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NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY 262000 263000 264000 NMBGMR Open-file Geologic Map 202 Last Modified August 2012 107°35'0"W 265000 266000 267000 Kmf Qal Qal Totb Qls Qafy Qyxtb Kmf Qls Qypob Qes Qal Kmf Qafo 3.04 Ma Qc Tgrt Qftb Qes Qftb Qc Totc Totb Qyob Qyob Qftb Qyptb Qes Qycopb Qes Qypob Qes Totd 3916000 Qycopb Qal Qyob Totd Tgrt Qal Qftb Qal Qls Qal Qes Tvst Qls Qyob Qftb Qt Qal 2.29 Ma Tvst Kmf Qftb 2.28 Ma Qyptb Qyptb Qls Qal Qyob Qafo Qls 3915000 3915000 Qal QTvs Qyxtb Tvst Qes Qes Qal Qaf Qc Qyxtb Qls QTvs Qyxtb Tvst Totb QTvs Tvst Qc Kmf Qls Qc Qls Qyatb Qyob Qyoc Qypob QTvs Qal 3914000 Qyod 45 Qal Qyptb Tgrt Qal Qc QTvs Tgrt Qls Tgrt Qls Qls Qyqtb QTvs Trtl Qyxtb Tgrt Trt Trtl Tgrt Qls Kmf HU12 Tls Tvst QTvs HU9 HU33 HU1 QTvs KD3-1-1 3911000 BK214 1-1 KD65 Fa u ita BK262 Qyxtb Qal Topta Qc 3 Qytb ZO14 Trt BK298 Qatb Tvst Ttdt BK306 Trt Trt Qc 23-1-5d BK310 BG10-1-1 Qyxtb Qt Qyfob Tyocb g Qyfpb Tsetdu QTvs g Tyocd Qytb 2.71 Ma Qyxtc Qc Tyocc 2.37 Ma Qal 30 3907000 Qyfpd Tbd Tsptdl 70 5 5 Tsptds Tsptds Qyatb Tsptdl Tsptds Qal Qal Tsptds Tsptds Tsetdl 70 5 Qyqtb Qyatb 30 Qyxtb QTvs QTvs Qc Qyatc Qal Qypob Qal Qyqtc 1.53 Ma Qal Toftd Qal Qyqtc QTvs 8 50 Tpbtd Tymtc 10 QTvs 80 80 Tpbti J Qyxtb 70 2.71 Ma Tcptd Qal Qc 80 90 50 Qc g Qc 30 Tpbta Qal Tpta 2.63 Ma Tomtc Tptba 263000 266000 107°35'0"W 267000 Alluvium—ȱȱǰȱȱȱȱȱȱ¢ȱĴǲȱ¢ȱȱȱǰȱȱ ǰȱ ȱ ¢ȱ ȱ ǲȱ ¢ȱ Ěȱ ȱ ȱ ¢¢ȱ ęȬǰȱ ȱ ȱ ȱ ȱ ȱ ȱȱȱǰȱ ȱ ȱȱȱȱ¢ȱȱȱǯȱȱȱ ¢ȱ ȱȱǲȱ¡ȱȱȱȱȱȱȱȱȱ¢ȱ¡ȱŗśȱǯ Colluvium—¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǲȱ ȱ ¢ȱ ȱ ¡ȱȱ ȱȱȱǲȱȱȱ¢ȱ¡ȱŗśȱǯ Eolian deposits— ȱȱȱ ȱȱȱȱȱęȱȱŖǯŘȱȱȱȱŗȱȱȱ ȱȱǯ Terrace deposits—ȱȱ¢ȱȱȱȱ£ȱȱ¢ȱȱȱȱ ¡¢ȱśȱȱŗśȱȱȱȱȱǲȱȱ¢ȱȱȱ£ȱ¢ǲȱȱȱ¢ȱ ȱ ȱȱǯ 268000 Tomtb 24 QTvs Younger very aphyric trachybasalt—ȱȱȱĚ ȱȱȱȱȱàȱ¡ǲȱȱ ȱȬ¢ȱȱǰȱęȬȱ ȱȱȱȱȱȱȱǻQyatcǼȱȱ¢ȱ¢ȱȱ ȱ ¢ȱ ȱ ȱ ĵȱ ¡¢ȱ ȱ ȱ ȱ ¢ȱ ȱ ǯȱ ¢ȱ ȱ ȱ ǰȱ ¢¡ǰȱ ȱ ǰȱ ȱ ¡ȱ ȱ ¢ȱ ¢ǰȱ ȱ ȱȱȱǯȱȱȱ ȱȱǻQyatdǼȱȱȱȱȱ ȱȱ ǯȱ ȱȱȱTbd, Qytb, Tymtb, QTvs and TbtaǯȱȱȱȱĚ ȱ ȱȱȱȱŸŴAr/ŷŽȱȱȱŗǯŘŜȱƹȱ Ŗǯŗşȱǯȱ ȱȱǂřŖȱȱǯ ȱĵȬȱ¢ȯ ȱȱȱĚ ȱ¡ǯȱȱȱ¡ȱȱȱȱ ȱ¢ǰȱęȬȱ ȱȱȱȱȱȱȱǻQyqtcǼȱȱȱȱ¢ȱȱ ¡¢ȱ ȱ ĵȱ ¡¢ǯȱ ȱ ȱ Ě ȱ ¢ȱ ȱ ȱ Qyatbȱ ȱ ȱ ȱ Tymtb in ȱ àȱ ¡ǯȱ ȱ ¡ȱ ȱ ȱ ȱ ¢ȱ ǯȱ ȱ ȱ ¡ȱ ȱ ȱ ¢ǰȱ Ȭȱ ȱȱȱȱȱȱȱǻQyqtcǼȱȱȱȱ¢ȱȱ ȱ ĵȱ ¡¢ȱ ȱ ȱ ǯȱ ¢ȱ ȱ ȱ ǰȱ ¢¡ǰȱ ǰȱ¢¡ȱȱȱ¡ȱȱǯȱ ȱ¢ȱȱȱȱȱȱǯȱ ȱ¢ȱȱȱQyptbȱ¢ȱȱȱȱȱQyxtbȱȱ ǯȱ ȱȱȱQTvsǯȱȱ ȱȱĚ ȱȱŸŴAr/ŷŽȱȱȱŗǯśřȱƹȱŖǯŖŝȱǯȱ¡ȱ¡ȱȱȱĚ ȱȱǂřśȱǯ ȱȬȱ¢ȯȱȱĚ ȱ¡ȱȱȱȱȱ¢ȱȱȱ ȱ ȱ ǲȱ ȱ ȱ ¢ȱ ȱ ȱ Ě ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǻQyhcǼȱ ȱ ȱ ȱȱ¢ȱȱǰȱȱ¢ȱȱȱȱȱȱ¡¢ȱȱĵȱ ȱ ǰȱ Ȭȱ ¢ȱ ǲȱ ȱ ǰȱ Ȭȱ ȱ ǻQyhdǼȱ ȱ ¡ȱ ȱ ¢ȱ ȱȱȱȱǲȱȱȱQyxtbǲȱȱȱǲȱ¡ȱ¡ȱȱȱŞŖȱǯ Younger aphyric trachybasalt—ȱ ȱ Ě ȱ ¡ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ Ȭȱǲȱȱȱȱ¢ȱĚ ȱȱȱȱȱȱȱǻQatcǼȱȱȱ ȱȱ ¢ȱȱǰȱ¢ȱǰȱȱȱĵȱ¡¢ǲȱȱȱȱȱȱ ȱȱǲȱȱȱQytb, Qyxtb and QTvsǲȱȱȱȱȱȱȱŸŴAr/ŷŽȱȱȱŗǯŝŜȱƹȱ ŖǯŖśȱǲȱ¡ȱȱȱȱŜŖȱǯ ȱęȬȱȱ¢ȯȱȱȱĚ ȱ¡ȱȱȱȱȱȱȱ ȱ¢ǲȱȱȱȱ¢ȱĚ ȱȱȱȱȱȱȱǻQyfocǼȱȱęȬȱȱ ȱ ȱ ¢ȱ ¢ȱ ȱ ǲȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ǲȱ ȱȱQytb and Tyocbǲȱȱȱȱǲȱ¡ȱ¡ȱȱȱǂśŖȱǯ ȱĴȱ¢ȯ ¢ȱȱȱȱĚ ȱȱȱȱȱȱȱǻQystcǼȱȱǰȱ Ĵȱ ȱȱȱ¢ȱȱȱǂŗȱȱǰȱȱȱ¢ȱ¢ȱȱǯȱȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ Ě ȱ ǯȱ ȱ Qyftb, Qyopb, Qypob, Tymtb and Tyocbǯȱȱȱȱǯȱ¡ȱȱȱȱȱŗŘŖȱǯ Qal Qal 80 QTvs Tvst Qyxtb 269000 270000 107°32'30"W 271000 35°15'0"N Ttd 272000 35°15'0"N West A A' East 10,000’ ASL Intersection Section L-L' with A-A' 4000 5000 6000 7000 FEET 81 1 SAN MATEO CERRO PELON LAGUNA CANONEROS NEW MEXICO 0.5 0 1 KILOMETER LOBO SPRINGS MOUNT TAYLOR SEBOYETA QUADRANGLE LOCATION New Mexico Bureau of Geology and Mineral Resources New Mexico Tech 801 Leroy Place Socorro, New Mexico 87801-4796 [575] 835-5490 Magnetic Declination March 2008 10º 0' East At Map Center New Mexico Bureau of Geology and Mineral Resources Open-File Geologic Map 202 Mapping of this quadrangle was funded by a matching-funds grant from the STATEMAP program of the National Cooperative Geologic Mapping Act, administered by the U. S. Geological Survey, and by the New Mexico Bureau of Geology and Mineral Resources, (L. Greer Price, Director and State Geologist, Dr. J. Michael Timmons, Geologic Mapping Program Manager). Geologic map of the Cerro Pelon quadrangle, Cibola and McKinley Counties, New Mexico. June 2010 This and other STATEMAP quadrangles are available for free download in both PDF and ArcGIS formats at: Land slide/mass wasting line BK58 50 2.30 Ma Uranium exploration well Strike and dip of bedding 50 Trace of axial plane of anticline, dashed where obscured. CONTOUR INTERVAL 20 FEET NATIONAL GEODETIC VERTICAL DATUM OF 1929 Fault. Bar and bar on downthrown side. Arrow indicates dip of fault. Solid where exposed, dashed ȱ¡¢ȱ ǰȱĴȱ ȱǯ ȱȱȱĚ ȱȱȱȱĚ ȱǰȱȱǯ Water well ȱǰȱǰȱȱǰȱȱĴȱǯ Spring Dated sample in millions of years. A A' Earth and Planetary Sciences Dept., University of New Mexico, Albuquerque, NM 87131 2 New Mexico Bureau of Geology and Mineral Resources, 801 Leroy Place, Socorro, NM 87801 3 Lawrence GeoServices Ltd. Co., 2321 Elizabeth St. NE, Albuquerque, NM 87112 4 Private Consultant, 5515 Quemazon, Los Alamos, NM 87544 The map has not been reviewed according to New Mexico Bureau of Geology and Mineral Resources standards. The contents of the report and map should not be considered final and complete until reviewed and published by the New Mexico Bureau of Geology and Mineral Resources. