Online Links:
| Value | Definition |
|---|---|
| Ph | Hermit Formation |
| Pkf | Kaibab Formation Fossil Mountain member |
| Pkh | Kaibab Formation Harrisburg member |
| Ptb | Toroweap Formation Brady Canyon member |
| Pts | Toroweap Formation Seligman member |
| Ptw | Toroweap Formation Woods Ranch member |
| Qa1 | Young alluvial fan deposits |
| Qa2 | Young intermediate age alluvial fan deposits |
| Qa3 | Older intermediate age alluvial fan deposits |
| Qa4 | Older alluvial fan deposits |
| Qaf | Artificial deposits |
| Qc | Colluvial deposits |
| Qf | Floodplain deposits |
| Qg1 | Young terrace gravel deposits |
| Qg2 | Intermediate terrace gravel deposits |
| Qg3 | Older terrace gravel deposits |
| Ql | Landslide deposits |
| Qlb | Little Tanks basalt flow |
| Qlp | Little Tanks pyroclastic deposits |
| Qs | Stream-channel alluvium |
| Qt | Talus deposits |
| Qv | Valley-fill deposits |
| Tbb | Bundyville basalt flows |
| Tgb | Grassy Mountain basalt flows |
| Tgi | Grassy Mountain intrusive dikes |
| Tgp | Grassy Mountain pyroclastic deposits |
| Ti | Intrusive dikes |
| Tpb | Poverty Mountain basalt flows |
| Tpi | Poverty Mountain intrusive neck |
| Tpkb | Poverty Knoll basalt flow |
| Tpki | Poverty Knoll intrusive dike |
| Tpp | Poverty Mountain pyroclastic deposits |
| TRcp | Chinle Formation Petrified Forest member |
| TRml | Moenkopi Formation Lower red member |
| TRmm | Moenkopi Formation Middle red member |
| TRms | Moenkopi Formation Shnabkaib member |
| TRmt | Moenkopi Formation Timpoweap member |
| TRmu | Moenkopi Formation Upper red member |
| TRmv | Moenkopi Formation Virgin Limestone member |
| Value | Definition |
|---|---|
| 0 | No fill pattern in poly/region |
| 4 | Breccia fill pattern |
| 516 | Dense circle fill pattern |
| 518 | Circle fill pattern |
| Value | Definition |
|---|---|
| CONTACT_CERTAIN | Boundary between two mapped units that retains the original depositional or intrusive relationship. The contact has been observed or is closely constrained, so it is well located as described in Positional_Accuracy. |
| HIGH_ANGLE_FLT_APPROX | Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock boundaries on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within 2 mm at map scale or within about 63 meters on the ground. |
| HIGH_ANGLE_FLT_CERTAIN | Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well located as described in Positional_Accuracy. |
| HIGH_ANGLE_FLT_CONCEALED | Structural boundary between mapped units or structural discontinuity withina mapped unit that has experienced relative offset between the rok bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well- located as described in Positional_Accuracy, but the location isconstrained to be within 3 mm at mapscale or within about 95 meters on the ground |
| NORMAL_FLT_APPROX | Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock boundaries on either side of the fault. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within 2 mm at map scale or within about 63 meters on the ground. |
| NORMAL_FLT_CONCEALED | Structural boundary between mapped units or structural discontinuity withina mapped unit that has experienced relative offset between the rok bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well- located as described in Positional_Accuracy, but the location isconstrained to be within 3 mm at mapscale or within about 95 meters on the ground |
| LANDSLIDE_SCARP | Line demarcating the headwall of a landslide, also serving as a contact betweena landslide unit (Ql) and the adjacent lithologic unit. This feature has been well-located as described in Positional_Accuracy. |
| MAP_BOUNDARY | Edge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in positional_accuracy. |
| Value | Definition |
|---|---|
| FAULT_BALL_FILL | Arcmarker attached to an arc describing the nature of displacement along a fault. Side of arc with bar and ball is the side with downthrown displacement. |
| Value | Definition |
|---|---|
| ANTICLINE_CERTAIN_RED | The surface trace of the axis of an anticline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. |
| ANTICLINE_CONCEALED_RED | The surface trace of the axis of an anticline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. The axis is concealed by younger units unaffected by earlier folding. |
| BASALT_FLOW_DIRECTION | Line illustrating the direction of basalt flow from volcanic vent location |
| MONOCLINE_CERTAIN_RED | The surface trace of the axis of a monocline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. |
| MONOCLINE_CONCEALED_RED | The surface trace of the axis of a monocline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. The axis is concealed by younger units unaffected by earlier folding. |
| SYNCLINE_CERTAIN_RED | The surface trace of the axis of a syncline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. |
| SYNCLINE_CONCEALED_RED | The surface trace of the axis of a syncline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. The axis is concealed by younger units unaffected by earlier folding. |
| PLUNGING_SYNCLINE_RED | The surface trace of the axis of a plunging syncline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. |
| PLUNGING_ANTICLINE_RED | The surface trace of the axis of a plunging anticline. The axis cannot been observed, but the location is constrained to be within about 5 mm at map scale or within about 160 meters on the ground. |
| Value | Definition |
|---|---|
| ANTICLINE_RED | Point element placed on line indicating the anticlinal nature of the particular fold axis. Defined only in conjunction with an LTYPE of ANTICLINE_CERTAIN_RED or ANTICLINE_CONCEALED_RED |
| MONOCLINE_RED | Point element placed on line indicating the monoclinal nature of the particular fold axis. Defined only in conjunction with an LTYPE of MONOCLINE_CERTAIN_RED or MONOCLINE_CONCEALED_RED |
| SYNCLINE_RED | Point element placed on line indicating the synclinal nature of the particular fold axis. Defined only in conjunction wiht an LTYPE of SYNCLINE_CERTAIN_RED or SYNCLINE_CONCEALED_RED |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 90 |
| Units: | degrees |
| Resolution: | 1 |
| Value | Definition |
|---|---|
| APPROX_BEDDING | Originally horizontal sedimentary layers were observed at this location. Through aerial photo interpretation, the approximate orientation of the layers was measured. |
| BEDDING | Originally horizontal sedimentary layers were observed and measured at this point. |
| DOME_RED | Originally horizonal sedimentary layers all dipping away from center were observed at this location |
| COLLAPSE_STRUCTURE | Location where a circular collapse structure characterized by strata dipping inward toward central point was observed. May reflect collapse of a deep-seated breccia pipe. |
| SINKHOLE | Observed location of an enclosed depression or cave |
| VERTICAL_JOINT | The orientation of vertical rock fractures without displacement was measured at this point. |
| VOLCANIC_VENT | Observed location of a volcanic vent or cinder cone center. |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 90 |
| Units: | degrees |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 359 |
| Units: | degrees |
| Resolution: | 1 |
We would like to thank Debra Block at the Flagstaff USGS for all her GIS and ARC support and all those questions. Darlene Casebier at Flagstaff for her assistance with layout and cartography, and plotting. We'll probably also thank whoever does our digital database review, whoever that person might be. Thanks also go out to Jan Zigler and Russ Graymer in Menlo Park for all their help answering questions, and making sure everything we were supposed to do got done - eventually.
The geologic map of the upper Parashant Canyon area covers part of the Colorado Plateau and several large tributary canyons that make up the western part of Arizona's Grand Canyon. The map is part of a cooperative U.S. Geological Survey and National Park Service project to provide geologic information for areas within the newly established Grand Canyon/Parashant Canyon National Monument. Most of the Grand Canyon and parts of the adjacent plateaus have been geologically mapped; this map fills in one of the remaining areas where uniform quality geologic mapping was needed. The geologic information presented may be useful in future related studies as to land use management, range management, and flood control programs for federal and state agencies, and private concerns.
Are there legal restrictions on access or use of the data?Access_Constraints: None
Use_Constraints:Uses of this digital geologic map should not violate the spatial resolution of the map area (1:31,680) even though the digital data form removes the constraint of scale on a paper map. The accuracy inherent in map scale are also present in digital format. At a scale larger than 1:31,680, higher resolution data is not available and will not yield greater real detail.
Any use of trade, product of firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this publication has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
| Data format: | Plotfile package consists of two PostScript files, one for the map sheet and one for the pamphlet. in format PostScript PostScript files generated by Adobe Illustrator 8.0 Size: 5.6123 |
|---|---|
| Network links: |
http://pubs.usgs.gov/mf/2000/2343/mf2343ps.zip |
| Data format: | Plotfile package consists of two PDF files, one for the map sheet and one for the pamphlet. in format PDF PDF files generated by Adobe Illustrator 8.0 Size: 4.5869 |
|---|---|
| Network links: |
http://pubs.usgs.gov/mf/2000/2343/mf2343pdf.zip |
| Data format: | Digital Database package consisting of 11 ARC/INFO export files, along with supporting text and pamphlets, revision list, metadata (this file), and import AML. in format ARCE (version 7.2.1) Size: 9.0820 |
|---|---|
| Network links: |
http://pubs.usgs.gov/mf/2000/2343/mf2343db.zip |