Fault database for the George and NE Edward Rifts, Uganda

<p>This database is associated with a master&#39;s research project at the University of Bristol. The initial geospatial database&nbsp;documents the geometry of 152&nbsp;faults identified through digital mapping, along with associated attributes. This represents the first detailed fault mapping conducted in the area. The version of record is in .geojson format, however data is&nbsp;also available in .kmz&nbsp;and .shp formats. Attributes are adapted from&nbsp;Williams <em>et al. </em>(2022) and the Global Earthquake Model Global Active Faults Database (GEM-GAFD; Styron &amp;&nbsp;Pagani, 2020).</p> <table> <caption>List and brief description of the attributes in the fault database (&#39;EGR_faults&#39;)</caption> <thead> <tr> <th scope="col">Attribute</th> <th scope="col">Data Type</th> <th scope="col">Description</th> <th scope="col">Notes</th> </tr> </thead> <tbody> <tr> <td>FAULT_ID</td> <td>integer</td> <td>Unique numerical reference ID</td> <td>&nbsp;</td> </tr> <tr> <td>CONFIDENCE</td> <td>integer</td> <td>Certainty of whether the fault exists there</td> <td>1 = moderate, 2 = high</td> </tr> <tr> <td>FAULT_NAME</td> <td>string</td> <td>Name of fault</td> <td>Not all faults are named. Assigned based on previous mapping or local geographic features.</td> </tr> <tr> <td>DIP_DIR</td> <td>string</td> <td>Compass quadrant of fault dip direction</td> <td>&nbsp;</td> </tr> <tr> <td>NOTES</td> <td>string</td> <td>Remaining miscellaneous information about the fault</td> <td>e.g. cross-cutting, segmentation, channel incision.</td> </tr> <tr> <td>LENGTH_TT</td> <td>integer</td> <td>Tip-to-tip fault length</td> <td>&nbsp;</td> </tr> <tr> <td>MAX_GRAD</td> <td>real number</td> <td>Estimated maximum gradient of scarp</td> <td>Calculated by taking fault-normal topographic profile at steepest gradient indicated by slope map.</td> </tr> <tr> <td>LENGTH</td> <td>real number</td> <td>Along-trace fault length</td> <td>&nbsp;</td> </tr> </tbody> </table> <p>Fault-normal topographic profiles were then used to measure scarp heights for 130 of the 152 mapped faults. The resulting displacement-length data for each fault is documented&nbsp;in &#39;slip_profile_data.zip&#39;. A summary of the analysis of fault slip (displacement-length) profiles is outlined in&nbsp;&#39;EGR_slip_profiles_summary.xlsx&#39;.</p> <table> <caption>List and brief description of the attributes in the slip profile summary (&#39;EGR_slip_profiles_summary&#39;)</caption> <thead> <tr> <th scope="col">Attribute</th> <th scope="col">Description</th> <th scope="col">Notes</th> </tr> </thead> <tbody> <tr> <td>Fault ID</td> <td>Unique numerical reference ID</td> <td>&nbsp;</td> </tr> <tr> <td>Length</td> <td>Along-trace fault length</td> <td>To nearest 100m</td> </tr> <tr> <td>D_max</td> <td>Maximum measured displacement along fault scarp</td> <td>&nbsp;</td> </tr> <tr> <td>D_max/L</td> <td>Maximum displacement divided by fault length</td> <td>&nbsp;</td> </tr> <tr> <td>Profile type</td> <td>First order shape of slip profile</td> <td>Following classifications outlined by Manighetti <em>et al.&nbsp;</em>(2001): <table> <tbody> <tr> <td>L = linear</td> </tr> <tr> <td>HR = half-restricted</td> </tr> <tr> <td>TR = tip-restricted</td> </tr> <tr> <td>DTR1 = both tips restricted, symmetrical</td> </tr> <tr> <td>DTR2 = both tips restricted, asymmetric</td> </tr> <tr> <td>DTR3 = half-restricted and tip-restricted</td> </tr> <tr> <td>QE = quasi-elliptical</td> </tr> <tr> <td>ET = elliptical with tapers</td> </tr> <tr> <td>U = unclear/intermediate pattern</td> </tr> </tbody> </table> </td> </tr> <tr> <td>Dominant propagation direction</td> <td>Direction that fault is preferentially propagating in</td> <td>For&nbsp;unilaterally-propagating faults (tip- or half-restricted) as well as DTR and elliptical-with-taper faults that show a strong sense of preferred propagation</td> </tr> <tr> <td>Clarity rating</td> <td>How well profile is fit by first-order shape</td> <td> <table> <tbody> <tr> <td>1 - profile clearly fit by first order shape</td> </tr> <tr> <td>2 - first order shape with moderate smaller-scale peturbations</td> </tr> <tr> <td>3 - first order shape determined with some difficultly, may be obscured by segmentation, channel incision etc.&nbsp;</td> </tr> <tr> <td>4 - profile not fit by any first order shape, or intermediate, or impossible to differentiate</td> </tr> </tbody> </table> </td> </tr> <tr> <td>Segments</td> <td>Estimated number of segments that fault is formed from</td> <td>Interpreted from displacement minima and mapping observations.</td> </tr> <tr> <td>Notes</td> <td>Remaining miscellaneous information about the fault</td> <td>e.g. channel incision, anomalous topographic features</td> </tr> </tbody> </table>