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the State of New Mexico, or the U.S. Government. 8,000 Qympb Qyfob Qyh Qytb Qystb Qycopb Qypob Qyopb Qyptb Qyfpb Qftb Qal Qyfpb Qal Qypoc Qyopb QTvs QTvs Totb? Kmf Kmm Kcs Kcda Kcdi Km Kd Jbb + Jwc TD= 4,185 ft. Kcg Kmm Kcs Kmm Kcs Kcs Kcdi Kg Kg 8,000 Kmf Kpl Kcda Kcg Totb? Kpl Kcg Kmm Qympc Qal Qympb Qypoc Qypob Qal Kpl Kd Jbb + Jwc Jrc Qytb QTvs QTvs QTvs Kpl Km 4,000 Qal Kmf Kcda Young ęȱ Mesa Chivato Qyptb 10,000’ ASL Qypob Kcdi Qatb Qyptc Qyqtc Qyqtb Kcg 6,000 Llanito Frio Tanks Area Bend in Section Qal QTvs Kmf Qyxtb COMMENTS TO MAP USERS Cross sections are constructed based upon the interpretations of the author made from geologic mapping, and available geophysical, and subsurface (drillhole) data. Cross-sections should be used as an aid to understanding the general geologic framework of the map area, and not be the sole source of information for use in locating or designing wells, buildings, roads, or other man-made structures. 1 Qyatb Qyqtb Km Qyptb Kg Kcdi Typob Qyopb 6,000 Kg Kd Jbb + Jwc Kd Qyqtb Tympb Jrc Jrc Jrc Km 4,000 Qyob Ttdt by Fraser Goff 1, Shari Kelley 2, John R. Lawrence 3 and Cathy J. Goff 4 http://geoinfo.nmt.edu Qt unconformity Geologic cross section A geologic map displays information on the distribution, nature, orientation, and age relationships of rock and deposits and the occurrence of structural features. Geologic and fault contacts are irregular surfaces that form boundaries between different types or ages of units. Data depicted on this geologic quadrangle map may be based on any of the following: reconnaissance field geologic mapping, compilation of published and unpublished work, and photogeologic interpretation. Locations of contacts are not surveyed, but are plotted by interpretation of the position of a given contact onto a topographic base map; therefore, the accuracy of contact locations depends on the scale of mapping and the interpretation of the geologist(s). Any enlargement of this map could cause misunderstanding in the detail of mapping and may result in erroneous interpretations. Site-specific conditions should be verified by detailed surface mapping or subsurface exploration. Topographic and cultural changes associated with recent development may not be shown. Qes Well BK 214 1-1 