Qac 15 Qaeo Qc Qac 15 Jk N TRcp R Qal2 Qf Tcs Qaeo Jmw TRmu Jmd TRcp TRms Jms Qal Qal4 4 Qaeo TRcp Qal Qms 1 TRmu 7 30 TRmu Qaf5 TRcp 27 Qc Qaf5 TRmu TRmu Qf Qmt TRmu Qaf5 TRcp TRmu Qmt Jk TRmu 12 Qac Qf Qmt TRms 27 Jmd 25 Qmt Qac TRms 7 Qaf5 TRcs Qal4 Qal1 TRmu Qms 15 Qal2 Qf Qac TRcs Qal TRmu 3 15 Qal2 Qmt Jmw S TRmu TRcs TRms TRcp Qal1 Qaf5 8 Qal2 15 A TRms TRcp 15 TRcs Qaf 10 5 Qmt TRmu 15 TRcs Qal1 Jmd 16 Jmw Quail Qaf5 TRms PARK Qf TRmu BOUNDARY Qms Qmt Qal3 TRms Creek 18 Qal1 Qaf TRcp 5 Qal3 37 Qmt Qal2 Reservoir Jms Qae 28 RiverQc Qal Qf 1 Qmt Qb Qae 8 TRms Qf TRcp TRcs Qmt TRmu 15 Qal Jmd Qf 6 3 Jms Qal3 40 Jms Qmt Qf Jmw Qmt TRcs Qal Qmt 2 Qf TRmu Qal Qag Qmt anticline 1 Qae 22 24 Qag Qmt Qmt TRms Qal 14 3 Qal Qb Qmt 2 Qal2 Jms Qmt Qae Jms 9 Qal 1 Jk TRcs Qag 18 Virgin Qf Qal1 Qb Qal Figure 10. TRms 1 Virgin 34 Qac Qb TRmu Qf Geologic map of the Qmt Qag Quail Creek State Park area Qb in Washington County, Utah. The Qag Qf accompanying annotated photograph Qmt shows the view looking northeast toward Qmt Qb Quail Creek Reservoir. Note how the rocks here are Qmt folded into a broad upwarp that geologists call the TRcs Virgin anticline. The map and cross section explanation Location of identifies the geologic units and symbols used. photograph on next page 0 1 mile TRcs TRcs TRcs TRmu TRmu TRmu Qms TRcs TRms “Purgatory TRms Sandstone” TRcs TRmu TRms TRcs TRmu “Purgatory Sandstone” Northwest Southeast Quail Virgin River Elevation I-15 I-15 Creek Elevation (feet) TRcs (feet) TRcp Reservoir TRcs Qb Jk 3,000 TRcp 3,000 TRms Jm TRmm TRmu TRmv 2,000 TRmu TRml 2,000 Pk 1,000 Pt 1,000 Pq Sea level Sea level Cross section not to scale. Thin surficial deposits not shown. MAP AND CROSS SECTION TRIASSIC EXPLANATION Chinle Formation: TRcp Petrified Forest Member TRcs Shinarump Conglomerate Member Geologic Unit Descriptions Moenkopi Formation: QUATERNARY TRmu Upper red member TRms Shnabkaib member Qf Artificial fill Subsurface units- on cross section only: Qal1-4 River deposits TRmm Middle red member, Moenkopi Qaf5 Old alluvial-fan deposits TRmv Virgin Limestone Member Qmt Talus deposits TRml Lower red member Qms Landslide deposits Pk Kaibab Limestone (Permian) Qac Mixed river and slopewash deposits Pt Toroweap Formation (Permian) Qae Mixed river and wind-blown deposits Pq Queantoweap Sandstone (Permian) Qaeo Old mixed river and wind-blown deposits Geologic Symbols Qb Basalt lava flows Contact Qag Older river-channel deposits High-angle normal fault: ball and JURASSIC bar on downthrown side; dashed where approximate, dotted where Jk Kayenta Formation concealed Moenave Formation: Low-angle reverse fault: teeth on Jms Springdale Sandstone Member upper plate; dotted where Jmw Whitmore Point Member concealed Jmd Dinosaur Canyon Member Anticline 15 Strike and dip of beds.