1. Abstract This geologic map was prepared as a part of a study of digital methods and techniques as applied to complex geologic maps. The geologic map was digitized from the original scribe sheets used to prepare the published Geologic Map of Colorado (Tweto 1979). Consequently the digital version is at 1:500,000 scale using the Lambert Conformal Conic map projection parameters of the state base map. Stable base contact prints of the scribe sheets were scanned on a Tektronix 4991 digital scanner. The scanner automatically converts the scanned image to an ASCII vector format. These vectors were transferred to a VAX minicomputer, where they were then loaded into ARC/INFO. Each vector and polygon was given attributes derived from the original 1979 geologic map. This database was developed on a MicroVAX computer system using VAX V 5.4 nd ARC/INFO 5.0 software. UPDATE: April 1995, The update was done solely for the purpose of adding the abilitly to plot to an HP650c plotter. Two new ARC/INFO plot AMLs along with a lineset and shadeset for the HP650C design jet printer have been included. These new files are COLORADO.650, INDEX.650, TWETOLIN.E00 and TWETOSHD.E00. These files were created on a UNIX platform with ARC/INFO 6.1.2. Updated versions of INDEX.E00, CONTACT.E00, LINE.E00, DECO.E00 and BORDER.E00 files that included the newly defined HP650c items are also included. * Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Descriptors: The Digital Geologic Map of Colorado in ARC/INFO Format Open-File Report 92-0507 2. Applications that use this data models and assesments 2.1 Intended use of data base geologic map 2.2 Limitations of data Scale is 1:500,000 and should not be used outside that range WATER, ROADS, CONTOURS, AND TOWNS: Published geologic maps are prepared using a USGS topographic base map that contains the hydrology, hypsography, and political features. Because this digital version of the Geologic Map of Wyoming started with the original geologic scribe sheets, these features were not present. Only those water bodies that were required to close polygons were added by hand. The digital hydrology is not complete or as accurate as the original USGS 1:500,000 topographic base. A few water bodies were added for visual effect. No roads, contours, or towns were present on the geologic scribe sheets and none were added to this digital version. 3. Attribute discussion CODING SCHEME FOR ATTRIBUTES: ITEM FEATURE P1,P2 Shorthand attributes BW Line pattern from CARTO.LIN CCA Line pattern or shade color from CCA.LIN or CCA.SHD CCB Shade color from CCB.SHD PATT Shade pattern from DOT.SHD HP Line pattern or shade color from TWETO.LIN or TWETO.SHD MAJOR1 DLG-3 (Optional) style MAJOR1 attribute MINOR1 DLG-3 (Optional) style MINOR1 attribute MAJOR2 DLG-3 (Optional) style MAJOR2 attribute MINOR2 DLG-3 (Optional) style MINOR2 attribute CONTACT.AAT NAME P1 P2 BW CCA HP MAJOR1 MINOR1 MAJOR2 MINOR2 CONTACT 1 - 0 1 101 500 201 - - WATER, SHORELINE 2 - 0 1 101 40 200 - - STATE OUTLINE 3 - 127 0 139 91 8 - - FAULT - 1 0 4 102 - - 501 203 FAULT, THRUST - 2 0 4 102 - - 501 204 FAULT, DOTTED - 3 106 0 110 - - 501 205 FAULT, DASHED - 4 114 