American Canyon Qls Pleistocene 3000 Qafy Qafo Tpta QTvs Ttdt Pliocene 2000 Dike, solid line where exposed QUATERNARY 1000 Geologic contact. Solid where exposed or known, ȱ ȱ¡¢ȱ ǰȱĴȱ ȱ concealed or inferred. Qc Colorado Canyon Qyxtb Qyxtb Qyxtb Qal Neogene 0 1 MILE Intersection Section M-M' with A-A' Lagunita Fault Holocene TERTIARY 1000 ěȱȱȱȱ¢ȯȱȱ¢ǰȱȱěȱȱȱȱ¢ȱȱ¢ȱȱ ȱȱȱȱȱǯȱěȱȱȱ¢ȱȱȱĚ ȱȱȱȱ ȱŚȱȱǯȱ ȱȱȱěȱȱ¢ȱ¡ȱȱȱȱ¢ǯȱȱȱ¢ȱěȱȱȱ ȱȱ¢ȱȱ ȱȱȱȱȱȱȱ¢ǰȱȱ¢ȱǯȱȱ ěȱȱȱȱȱȱȱȱ¢ȱȱȱŗŖȬŘŖƖȱǯȱȱȱȱȱȱ ¢ȱ ǯȱ ěȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǰȱ ȱ ȱ śȬŗŖƖȱ ȱ ǯȱ ¢ȱȱ ȱĴȱȱȱQTvsǯȱȱȱȱ¢ȱȱȱ ȱȱȱ Ȃȱ ȱěȱǻTgrtǼȱȱ¢ȱĴȱǻȱ Ǽǯȱ Tvst QTvs Tymtb Tgab Tta Tsptd Tpetd Thtd Tpbtd Tbhd Tbd Tsetd Tyocb West North Side, Mount Taylor Tpbta Tcptd 10,000 Tbta San Mateo Canyon La Mosca Canyon Toftb Toptb Tgrt unconformity Tpbtd Tpbtd QTvs QTvs QTvs Topta Kpl Kcg Qyxtb Totb 6,000 Kg Km Tymtb Tbta QTvs Kmf Tymtb Qal Qyqtb Qyxtb QTvs Tbtd Kcg Tyatb Kcg Qyxtb Toftc Toftc QTvs Kpl Kpl Kcda Kmm 10,000 Qyqtb Topta Totb Totb Tbd Tbtd Kmf Old ęȱ Mesa Chivato Seboyetita Creek Qyqtc Tbhd Tpta Tpta Tpetd Topta Tomtb Bend Qyatb Qyxtb Tbhtd Unnamed well (projected, no depth data) Tta Qyxtc 8,000 East 12,000 ft ASL 12,000 ft ASL Tcptd Tvst Trt B' Bend Trt Tls B Tbtd Ttd Trtl Cretaceous EL DADO MESA Menefee Formation— ȱȱȱ¢ ȱǰȱȱȱȱȱǰȱȱȱ¢ȱ ȱ ȱȱȱȱ ȱ£ȱ ȱǰȱȱȱǯȱȱȱȱȱȱ ȱȱ¢ȱǰȱ¢ȱęȬȱȱęȬȱȱȱȱĵȱȱȱȱǻǼǯȱ ȱȱȱȱȬȱȱȬȱȱǯȱȬȱ¢ȱȱȱȱǯȱ ȱȱȱ¢ȱ ¢ȱȱȱ ȱǯȱȱęȱȱȱ ȱȱȱ ȱȱŘŜŗŝŜŖȱřşŗŚśřŖȱǻȱ£ȱŗřǰȱŘŝǼǯȱ¡ȱ¡ȱȱȱŚśȱǯ Kmf Qal Qal J CERRO ALESNA Mesa Verde Group 17 J SAN LUCAS DAM Cretaceous ¢ȱȬȱ¢ȯǰȱȱĚ ȱȱȱ¢ȱȱȱ¢ȱȱȱ ȱȱȱȱśŖȱȱȱǰȱ¢ȱȱȱ ȱĚ ǯȱȱȱ¢ȱȱȱ ȱ ǰȱ ǰȱ ¢¡ǰȱ ¢¡ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ǰȱ ȱ ǰȱ ¢¡ȱ ȱ ęȱ ǯȱ ȱ ȱ ȱ ¢ȱ ǻǵǼȱ ȱ ĵǯȱ ȱ ȱ ȱ ȱ ǰȱ ǰȱ ¢¡ǰȱ ¢¡ǰȱǰȱȱȱǯȱȱQyxtb, QTvs and ThtdǲȱȱTcptdǯȱ ȱȱ ȱȱȱ¢ȱȱŸŴAr/ŷŽȱȱȱŘǯŜŞȱƹȱŖǯŖşȱǯȱ¡ȱ¡ȱȱȱŘśŖȱǯȱ Tpetd 3904000 Map Symbols 0 ¢ȱěȱȱ ȱȯȱȱȱǰȱȱ¢ȱǰȱĚ ȱȱȱǲȱȱȱ ȱ ȱ ¢ȱ ȱ ǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ǰȱ ǰȱ ǰȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ȱ ¢ȱ ȱ ¢ȱ ęȱ ȱ ¢ȱ ȱ ¢ȱȱȱǯȱȱȱȱĜȱȱȱȱ ȱ¢ȱȱȱȱȱ ȱȱȱȱȱȱȱȱȱ ȱǯȱȱQyxtb and overlies Kmfȱȱȱ ŚśŜȱȱȱȱȱǯȱȱȱȱ¢ȱĚ ȱȱȱȱȱȱȱȱȱ řǯŘŜȱƹȱŖǯŖŚȱȱǻ ěȱȱǯǰȱŘŖŖŞǼǯȱ¡ȱȱȱȱȱŗŖȱǯȱ Tgrt Slightly porphyritic biotite trachydacite—ǰȱȱ¢ȱĚ ȱȱȱ¢ȱ¢ȱ¢ȱȱ ȱȱȱȱȱȱȱǲȱȱŘȬŚƖȱ¢ȱȱǰȱ¢ȱǰȱ ǰȱ ȱ ¢¡ǯȱ Tpbtd, Tbd and Tymtbǲȱ ȱ ȱ Tptaǲȱ ȱ ¢ȱ Tbhd and TpbdiǲȱȱQTvs and Tpbtaǯȱȱȱȱǯȱ¡ȱȱȱȱȱŘŗśȱǯ Tbtd ȱȬȱȱ¢ȯ ¢ǰȱȱȱęȬȱ ȱȱȱȱȱ ȱȱǻQyptcǼȱȱȱȱ¢ȱȱȱȱȱ¢¡ǲȱȱ ǰȱ ȱ ĵȱ ¡¢ȱ ǻǂŗŖȱ Ǽǰȱ ȱ ¢ȱ ǰȱ ȱ ȱ ǻȱ ȱ ¢¡Ǽȱ ¡ȱ ǻǂŘŖȱ Ǽǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¡ȱ ȱ ȱ ȱ ǲȱȱȱȱȱȱȱQTvsȱȱ¡ȱ ȱȱĚ ǲȱȱȱĚ ȱ¢ȱ ȱȱQyqtbȱȱ ȱȱȱȱQyopb and QypobȱȱǲȱȱȱTvstǲȱȱȱȱ ȱȱȱ¡ȱȱŸŴAr/ŷŽȱȱȱŘǯřŖȱƹȱŖǯŗřȱǲȱ¡ȱ¡ȱȱȱĚ ȱȱǀŘśȱǯ Older aphyric trachybasalt— ¢ȱȱȱĚ ȱȱȱȱȱȱȱǻTotcǼȱȱȱ¢ȱ ȱ ¢ȱ ǯȱ ¢ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ¢ȱȱȱȱ¢¡ǯȱ¢ȱĚ ȱȱ¢ȱȱǰȱ¢¡ȱ ȱǯȱȱ¡ȱȱȱ¢¡ȱǯȱȱĚ ȱȱȱěȱȱȱȱȱ ȱȱ¢ȱȱȱȱȱǯȱȱȱȱȱȱǻTotdǼǯȱȱTvst, Qypob, Qyob and QyptbǲȱȱKmfǯȱȱȱĚ ȱȱȱȱȱŸŴAr/ŷŽArȱȱȱřǯřŗȱƹȱŖǯŖŞȱǯȱȱȱĚ ȱ ȱȱȱȱȱȱŸŴAr/ŷŽArȱȱȱřǯŘŖȱƹȱŖǯŖśȱǯȱȱ¡ȱȱȱȱȱŜŖȱǯ Totb Porphyritic trachyandesite, undivided— ȱ¢ȱȱǰȱȱȱǰȱ¢ȱȱȱ ¢ȱȱǰȱ¢¡ǰȱȱǰȱȱȱ¡ȱȱȱȱȱ¢ȱȱ ǲȱ¢ȱȱȱǰȱ¢¡ǰȱȱȱ¡ȱȱęȱǲȱ ȱȱ¡¢ȱ£ȱȱǲȱ¢ȱȱ¢ȱȱȬ¡ȱǯȱȱȱTpbtd, ȱ ȱTbhd, overlies Tbtdǰȱȱ¢ȱTcptdǯȱȱȱȱȱȱȱȱŸŴAr/ŷŽAr ȱȱŘǯŜřȱƹȱŖǯŖŝȱǲȱ¡ȱ¡ȱȱȱřřŖȱǯ Tpta Older sparsely porphyritic trachybasalt—ȱ ȱ ¢ȱ ȱ Ě ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ¡ȱȱȱȱȱǯȱ¡ȱȱȱȱ¢ȱǯȱ ȱ ȱ ǰȱ ǰȱ ȱ ǰȱ ȱ ¡ǰȱ ȱ ǯȱ ȱ ȱ ȱ ǯȱ ȱ ȱ Ě ȱ ǲȱ ȱ ¢ȱ QTvs, Tta, and Tbtaǲȱ ȱ ¢ȱ Tbhtdǯȱ ȱ ȱ ǯȱ ¡ȱ ¡ȱȱȱȱŗřŖȱǯ Toptb Porphyritic basaltic trachyandesite— ¢ȱ ȱ ǰȱ ǰȱ ¢ȱ ȱ ¢ȱ ȱ ȱ¢ȱȱ¢¡ǰȱȱȱȱǲȱȱȱȱTbtdǲȱȱȱ ǲȱ¡ȱȱȱȱŗŗŖȱǯ Tptba Older plagioclase trachybasalt— ȱȱȱĚ ȱ¡ȱȱ¢ȱĚ ȱȱȱȱȱȱȱ ǻToftcǼȱȱȱ¢ǰȱęȬȱ ȱȱȱȱȱȱȱǲȱȱȱ £ȱ ȱ ǰȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ¢¡ǯȱȱȱȱ¢ȱȱȱȱȱȱǻToftdǼǲȱȱȱĚ ȱȱȱȱ ȱȱȱȱȱȱȱȱ¢ȱQyxtbǯȱȱȱȱȱȬȱǰȱȱ QTvsȱȱȱȱȱȱ ȱ¢ȱQyxtbǯȱȱȱȱǲȱ¡ȱȱȱȱǂŗŖŖȱǯ Toftb Porphyritic biotite trachydacite— ¢ȱ ȱ ¢ ȱ ǰȱ ȱ ȱ ǰȱ ¢ȱ ¢ȱ ȱ ȱ ¢ȱ ȱ ǰȱ ¢¡ǰȱ ȱ ĵǰȱ ¡£ȱ ǰȱ ȱ ¡£ȱ ȱ ȱ ȱ ¡ȱ ȱ ǰȱ ęȱ ǲȱ ¢ȱ ȱ ȱ ǰȱĵȱȱȱ¡ǯȱȱȱTbtdȱȱvsǲȱȱ¢ȱȱQyatbǲȱȱȱǲȱ ¡ȱ¡ȱȱȱřśŖȱǯ Tbd Younger plagioclase olivine trachybasalt— ¢ȱȱȱĚ ȱȱȱȱȱȱȱǻQypoc) of ǰȱ Ȭȱ ȱ ȱ ȱ ǰȱ ¢ȱ ȱ ǻǂŚȱ Ǽǰȱ ȱ ȱ ȱ ȱ ǻǂřȱ Ǽȱ ȱ ȱ ȱ ¢¡ȱ ǻǂŗȱ Ǽȱ ¢ǯȱ ȱ ȱ ȱ ¢ȱ £ǯȱ ȱ ȱ ȱ ǰȱ ȱ Ȭȱ ȱ ǻQypodǼȱ ȱ ȱ ęȱ ȱ ȱ ¢ȱȱ¢ǯȱȱTvst, Qyob and QyptbǲȱȱQyopb and Qympbǯȱȱ ȱĚ ȱȱŸŴAr/ŷŽȱȱȱŘǯŘşȱƹȱŖǯŖŜȱǯȱ¡ȱ¡ȱȱȱȱŗŖŖȱǯ Older megacrystal trachybasalt— ȱȱȱĚ ȱ¡ȱȱȱȱȱȱ¢ȱȱȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ Ě ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǻTomtcǼȱ ȱ ęȬȱ ¢ǲȱȱȱȱ¡ȱȱȱȱ¢¡ȱȱȱ¢ǰȱȱ ĵȱ¡¢ǰȱȱȱȱȱȱǯȱȱȱȱȬȱȱǻTomtdǼǲȱ ȱȱĚ ȱȱȱȱȱ¢ȱȱȱȱ¢ȱĚ ǲȱ¢ȱȱȱȱ ȱToftb ǻȱ Ǽǯȱȱȱȱ¡ȱȱŘȬŚƖȱ¢ȱȱȱȱǻǂŜȱǼǰȱ ȱ ȱ ¢¡ȱ ǻǂśȱ Ǽǰȱ ȱ ȱ ǻǂŞȱ Ǽǰȱ ȱ ȱ ĵȱ ¡¢ȱ ǻǂŗŘȱ Ǽǲȱ ȱ ȱ ȱ ȱ ¢ȱ Ȭȱ ȱ ȱ ȱ ¢ȱ ¢ȱ QTvsǯȱ ȱ ȱ ȱ ǯȱ ¡ȱ ȱȱȱǀśśȱǯ Tomtb Porphyritic biotite hornblende trachydacite— ¢ȱ ȱ ȱ ¢ǰȱ ȱ ȱ ǰȱ ¢ȱ ¢ȱȱȱ¢ȱȱȱǻȱǼǰȱ¢¡ǰȱǰȱǰȱȱ ĵǰȱȱ ǰȱȱȱ¡ȱȱȱ¢ȱȱ¢ǰȱęȱǲȱ¢ȱ ȱȱ¢ȱǰȱȱ¢¡ȱȱȱ¡ǯȱȱȱ ȱȬȱȱȱȱȱ ȱ¡ȱȱȱȱ ȱȱȱȱȱǯȱȱȱTpta and Tbtdǲȱȱ ȱȱȱTtaǯȱȱȱȱǯȱ¡ȱ¡ȱȱȱřřśȱǯ Tbhd Younger porphyritic pyroxene olivine basalt— ¢ȱȱȱĚ ȱȱ¢ȱǰȱǰȱȱȱ Ȭȱ ¢ȱ ȱ ȱ ȱ ¢ȱ ǻśȬŗśƖǼȱ ȱ ȱ ȱ ȱ ȱ ¢¡ȱǻǂŚȱǼǰȱȱȱȱǻǂśȱǼȱȱȱȱ ǰȱ£ȱȱȱǻǂśȱ Ǽǯȱ ȱ ȱ ¢ȱ £ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ¢¡ǯȱ ȱ¢ȱȱȱȱȱȱ¡¢ȱĵǯȱȱTvst and QyobǲȱȱQftb and QytbǲȱȱȱȱȱǯȱȱȱĚ ȱȱŸŴAr/ŷŽȱȱȱŘǯřŗȱƹȱŖǯŖŜȱǯȱ¡ȱȱ ȱȱȱřŖȱǯ Older plagioclase basaltic trachyandesite— ȱȱ¢ȱ ȱȱȱ¢ȱȱȱȱ ȱȱǻŘȱǼǰȱȱȱȱ¢ǯȱȱ¢ȱȱȱ¢¡ȱȱ ȱ£ȱǯȱ ȱȱȱȱ¢ȱȱȱ¢ȱȱ ǰȱȱ¡ȱȱęȱǯȱ ȱȱQTvs and TvstǲȱȱTrtǲȱȱTbta and Tpbtdǯȱ ȱȱ ȱ£ȱ¢ȱȱ ȱȱȱȱȱȱŸŴAr/ŷŽȱȱȱŘǯŞŜȱƹȱŖǯŖŚȱǯȱ ¡ȱ¡ȱȱȱǂřśȱǯȱ Topta Porphyritic biotite trachydacite— ¢ȱ ȱ ¢ ȱ ǰȱ ȱ ȱ ǰȱ ¢ȱ ¢ȱ ȱ ȱ ¢ȱ ȱ ǰȱ ǰȱ ¢¡ǰȱ ȱ ȱ ȱ ȱ ȱ ¢ǰȱ ęȱ ǯȱ¢ȱȱȱ ǰȱȱȱȱ¡ǯȱȱȱ¢¡ȱ ȱ ¢¡ȱ ǲȱ ȱ ȱ ȱ ȱ Ȭ¢¡Ȭǯȱ ȱ ȱ ǰȱ ȬȱȱǻȱǵǼȱ¡ȱǻTpbtiǼȱȱ¢ȱȱȱȱ¢ȱȱ ȱȱ ȱ ȱ ȱǻȱǼǯȱȱȱQTvs, Tpta, Tbta, Tbtac and Tsetdǯȱȱȱȱ ȱŸŴAr/ŷŽȱȱȱŘǯŝŗȱƹȱŖǯŖřȱǯȱȱ¡ȱ¡ȱȱȱśŖŖȱǯ Tpbtd ȱęȬȱȱ¢ȯȱȱ¢ȱĚ ȱȱ¢ǰȱȱ¢ȱȱ ȱȱȱȱ¢ȱęȬȱǰȱ¢¡ǰȱȱȱǯȱ ȱȱȱ ęȱȱȱȱȱǯȱȱQycopb and Qyobǲȱ¢ȱȱQytbǯȱȱȱ Ě ȱȱŸŴAr/ŷŽȱȱȱŘǯŘŞȱƹȱŖǯŖŝȱǯȱ¡ȱȱȱȱȱŗŖȱǯ Coarse porphyritic trachydacite—ȱ ȱ ȱ ǰȱ ¢ȱ ȱ ¢ȱ ȱ ȱ ȱ ǻǂȱ řȱ Ǽȱ ¢ȱȱȱǯȱȱę¢ȱȱȱȱȱȱȱȱęȱ¢ȱ ǯȱ ȱ ¢ȱ ȱ ȱ ǰȱ ȱ ǰȱ ǰȱ ¡£ȱ ¢¡ǰȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ¢ȱ ȱ ǰȱ ȱ ǰȱ ¢¡ǰȱ ȱ ¡ȱȱęȱǯȱȱ ȱȱȬ¡ȱǯȱȱȱTpetdȱȱ¡ȱȱȱ ȱǯȱ ȱȱȱȱȱȱȱŸŴAr/ŷŽȱȱȱŘǯŞŘȱƹȱŖǯŖŚȱǯȱ¡ȱȱȱ ȱȱŞŖȱǯȱ Tcptd Hornblende trachydacite—ȱ ȱ ȱ Ě ȱ ȱ ¢ȱ ¢ȱ ȱ ¢ȱ ȱ ǰȱ¢¡ǰȱȱȱǲȱȱȱȱȱǻToptbǼȱȱȱȱȱ ǯȱ ȱ ȱ ȱ ¢ȱ ȱ ǻQTvsǼȱ ȱ ȱ Tbta and Tpbtdǯȱ ȱ ȱ ǯȱ ¡ȱȱȱ¢ȱŘŖŖȱǯ Thtd Younger olivine plagioclase trachybasalt— ȱȱȱȱĚ ȱ¡ȱȱȱȱȱȱ ȱȱȱȱ¢ȱȱǰȱ¢ȱ¢ȱȱȱȱȱȱȱȱǻQyopcǼǲȱ ȱ ȱ ȱ Ȭȱ ȱ ǻQyopdǼǯȱ ȱ ȱ ¢ȱ ¢ȱ ȱ ¢ȱ ȱ ¢ȱȱȱƹȱ¢¡ǰȱȱȱȱ¢ȱȱǯȱȱȱ¢ȱȱȱ ȱȱȱȱȱȱȱȱȱǯȱȱQyptb, Qypob, and QTvsǲȱ ȱQytb, Qyfpb and Qystbǯȱȱȱȱǯȱ¡ȱȱȱȱȱŜŖȱǯ Sugary enclave trachydacite—ȱȱ ȱȱȱȱȱȱȱȱ ȱȱȱȱ ȱ ¢ǯȱ ȱ ȱ ȱ ǻTsetdlǼȱ ȱ ȱ ȱ ¢ǰȱ ¢ǰȱ ¢ȱ ȱ ȱ ŗśȬŘŖƖȱ ¢ȱȱǰȱ¢¡ǰȱȱȱȱ ȱȱȱȱȱȱȱȱ ¢ȱȱȱ ȱǯȱȱȱȱȱȱ¢ȱȱ¢ȱ¢ȱ¢ȱǻTsetdu) ȱ¢ȱȱǰȱ¢¡ǰȱǰȱȱȱȱȱȱȱȱȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ¢ȱ ¡ǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ŗȱ ȱ Řȱ ǯȱ ǰȱ ȱ ǰȱ ¢¡ǰȱ ǰȱ ȱ ǻȱ Ĵȱ ȱ ¢ȱ ¡£Ǽǰȱ ȱ ȱ ¡ȱȱ£ȱ¢ǯȱ¡ȱȱ¢ǰȱ¢ǰȱȱęǯȱ¢ȱ ȱȱǰȱ¢¡ǰȱǰȱȱ¡ȱȱȱǯȱȱȱ¢ȱȱ ȱ¢ȱȱȱȱ¡ǰȱȱȱǰȱ¢¡ȱȱǯȱȱȱ¢ȱ ȱ ȱ ǯȱ ȱȱ QTvs, Tpbtd, and Tbtacǯȱ ȱ ȱ ȱ Ě ȱ ȱŸŴAr/ŷŽȱ ȱ ȱ Řǯŝŗȱ ƹȱ ŖǯŖŜȱ ǯȱȱ ¡ȱ¡ȱȱȱȱŘśŖȱǯ Tsetd Trachyandesite—ȱȱȱĚ ȱȱ¢ȱȱǰȱ¢ȱȱȱȱȱǯȱ¢ȱ ȱ ȱ ȱ ǰȱ ¡£ȱ ¢¡ǰȱ ¢ȱ ƹȱ ȱ ȱ ȱ ȱ ȱ ȱ ¡ȱȱȱ¢ȱȱǰȱ¢¡ǰȱǰȱȱ¡ǰȱȱ ęȱǯȱȱ ȱȱȬ¡ȱǯȱȱȱȱȱȱȱȱǯȱ ȱ ȱǯȱ¡ȱȱ ≤ŗŖŖȱǯȱ Tta Younger xenocrystal trachybasalt—ȱ ȱ ȱ ȱ Ě ȱ ¡ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱȱȱȱ¢ǰȱȬȱȱęȬȱ ȱȱȱȱȱȱȱǻQyxtcǼȱȱ ¢ȱ ȱ ¢ȱ ȱ ǰȱ ǰȱ ȱ ȱ ȱ ¢ȱ ȱ ¡ȱ ȱ ȱ ȱ ȱ ¡¢ȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ȱ ȱ ĵȱ ¡¢ǲȱ ȱ ȱ ¢ȱ ȱȱȱ¢ǰȱ¢ǰȱȱȱǯȱ ȱȱȱȬȱȱ ǻQyxtdǼǯȱȱĚ ȱȱǰȱȱȱ ǯȱ ȱȱȱQTvs,Tpetd, Toptb, Tvst, Tsptd, and Trtǯȱ ȱȱQyh, Qatb, and Qyqtbǯȱ ȱȱȱȱȱȱȱȱȱŸŴAr/ŷŽȱȱȱŗǯŝŚȱƹȱŖǯŖřȱ ȱǻ ȱȱǯǰȱŘŖŖşǼǯȱ ȱȱȱȱȱȱȱȱȱȱȱŸŴAr/ŷŽȱȱȱŗǯŝşȱƹȱŖǯŖśȱǯȱ ȱȱȱȱȱȱȱȱȱŸŴAr/ŷŽȱȱȱŗǯŞśȱƹȱŖǯŖŜȱǯȱ¡ȱȱȱĚ ȱȱǂŜŖȱǯȱ Porphyritic biotite hornblende trachydacite—ȱȱȱȱ ǰȱ¢ȱȱęȱȱȱ ¢ȱ ȱ ȱ ǻȱ Ǽǰȱ ǰȱ ǰȱ ȱ ȱ ȱ ¢¡ȱ ȱ ¢¡ȱ ȱ ¢ȱ ȱ ¢ȱ ȱ ǲȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ¢¡ǲȱ ȱ Toptbǲȱ ¢ȱ ȱ ¢ȱ Tbtaǲȱ ȱ ȱ ǲȱ ¡ȱ ¡ȱ ȱȱŗŖŖȱǯ Tbhtd Gabbro— ¢ǰȱęȬȱȱȱȱŝŖƖȱǰȱřŖƖȱǰȱ¢ȱ¢¡ȱȱ ȱ ¢ȱ ǲȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǻTytpcǼȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢£ȱȱȱTyocbǯȱŸŴAr/ŷŽȱȱȱŘǯŜŞȱƹȱŖǯŖŝȱǲȱ¡ȱ¡ȱȱ¢ȱŘśȱǯ Tgab Younger trachybasalt—ȱȱȱĚ ȱ¡ȱȱȱȱȱȱȱȱ¢ǰȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǻQytc) of ¢ȱ¢ȱȱ ȱǰȱ¢ȱ¢ȱ¢ȱȱȱƹȱǲȱ ȱȱȱȱ ȬȱȱǻQytdǼǲȱȱȱQyptb, Tbta, QTvs and Qycobǲȱȱ¢ȱQyfobǯȱȱȱQytb also ȱ ȱ ȱ ȱ Ě ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ Qycopb and apparently overlie Qftbǯȱ ȱȱȱȱȱȱĚ ȱȱǂŜŖȱȱǯ Porphyritic biotite trachyandesite— ȱȱȱȱ ȱęȱȱȱ¢ȱȱ ȱ ǰȱ ȱ ǰȱ ¢¡ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ¢ȱ ȱȱȱȱ¢¡ǯȱȱ¢ȱQTvs, Tbtd, Tymtb and Qyqtbǯȱȱȱȱǯȱ ¡ȱȱȱȱǃŗŜŖȱǯ Tpbta ȱ Ȭȱ ȯȱ ȱ ¢ȱ ȱ ȱ ȱ ǰȱ ȱ ȱ ¢¡ȱ ¢ǯȱ¡ȱȱǯȱ ȱȱǰȱǰȱǰȱȱ¡ǰȱȱǯȱ ȱ ȱȱǯȱ ȱȱȱǰȱ¢ȱ¡ȱȱȱȱȱȱȱ ǻTyoccǼȱȱȱȱǰȱȱ¢ȱȬȱȱǻTyocdǼǯȱȱǲȱȱQytb, Qyfob and Qyfpbǲȱȱ¢ȱȱȱQyfpdǯȱȱȱĚ ȱ ȱȱȱȱŸŴAr/ŷŽȱȱȱŘǯŜŝȱƹȱŖǯŗŘȱǯȱ¡ȱ ¡ȱȱȱȱśŖȱǯȱ Tyocb ȱ Ȭȱ ȱ ¢ȯ ¢ȱ ȱ ȱ Ě ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǻQympcǼȱȱȬȱȱȱǰȱ¢ǰȱȱ¢ȱȱȱȱ ¢ȱ¢ȱȱȱȱ¢¡ǲȱȱȱȱȱȱȱǲȱ ȱȱ¢ǰȱȱǲȱȱQyopbǯȱȱȱȱǯȱ¡ȱȱȱȱȱŜŖȱǯ Tbtac Younger megacrystal trachybasalt— ȱȱȱȱĚ ȱ¡ǯȱȱ¡ȱȱȱȱ Ě ȱȱȱ ȱȱȱàȱȱȱȱȱȱȱǲȱȱȱȱȱ¢ǰȱ ęȬȱ ȱȱȱȱȱȱȱǻTymtcǼȱȱȱ¢ȱȱȱȱǯȱ ¢ȱȱȱȱ ȱȱȱȱǻTymtdǼǯȱ¡ȱȱȱȱ¢ȱ¢ǯȱ ¢ȱ ȱ ȱ ǰȱ ¢¡ǰȱ ȱ ȱ ȱ ȱ ¡ȱ ȱ ǯȱ ȱ ȱTbtd and Tbtaǯȱȱ¡ȱȱȱȱȱȱȱȱȱȱȱȱȱȱĚ ȱȱ ¢ǰȱ ęȬȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǻTymtcǼȱ ȱ ¢ȱ ȱ ȱ ȱ ǯȱȱȱȱàȱȱȱŸŴAr/ŷŽȱȱȱŘǯŜŚȱƹȱŖǯŗŖȱǯȱȱȱĚ ȱȱǀřŖȱǯ Tymtb Tbta/Tbtac—Porphyritic basaltic trachyandesite, undivided— ¢ǰȱȱȱǰȱ¢ȱ¢ȱ ȱȱ¢ȱȱǰȱ¢¡ȱȱȱȱȱ¢ȱȱ¢ǰȱęȱ ǲȱ ¢ȱ ȱ ȱ ǰȱ ¢¡ȱ ȱ ȱ ¡ǲȱ ¢ȱ ȱ ȱ ĵȱ ¡¢ǲȱ ¢ȱ ȱ Ȭ¢¡Ȭȱ ǲȱ ȱ ¡ȱ ȱ ȱ Ȭ¡ȱ ¡ȱȱ ǯȱȱȱȱTbtacȱ¢ȱȱȱȱȱĚ ǯȱȱToptb and Tsetdȱȱȱ ȱǲȱ¢ȱȱQTvsǲȱȱTta, Tpbtd, and Qyatbǲȱȱȱǲȱ¡ȱ¡ȱ ȱȱŗŝŖȱǯ Tbta Porphyritic “Spud Patch” trachydacite—ȱȱ ȱȱǯȱȱȱȱǻTsptdlǼȱȱ¢ǰȱ¢ǰȱ ¢ȱȱ ȱŗśȬŘŖƖȱ¢ȱȱǰȱ¢¡ǰȱȱȱȱ ȱȱȱȱ ǯȱȱȱȱ ȱȱȱȬ ȱȱȱȱȱěǯȱȱȱȱȱȱ ¢ȱ ȱ ¢ȱ ¢ȱ ¢ȱ ǻTsptdsǼȱ ȱ ¢ȱ ȱ ǰȱ ¢¡ǰȱ ȱ ȱ ǰȱȱȱȱȱȱȱȱ¢ȱȱȱȱȱ¢ȱ¡ǯȱȱȱȱ ȱ ȱȱȬ ȱȱȱȱȱǯȱȱȱȱȱȱȱȱĚ ȱȱȱȱǯȱȱ ȱ ȱȱ ȱȱȱȱȱŗȱȱŘȱǯȱȱȬ¢¡Ȭȱǯȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ǻǀŗŖƖǼȱ ȱ ȱ ȱ ¡ǯȱ ǰȱ ȱ ǰȱ ¢¡ǰȱ ¢¡ǰȱ ¡£ȱ ȱ ȱ ǰȱ ȱ ȱ ¡ȱ ȱ ȱ ęȱ ¢ǯȱ¡ȱȱ¢ǰȱ¢ǰȱȱęǯȱ¢ȱȱȱȱȱ ȱ¢¡ǯȱȱQTvsǯȱȱȱȃȱȄȱȱȱ¢ȱȱ ¢ǯȱ ȱȱȱTsptd ȱŸŴAr/ŷŽȱȱȱŘǯśřȱƹȱŖǯŖŜȱǯȱ¡ȱ¡ȱȱ¢ȱŘŖŖȱǯ Tsptd Trachydacite—ȱ ¢ȱ ȱ ¡ȱ ȱ ¡ȱ ȱ ȱ ȱ ǲȱ ŗśȱ ȱ ŘŖƖȱ ¢ȱ ȱ ǰȱ ǰȱǰȱȱȱĵǯȱȱȱȱȱŘȱȱŞȱȱǯȱȱ¢ȱȱ¢¡ȱ ȱȱȱ ȱǯȱȱŗȱȱŘȱȱǰȱ¢ȱ¡ȱȱ ȱȱȱȱȱŗśȱȱȱȱȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ǯȱ ȱ ȱ ȱ ŗȱ ȱ řŖȱ ȱ ȱ ěȱ ȱ ȱ ǻTvstǼǯȱ ȱ ȱ ȱ ȱ QTvsǯȱ ȱ ȱ ȱ ȱ ȱ ¡ȱ ¡ȱ ȱȱȱŚŖȱǯ Ttd Tomtc Qyxtb 1:24,000 0.5 