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| Value | Definition |
|---|---|
| Jn | Navajo Sandstone |
| Jk | Kayenta Formation |
| Jmos | Moenave Formation Springdale Sandstone member |
| Jmod | Moenave Formation Dinosaur Canyon member |
| 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 |
| Qd | Sand-sheet and dune deposits |
| Qg1 | Young terrace gravel deposits |
| Qg2 | Intermediate terrace gravel deposits |
| Ql | Landslide deposits |
| Qs | Stream-channel alluvium |
| Qt | Talus deposits |
| Qv | Valley-fill deposits |
| Trco | Chinle Formation Owl Rock member |
| Trcp | Chinle Formation Petrified Forest member |
| Trcs | Chinle Formation Shinarump member |
| Trm | Moenkopi Formation |
| Value | Definition |
|---|---|
| 4 | breccia pattern fill used in conjunction with unit 'Ql' |
| 516 | red dot fill pattern used in conjunction with unit 'Qg2' |
| 518 | dense red dot fill pattern used in conjunction with unit 'Qa4' |
| 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 within a mapped unit that has experienced relative offset between the rock 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 is constrained to be within 3 mm at mapscale or within about 95 meters on the ground |
| 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 |
|---|---|
| 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 | no arcmarker attached to arc |
| Value | Definition |
|---|---|
| ANTICLINE | 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. |
| CONCEALED ANTICLINE | 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. |
| 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. |
| 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. |
| PLUNGING ANTICLINE | 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 | Point element placed on line indicating the anticlinal nature of the particular fold axis. Defined only in conjunction with an LINETYPE of ANTICLINE or CONCEALED ANTICLINE |
| monocline | Point element placed on line indicating the monoclinal nature of the particular fold axis. Defined only in conjunction with an LINETYPE of MONOCLINE or CONCEALED MONOCLINE |
| syncline | Point element placed on line indicating the synclinal nature of the particular fold axis. Defined only in conjunction with an LINETYPE of SYNCLINE. |
| 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. |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 90 |
| Units: | degrees |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 359 |
| Units: | degrees |
| Resolution: | 1 |
Thank you to Debra Block for her digital review.
The digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the House Rock Spring area. Together with the accompanying text, it provides current information on the geologic structure and stratigraphy of the area covered. The database delineates map units that are identified by general age, lithology, and geomorphology following the spatial resolution (scale) of the database to 1:24,000. The content and character of the database, as well as three methods of obtaining the database, are described below.
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 (1:24,000) 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 1:24,000, 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: 4 |
|---|---|
| Network links: |
http://pubs.usgs.gov/mf/2001/2367/hrsdb.zip |