0 114 - - 501 206 BAR - 5 0 0 101 - - 501 218 DIATREME - 8 0 0 101 - - 501 215 VOL. CONE - 9 0 212 201 - - 501 216 PC SHEAR ZONE - 22 0 0 101 - - 501 213 SINGLE LINE OUTCROP - 24 0 0 0 - - 501 226 NON-PRINTING CONTACT - 25 0 0 0 500 202 - - Some vectors can have both a P1 and P2 code. Such as a fault that is also a contact. DECO.AAT NAME P1 BW CCA HP MAJOR1 MINOR1 BALL 6 0 1 101 501 219 TEETH 7 0 1 101 501 220 DIATREME 8 0 2 101 501 215 VOL. NECK 10 0 212 201 501 217 MONOCLINE 11 0 212 201 501 207 MONOCLINE, DOTTED 12 0 353 209 501 208 SYNCLINE 13 0 212 201 501 209 SYNCLINE, DOTTED 14 0 353 209 501 210 ANTICLINE 15 0 212 201 501 211 ANTICLINE, DOTTED 16 0 353 209 501 212 MONOCLINE ARROW 17 0 212 201 501 221 SYNCLINE ARROW 18 0 212 201 501 222 ANTICLINE ARROW 19 0 212 201 501 223 FOLD ARROWHEAD 20 0 212 201 501 224 OVERTURNED SYMBOL 21 0 212 201 501 225 PC SHEAR ZONE 22 0 1 101 501 213 JURASSIC LIMIT 23 118 0 113 501 214 LINE.AAT NAME P1 BW CCA HP MAJOR1 MINOR1 Tbbi, 49 0 384 501 510 49 Tbr, 50 0 386 502 510 50 Tui, 58 0 512 503 510 58 Tmi, 59 0 505 508 510 59 TKi, 66 0 441 504 510 66 Kmj, 99 0 335 507 510 99 _am, 172 0 331 505 510 172 Yam, 181 0 449 506 510 181 Tmi,inferred 185 0 500 509 510 185 CONTACT.PAT NAME P1 CCA HP CCB PATT MAJOR1 MINOR1 Qa, 1 16 1 0 0 520 1 Qg, 2 24 2 0 0 520 2 Qgo, 3 31 3 0 0 520 3 Qe, 4 19 4 0 0 520 4 Qeo, 5 19 5 0 55 520 5 Qd, 6 25 6 0 0 520 6 Qdo, 7 25 7 0 55 520 7 Ql, 8 25 8 0 71 520 8 Qb, 9 61 9 0 0 520 9 QTsa, 10 19 10 0 71 520 10 QTa, 11 31 11 0 55 520 11 To, 12 50 12 0 0 520 12 Tgv, 13 50 13 0 71 520 13 Ta, 14 50 14 0 55 520 14 Twr, 15 64 15 0 0 520 15 Th, 16 75 16 0 71 520 16 Tcu, 17 47 17 0 0 520 17 Tpc, 18 303 18 0 0 520 18 Tdu, 19 303 19 0 0 520 19 Tbp, 20 50 20 0 0 520 20 Tt, 21 50 21 0 0 520 21 Tnp, 22 50 22 0 0 520 22 Tos, 23 64 23 0 0 520 23 Tu, 25 75 25 0 71 520 25 Tb, 26 75 26 0 71 520 26 Tg, 27 81 27 0 7 520 27 Tgp, 28 103 28 0 0 520 28 Tgl, 29 81 29 0 0 520 29 Tglm, 30 103 30 0 0 520 30 Tgt, 31 88 31 0 103 520 31 Tglu, 32 81 32 0 0 520 32 Tglw, 33 81 33 0 71 520 33 Tw, 34 47 34 0 0 520 34 Twc, 35 45 35 0 0 520 35 Twn, 36 46 36 0 0 520 36 Two, 37 47 37 0 71 520 37 Tf, 38 303 38 0 0 520 38 Tc, 39 303 39 0 0 520 39 Tm, 40 303 40 0 0 520 40 Td, 41 50 41 0 0 520 41 Ts, 42 50 42 0 0 520 42 Tsp, 43 303 43 0 0 520 43 Tlp, 44 50 44 0 0 520 44 Tsj, 45 47 45 0 0 520 45 Te, 46 47 46 0 0 520 46 Tn, 47 303 47 0 0 520 47 Tbb, 48 118 48 0 7 520 48 Tbbi, 49 152 49 0 0 520 49 Tbr, 50 186 50 0 0 520 50 Tbrt, 51 96 51 0 0 520 51 Taf, 52 152 52 0 0 520 52 Tial, 53 64 53 0 0 520 53 Tiql, 54 64 54 0 127 520 54 Tpl, 55 348 55 0 0 520 55 Twm, 56 155 56 0 0 520 56 Tv, 57 79 57 0 0 520 57 Tui, 58 358 58 0 0 520 58 Tmi, 59 124 59 0 0 520 59 TKda, 60 35 60 0 0 520 60 Tdv, 61 35 61 0 71 520 61 TKdl, 62 35 62 0 0 520 62 TKr, 63 35 63 0 0 520 63 TKa, 64 35 64 0 0 520 64 TKec, 65 32 65 0 103 520 65 TKi, 66 387 66 0 0 520 66 Kl, 67 723 67 0 0 520 67 Kf, 68 718 68 0 0 520 68 Klf, 69 718 69 0 7 520 69 Kvt, 70 723 70 0 7 520 70 Kp, 71 716 71 0 0 520 71 Kpu, 72 712 72 0 0 520 72 Kpm, 73 767 73 0 0 520 73 Kpl, 74 720 74 0 0 520 74 Kn, 75 761 75 0 0 520 75 Kcg, 76 736 76 0 0 520 76 Kc, 77 761 77 0 0 520 77 Kpg, 