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Richard, Jon E. Spencer, Charles A. Ferguson, and Ann Youberg, D. W. Layton, and Thomas L. FinnellN101Miles100001000200030004000500060007000Feet101Kilometers110º 37'30"110º 45'32º 00'32º 00'Planar tectonite foliationÑInclined gneissic foliationÓMylonitic foliationþÑPlanar tectonite foliation, with stretching lineationInclined transposed beddingÐInclinedOverturned VerticalDistinct planar bedding measured with standard accuracy indicated by solid, straight strike lineFacing inferred or unknownosvFacing indicatorobservedrtIndistinct or crudely measured bedding indicated by broken strike linepContorted or variable bedding indicated qeHorizontal beddingApparent dip of beddingzInclined bedding measured in crossbedded rocks indicated by solid, straight strike line with hatchuresBeddingGEOLOGIC MAP SYMBOLSInclined close disjunct cleavageÈInclined cleavage parallel to beddingZCleavageSlaty cleavageXþXSlaty cleavage, with lineationj@:56Normal fault, showing attitude of fault surface (dashed where approximate; queried where bar symbol on downdropped side)Contact, showing attitude of contact surface (dashed where approximately located, where concealed)@j75Gradational contactLow-angle fault (dashed where approximate;%%%%Scratch contact (indicates contact necessary for polygon closure; not mapped based on geologic observation)Vein, showing attitude (dashed where approximate)�����������j80 where approximate)Mafic dike=========Felsic dikeLine SymbolsGEOLOGIC MAP UNITSQuaternary DepositsPiedmont AlluviumQuaternary alluvium, undividedQsHolocene alluvium, undivided ()Late Holocene alluvium ()Holocene alluvium (~2 to 10 ka)Holocene to late Pleistocene alluvium (0 to 130 ka)Late Pleistocene alluvium (~10 to 130 ka)Middle to late Pleistocene alluvium (~10 to 500 ka)Middle Pleistocene alluvium (~130 to 500 ka)Middle Pleistocene alluvium over dissected pediment(~130 to 500 ka)Middle to early Pleistocene alluvium (~500 ka to 2 Ma)Axial Stream DepositsQuaternary river terraces, undividedLate Holocene channel deposits ()Late Holocene river alluvium ()Qy2rRecently abandoned late Holocene floodplain and terracedeposits ()QyraHolocene river terrace deposits (~2 to 10 ka)Late Pleistocene river terrace deposits (~10 to 130 ka)Middle Pleistocene river terrace deposits (~130 to 500 ka)Early Pleistocene river terrace deposits (~1 to 2 Ma)Hillslope DepositsHolocene and Pleistocene hillslope colluviumQuaternary or Tertiary DepositsEarly Pleistocene to late Miocene alluvium (~1 to 10 Ma)QTsMapped exposures of QTs deposits beneath colluviumEarly Pleistocene to late Miocene gravel or conglomerate(~1 to 10 Ma)QTgPantano Formation and hillslope deposits mantling PantanoFormation, undividedTertiary RocksMiocene(?) Hydrothermal RocksQuartz veins and massive hydrothermal quartzHydrothermal carbonateSilicified rock with unknown protolithTsxSilicified conglomerate, probably derived from DavidsonCanyon facies of Pantano FormationSilicified Paleozoic carbonate rock, recognized by preservedtextures in chert nodulesSilicified quartzite(?), recognized by preserved grain outlinesSilicified granodiorite, derived from unit XgdHematite altered granodiorite, derived from unit XgdPantano FormationLower Davidson Canyon Facies; includes rocks lithologicallyidentical to units Tdf and Tdc, but interpreted to underlieporphyritic andesite unit (Ta)undivided conglomerate, sandstone, and mudstonemudstone and limestoneAgua Verde faciesBuff colored conglomerate with clasts of leucogranitefrom the Rincon MountainsTavcSedimentary brecciasGranite rock avalanche depositsTxgQuartzite rock avalanche