zone, in feet R52LPBS Thickness of interval from R5 to the Long Point base, in feet JD762JD44 Thickness of interval from bed 76 to bed 44, in feet