78 709 78 0 71 520 78 Kdp, 79 785 79 0 0 520 79 Kd, 80 785 80 0 0 520 80 Kmw, 81 723 81 0 0 520 81 Kls, 82 712 82 0 0 520 82 Kmv, 83 717 83 0 0 520 83 Kmvu, 84 737 84 0 0 520 84 Kmvl, 85 751 85 0 95 520 85 Kw, 86 767 86 0 0 520 86 Ki, 87 751 87 0 95 520 87 Kh, 88 737 88 0 0 520 88 Ksc, 89 767 89 0 55 520 89 Kmgs, 90 751 90 0 95 520 90 Km, 91 736 91 0 0 520 91 Kmfm, 92 709 92 0 103 520 92 Kfd, 93 785 93 0 95 520 93 Kdb, 94 785 94 0 0 520 94 Kkf, 95 723 95 0 0 520 95 Kpcl, 96 767 96 0 0 520 96 Kch, 97 720 97 0 0 520 97 Kmp, 98 761 98 0 0 520 98 Kmj, 99 736 99 0 71 520 99 KJdm, 100 755 100 0 103 520 100 KJdj, 101 755 101 0 103 520 101 KJdw, 102 755 102 0 103 520 102 KJdr, 103 755 103 0 103 520 103 KJde, 104 755 104 0 103 520 104 KJds, 105 755 105 0 103 520 105 Jm, 106 746 106 0 0 520 106 Jmj, 107 746 107 0 0 520 107 Jmc, 108 746 108 0 0 520 108 Jmw, 109 746 109 0 0 520 109 Jmr, 110 746 110 0 0 520 110 Jme, 111 746 111 0 0 520 111 Jms, 112 746 112 0 0 520 112 Jmse, 113 746 113 0 0 520 113 Jmce, 114 746 114 0 0 520 114 Jmre, 115 746 115 0 0 520 115 Jmwe, 116 746 116 0 0 520 116 J@g, 117 782 117 0 0 520 117 J@gc, 118 782 118 0 71 520 118 J@mg, 119 782 119 0 95 520 119 J@mc, 120 800 120 0 0 520 120 @kc, 121 790 121 0 0 520 121 @wc, 122 790 122 0 0 520 122 @m, 123 741 123 0 0 520 123 @ch, 124 741 124 0 0 520 124 @cc, 125 776 125 0 103 520 125 @c, 126 776 126 0 0 520 126 @d, 127 776 127 0 0 520 127 @dg, 128 776 128 0 0 520 128 @Pl, 129 788 129 0 103 520 129 @Ps, 130 788 130 0 0 520 130 @Pll, 131 788 131 0 0 520 131 @Pjs, 132 788 132 0 95 520 132 @Pcs, 133 788 133 0 95 520 133 @Pcp, 134 788 134 0 95 520 134 @Pr, 135 788 135 0 71 520 135 @Pdc, 136 788 136 0 71 520 136 @Pmc, 137 788 137 0 0 520 137 @&lf, 138 805 138 0 0 520 138 Pp, 139 682 139 0 0 520 139 Pu, 140 682 140 0 0 520 140 Pc, 141 681 141 0 0 520 141 Mz, 142 0 142 0 71 520 142 MzPz, 143 0 143 0 71 520 143 P&f, 144 408 144 0 95 520 144 P&cf, 145 408 145 0 0 520 145 P&if, 146 408 146 0 0 520 146 P&s, 147 408 147 0 0 520 147 P&m, 148 408 148 0 0 520 148 P&w, 149 440 149 0 95 520 149 P&wm, 150 440 150 0 95 520 150 &m, 151 0 151 14 0 520 151 &b, 152 0 152 0 103 520 152 &mb, 153 0 153 14 0 520 153 &e, 154 0 154 12 95 520 154 &ee, 155 0 155 12 0 520 155 &mbe, 156 0 156 12 0 520 156 &h, 157 0 157 16 0 520 157 &rh, 158 0 158 15 0 520 158 &mr, 159 0 159 15 0 520 159 M_, 160 378 160 0 0 520 160 MDO, 161 448 161 0 0 520 161 DO_, 162 448 162 0 0 520 162 O_, 163 352 163 0 0 520 163 Or, 164 352 164 0 0 520 164 MD, 165 448 165 0 0 520 165 MD_, 166 435 166 0 0 520 166 DO, 167 448 167 0 0 520 167 _s, 168 171 168 0 0 520 168 Mm, 169 448 169 0 0 520 169 _l, 170 171 170 0 0 520 170 M_ml, 171 378 171 0 0 520 171 _am, 172 814 172 0 0 520 172 Yu, 173 32 173 0 135 520 173 YXu, 174 32 174 0 119 520 174 Xb, 175 0 175 18 0 520 175 Xfh, 176 44 176 0 7 520 176 Xq, 177 0 177 18 71 520 177 Wr, 178 319 178 0 0 520 178 Yp, 179 107 179 0 7 520 179 Yg, 180 169 180 0 7 520 180 Yam, 181 689 181 0 0 520 181 Xg, 182 91 182 0 71 520 182 Xm, 183 385 183 0 0 520 183 YXg, 184 348 184 0 71 520 184 H2O, 200 680 200 0 0 40 100 DECO.PAT NAME P1 CCA HP CCB PATT MAJOR1 MINOR1 Pipe, 186 0 0 0 0 530 186 , (BLANK) 187 