depositsTxqDavidson Canyon faciesSilicified conglomerateMudstone with minor sandstone and locally abundantgypsumTdfSandstone, mudstone and conglomerateTdsConglomerate, upper and lower undividedTdcUpper Davidson Canyon Facies; includes rocks lithologicallyidentical to units Tdf and Tdc, but interpreted to overlieporphyritic andesite unit (Ta)undivided conglomerate, sandstone, mudstonemudstoneconglomerate Volcanic rocksCrystal poor andesitic lava flowsTuff and tuffaceous rocksAndesitic sandstone and conglomerateTasAndesitic conglomerateTacPorphyritic andesiteRyolite ash-flow tuffPantano Formation (cont.)Mesozoic RocksLaramide(?) igneous rocksIntermediate to mafic hypabyssal intrusive rocksBisbee GroupWillow Canyon-Apache Canyon facies (Early Cretaceous) -- Drablithofeldspathic sandstone, mudstone, and conglomerate KwGlance Conglomerate (Early Cretaceous or Jurassic) -- Massivecobble to boulder conglomerate KJgEarly Mesozoic rocksUndivided mudstone, sandstone and sparse conglomerateMustone, quartzose sandstoneSandstone, sparse conglomerate and mudstoneJTgsPaleozoic Sedimentary RocksCarbonate rocks (Paleozoic)PlConcha Limestone (Permian) -- Massive cherty limestoneScherrer Formation (Permian) -- Fine-grained quartz arenitePsMiddle Member -- Medium-bedded dolomite and sandy dolomiteEpitaph Formation (Permian)Middle member -- Fine-grained sandstone, mudstone, marl, anddolomiteLower Member -- Medium-bedded dark gray dolostoneEarp Formation (Permian or Pennsylvanian) -- Limestone interbeddedwith sandstone grading up into mostly fine-grained quartz arenite withmarker bed in lower part.Chert-pebble conglomerate markerOther marker beds, traced locallyUndivided Horquilla and Escabrosa formations (massive limestone)PMlHorquilla Formation (Pennsylvanian) -- Thick bedded to massivefossiliferous limestone, marly limestone, marlMarker beds, traced locallyKarst breccia (Mississippian?) -- Maroon mudstone, chert-pebbleconglomerate, and sandstoneMekEscabrosa Limestone (Mississippian) -- Massive cherty limestoneMeMartin Formation (Devonian) -- Medium-bedded dolostone, sandstone,and sandy dolostoneAbrigo FormationCaBolsa Quartzite (Cambrian) -- Fine- to coarse-grained feldspathicquartz arenite.Proterozoic RocksApache Group and diabasePioneer Formation -- Maroon to gray sandstone, argillite andmudstone, with basal conglomerateSierra Ancha DiabasePyroxeniteYdpIgneous and metamorphic rocksGranite (Middle or Early Proterozoic) -- Medium- to coarse-grainedbiotite granite; boundary with granodiorite (Xgd) not mappedGranodiorite (Early Proterozoic) -- Medium-grained, equigranularbiotite and hornblende-biotite granodioritePinal Schist(?) (Early Proterozoic) -- Pelitic granofels and gneissMiscellaneous UnitsDisturbedMAP EXPLANATIONYYY#Y#YVailSahuaritaA!A1l1o%L1xSAGUARONATL.MON.CORONADONATL.FORESTFORESTNATL.CORONADONATL.FORESTnRincon PeakVailMAP AREAShowing the location of the map area in relation to Pima and Cochise Counties, Arizona, and the greater Tucson areaArizona Geological SurveyDigital Geologic Map 12, Plate 1 of 1Research supported by the Arizona Geological Survey and the U.S. Geological Survey,National Cooperative Geologic Mapping Program, under USGS award #00HQAG0149.The view and conclusions contained in this document are those of the authors andshould not be interpreted as necessarily representing the official policies,either expressed or implied, of the U.S. Government.Correlation of Map Units and index map showing areas of mapping responsibilityArizona Geological SurveyDigital Geologic Map 12, Plate 1 of 1Arizona Geological SurveyRichard et al., 2001, VailDigital Geologic Map 12, Plate 1 of 1