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| Value | Definition |
|---|---|
| Cm | Muav Limestone |
| Dtb | Temple Butte Formation |
| Mr | Redwall Limestone |
| MPs | Supai Group undivided |
| Pe | Esplanade Sandstone |
| Ph | Hermit Formation |
| Pc | Coconino Sandstone |
| 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 |
| Qaf | Artificial deposits |
| Qb | Quaternary basalt flows |
| Qb1 | Quaternary basalt flows |
| Qb6375 | Basalt flows of hill 6375 |
| Qb6467 | Basalt flows of hill 6467 |
| Qb6588 | Basalt flows of hill 6588 |
| Qb6646 | Basalt flows of hill 6646 |
| Qc | Colluvial deposits |
| Qltb | Larimore Tank basalt |
| Qcbb | Craigs Knoll and Berry Knoll basalt flows |
| Qcbi | Craigs Knoll and Berry Knoll intrusives |
| Qcbp | Craigs Knoll and Berry Knoll pyroclastics |
| Qf | Floodplain deposits |
| Qg1 | Young terrace gravel deposits |
| Qg2 | Intermediate terrace gravel deposits |
| Qi | Basalt Dikes |
| Qkrb | Kenworthy Ranch basalt flows |
| Qkrp | Kenworthy Ranch pyroclastic deposits |
| Ql | Landslide deposits |
| Qlsb | Little Springs basalt flow |
| Qlsp | Little Springs pyroclastic deposits |
| Qmrb | Marshall Ranch basalt flow |
| Qmrp | Marshall Ranch pyroclastic deposits |
| Qp | Quaternary pyroclastic deposits |
| Qp1 | Quaternary pyroclastic deposits |
| Qp6375 | Pyroclastics of Hill 6375 |
| Qp6467 | Pyroclastics of Hill 6467 |
| Qp6588 | Pyroclastics of Hill 6588 |
| Qp6646 | Pyroclastics of Hill 6646 |
| Qpvb | Potato Vally basalt flows |
| Qpvp | Potato Vally pyroclastic deposits |
| Qs | Stream-channel alluvium |
| Qgrb | Graham Ranch basalt |
| Qgrp | Graham Ranch pyroclastics |
| Qt | Talus deposits |
| QTi | Intrusive dikes |
| Qv | Valley-fill deposits |
| Tb | Basalt flows north of Mt. Emma |
| Tbb | Bundyville basalt flows |
| Tbi | Bundyville intrusives |
| Ti | Intrusive dikes |
| Tmlb | Mount Logan basalt flows |
| Tmb | Mount Trumbull basalt flows |
| Tmi | Mount Trumbull intrusives |
| Tp | Pyroclastics north of Mt. Emma |
| 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 |
| Value | Definition |
|---|---|
| CONTACT | 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. |
| NORMAL HIGH ANGLE INFERRED FAULT | 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 HIGH ANGLE FAULT | 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. |
| NORMAL HIGH ANGLE CONCEALED FAULT | 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. |
| BASALT FLOW DIRECTION | Interpreted direction of flow as seen in a basalt flow unit. Arrowhead points in direction of flow |
| BASALT FLOW DIRECTION TAIN | Interpreted direction of flow as seen in a basalt flow unit. No arrowhead is present |
| Value | Definition |
|---|---|
| bar and ball | 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. |
| none | Indicates that no arcmarker is to be placed on specified arc |
| Value | Definition |
|---|---|
| SYNCLINE | 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. |
| MONOCLINE | 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. |
| CONCEALED MONOCLINE | 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. |
| Value | Definition |
|---|---|
| monocline | Arcmarker attached to an arc describing the monoclinal nature of fold axis |
| syncline | Arcmarker attached to an arc describing the synclinal nature of fold axis |
| none | Indicates that no arcmarker is to be placed on specified arc |
| Value | Definition |
|---|---|
| bedding | Originally horizontal sedimentary layers were observed and measured at this point. |
| probable breccia pipe (C) | 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. |
| pyroclastic cone | 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 answers to all those questions. Thanks also to Scott Graham for the digital review of the dataset, Haydee Hampton for initial preparation of the digital files, Theresa Iki for her map editing, and Rich Koch and Carolyn Donlin for final publications work.
The geologic map of the Uinkaret volcanic field 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: | Geologic units and structural features in format ARCE (version 7.2.1) Size: 14.1 |
|---|---|
| Network links: |
http://pubs.usgs.gov/mf/2001/2368/uinkdb.zip |