0 0 0 0 530 187 Ball, 190 1 201 0 0 530 190 Cog, (TEETH) 191 1 201 0 0 530 191 INDEX.PAT NAME P1 CCA HP CCB PATT MAJOR1 MINOR1 Index map color, 199 47 17 0 0 530 199 Index map color, 199 31 3 0 0 530 199 Index map color, 199 79 57 0 0 530 199 Index map color, 199 723 97 0 0 530 199 LINE.PAT NAME P1 MAJOR1 MINOR1 none 0 0 0 4. Procedures used to create or automate data This geologic map was prepared as a part of a study of digital methods and techniques as applied to complex geologic maps. The geologic map was digitized from the original scribe sheets used to prepare the published Geologic Map of Colorado (Tweto 1979). Consequently the digital version is at 1:500,000 scale using the Lambert Conformal Conic map projection parameters of the state base map. Stable base contact prints of the scribe sheets were scanned on a Tektronix 4991 digital scanner. The scanner automatically converts the scanned image to an ASCII vector format. These vectors were transferred to a VAX minicomputer, where they were then loaded into ARC/INFO. Each vector and polygon was given attributes derived from the original 1979 geologic map. This database was developed on a MicroVAX computer system using VAX V 5.4 nd ARC/INFO 5.0 software. 5. Revisions made to data (revision number, date, description) UPDATE: April 1995, The update was done solely for the purpose of adding the abilitly to plot to an HP650c plotter. Two new ARC/INFO plot AMLs along with a lineset and shadeset for the HP650C design jet printer have been included. These new files are COLORADO.650, INDEX.650, TWETOLIN.E00 and TWETOSHD.E00. These files were created on a UNIX platform with ARC/INFO 6.1.2. Updated versions of INDEX.E00, CONTACT.E00, LINE.E00, DECO.E00 and BORDER.E00 files that included the newly defined HP650c items are also included. LINESETS and SHADESET: CALCOMP The plot program COLORADO.AML uses two linesets, CARTO.LIN and CCA.LIN. As the COLORADO.AML runs, black lines are produced from the INFO item BW which calls the ARC/INFO CARTO.LIN line set, to generate color lines the INFO item CCA calls the electrostatic 1024 color line set file, included as lineset CCALIN.E00. To produce polygons three shadesets are used, color polygons are produced from the INFO items CCA and CCB which calls the electrostatic 1024 color shadeset files, included as shadeset CCASHD.E00 and CCBSHD.E00 To generate polygons patterns the INFO item PATT calls the shadeset file DOT, included as DOTSHD.E00. LINESETS and SHADESET: HP650c The plot program COLORADO.650 uses one lineset, TWETO.LIN. As the COLORADO.650 aml runs, color and black lines are produced from the INFO item HP which calls the supplied ARC/INFO line set, TWETOLIN.E00 To produce polygons one shadeset is used, color polygons are produced from the INFO items HP which calls the HP650c color shadeset file, included as shadeset TWETOSHD.E00. To generate polygons patterns the INFO item HP calls the shadeset TWETO.SHD. FONTS: The text fonts for the 3 special geologic symbols are included as font FNT003.FNT. The ASCII code for @ has been redefined to the symbol for Triassic, the ASCII code for & has been redefined to the symbol for Pennsylvanian and the ASCII code for _ has been redefined to the symbol for Cambrian. 6. Reviews applied to data (review type, date, person, description) The author wishes to thank Richard Taylor for storing and protecting the original Geologic Map of Colorado scribe sheets and negatives, Margaret Clemensen for assistance in preparing the explanation sheet and Scott Hogan and Kirsten Findell for review of the digital map; all are with the USGS. The author wishes to thank Randy Phillips of the Colorado State Geologic Survey for creating the TWETO.SHD shadeset. 7. Related spatial and tabular data sets and programs Digital geologic map information USGS Open File 92-0507 is in the followin ASCII or ARC/INFO export .E00 files: READ.1ST Text file that contains the first page of this document. READ.2ND Text file that contains this Open-File 92-0507 document. LOAD.AML ARC/INFO commands that can be used to automatically rebuild the database from ASCII. COLORADO.CAL ARCPLOT commands that create a Calcomp plot file of the Geologi from the data bases. COLORADO.650 ARCPLOT commands that create an HP650c plot file of the Geologi from the data bases. LAMBERT.PRJ A file of the projection parameters used. SETUP.AML The ARCEDIT AML with the edit tolerances used. CCALIN.E00 ARC/INFO lineset file A, The palette of line types for an electrostatic plotter. CCBLIN.E00 ARC/INFO lineset file B, The palette of line types for an electrostatic plotter. CCASHD.E00 ARC/INFO shadeset file A, The palette of colors for an electrostatic plotter. CCBSHD.E00 ARC/INFO shadeset file B, The palette of colors for an electrostatic plotter. DOTSHD.E00 ARC/INFO shadeset patterns, a palette of patterns. FNT003.E00 ARC/INFO geologic symbols font file. TWETOLIN.E00 ARC/INFO lineset file, The palette of line types for an HP650c plotter. TWETOSHD.E00 ARC/INFO shadeset file, The palette of line types for an HP650c plotter. INDEX.CAL ARCPLOT commands that create a plot file of the Geologic Map Explanation sheet for an electrostatic plotter. INDEX.650 ARCPLOT commands that create a plot file of the Geologic Map Explanation sheet for an HP650c plotter. INDEX.E00 The Geologic Map Explanation sheet (no projection). EXPL-01.TXT ARCPLOT text files for Colorado Explanation Sheet. thru EXPL-22.TXT BORDER.E00 The title and scale bars of the sheet (Lambert projection). CONTACT.E00 The Geologic Map of Colorado contacts and faults file. DECO.E00 The Geologic Map of Colorado decorations file. LINE.E00 The Geologic Map of Colorado single line outcrop file. 8. References cited Tweto, Ogden, 1976, Preliminary Geologic Map of Colorado: U.S. Geol. Survey Misc. Field Studies Map MF-788, 2 sheets. Tweto, Ogden, 1979, Geologic Map of Colorado: U.S.Geol. Survey, Special Geologic Map 9. Notes The author wishes to thank Richard Taylor for storing and protecting the original Geologic Map of Colorado scribe sheets and negatives, Margaret Clemensen for assistance in preparing the explanation sheet and Scott Hogan and Kirsten Findell for review of the digital map; all are with the USGS. The author wishes to thank Randy Phillips of the Colorado State Geologic Survey for creating the TWETO.SHD shadeset.