Landslide deposit—ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ £ȱ ¢ǯȱ ȱ ȱ ȱȱȱ¢ȱȱȱȱřȬŚȱȱǻȬ£Ǽȱȱȱȱȱȱȱȱȱ£ȱ ȱǯȱȱ¢ȱȱȱȱ ȱȱTvstȱǯȱȱȱȱȱȱȱȱ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ěȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ Ě ȱ interpreted to be TotbǯȱȱȱȱŜȱȱŗŘȱȱǯ Tls Volcaniclastic sedimentary rocks— ¢ȱȱȱȱ ȱȱĚ ǰȱĚȱȱȱȱěȱ ǻTvstǼȱȱȱȱȱ¢ȱȱȱ ǯȱȱĚ ȱȱȱȱȱȱ ȱǻȱȱ ȱȱȱǼȱȱȱ¢ȱȱȱȱȱȱȱȱ ȱ¢ȱȱ¢ȱȱȱȱȱ¡ǯȱȱȱȱȱȱȱȱȱ ȱ Ě ǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱǰȱ¢ȱȱǯȱěȱȱ¢ȱȱȱȱȱȱȱȱȱ ȱȱ ȱȱ¢ȱȱǰȱ¢¡ȱƹȱȱƹȱǯȱȱȱȱȱęȱ Ě ȱȱȱȱȱǯȱ¢ȱȱȱȱȱ¡ȱȱȱ¢ǲȱȱȱȱ ȱĚ ȱȱȱȱȱȱĚȱȱǯȱ¢ǯȱȱȱ ȱǰȱȱ¢ȱ¡ȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǲȱ ȱ ȱ ȱ ȱȱ ȱȱȱ¢ǯȱ¡ȱ¡ȱȱȱǁŘŖŖȱǯ QTvs Alluvial fans—¢¢ȱȬȱȱȱȱȱęȱȱȱǰȱǰȱȱ¢ȱ ȱȱȱȱ ȱȱ¢ǲȱȱ ȱȱȱȱ¢ȱȱǲȱȱȱȱȱȱ ȱǲȱ¢ȱ ȱȱȱȱȱǲȱ¢ȱȱȱ¢ȱǻQafy) and ȱǻQafoǼȱǲȱ¡ȱ¡ȱȱȱŗśȱǯ (Solid black square denotes dated unit) 1 Trtl Tertiary (Pliocene) Landslides—¢ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ǲȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ¢ȱ ǰȱ ȱ ȱ ȱ ȱ ǲȱ ȱ ȱ ȱ ȱ ¢ȱ ¢ȱ ȱ ȱȱȱȱȱǲȱȱ¢ȱȱ ȱȱȬȱȱȬǲȱȱ¢ȱ ¢ȱȱȱȱ£ȱȱȱȱȱǯ Correlation Diagram Base map from U.S. Geological Survey 1970, from photographs taken 1965, field checked in 1970, edited in 1993. 1927 North American datum, UTM projection -- zone 13N 1000-meter Universal Transverse Mercator grid, zone 13, shown in blue ¢ȱ ěȯȱ ȱ ȱ ¢ȱ ȱ ȱ Ĵȱ ȱ Tvstȱ ǲȱ ¢ȱ ȱ ȱ ȱ ǰȱ ǰȱ ȱ ¢¡ǰȱ ĵǰȱ ȱ ȱ ȱ ȱ ¡ȱ ǯȱ ȱ ȱ ȱ ȱȱ ȱȱȱȱȱŸŴAr/ŷŽȱȱȱřǯŖŞȱƹȱŖǯŘŖȱȱǻ ȱȱǯǰȱŘŖŖşǼǯȱ¡ȱ¡ȱ ȱȱǁŝśȱǯ Trt ȱ ęȱ ȱ ¢ȯ ¢ǰȱ Ȭȱ ȱ ęȬȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱǻQyfpcǼȱȱȱ¢ȱȱȱȱ¢ȱȱ¢ǯȱȱȱȱȱ ȱǯȱȱǰȱ ȱȱ¢ȱȱȱȱȱȱ¢ȱȱ¢ȱ¡ȱ ȱ ǻTgabǼǯȱ ȱ ȱ Qyfpdȱ ȱ Ě ȱ ȱ ȱ ȱ ǯȱ ȱ Tyocbǲȱ ȱ Qytb, Qystb and Qyqtbǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ŸŴAr/ŷŽȱ ȱ ȱ Řǯřŝȱ ƹȱ ŖǯŗŚȱ ǯȱ ¡ȱ ¡ȱ ȱȱȱȱȱŗśŖȱǯ Qyfpb ¢ȱěȯȱ¢ȱȱȱ¢ȱȱȱȱȱȱȱȱȱȱȱȱ QTvs ǲȱ ¢ȱ ȱ ȱ ǰȱ ¢¡ǰȱ ȱ ƹȱ ȱ ȱ ȱ ¡ȱ ǯȱȱȱȱȱȱȱ£ȱ¢ȱȱ ȱȱȱȱȱŸŴAr/ŷŽAr ȱȱŘǯŝşȱƹȱŖǯŖşȱǯȱȱȱȱȱȱTvstȱȱȱŘřşǰȱȱȱȱǰȱȱŸŴAr/ŷŽȱȱȱřǯŖŚȱ ƹȱŖǯŗŘȱǯȱ¡ȱ¡ȱȱȱǂȱŗśȱǯ Ttdt Tomtd Tpta Tpta Tomtb Ttdt 5 QTvs QTvs QTvs Qyxtc Tbtd Tbtd 35°15'0"N Qal Qal Tpta 85 QTvs Qal Qyxtb Qal 80 Tpta 262000 1.85 Ma 2.64 Ma Qyptb Tvst QTvs 15 45 70 Tcptd Tymtb Tbhd Tpta Tpetd Qal 3905000 Tomtb Qyxtb 25 Qal Qc Qyxtc Tbd 40 45 Tomtb 13 Qyqtb Tbta 5 QTvs Toftc Toftb Tta B' Toftb Toftc 6 Tpetd 3906000 60 Qal 5 10 5 Qal Qc Qyxtb Qycopb 3 1.26 Ma Qc 75 Qal Tsptdl Tbtac Thtd 7 8 QTvs QTvs 8 80 Qal Qftb QTvs Tyocb Tbta Tsptds 50 5 3904000 Qyopb Qytc QTvs Tsptdl Tsptds 30 15 QTvs Qal Tsptds 80 30 Toptb Qyfpb Qyfpc Tsptds Qyxtc Tsptdl 20 Tbta 55 Qyopd Qal Tsptdl 25 3 Qyopc 2.68 Ma 45 Tsetdu Tbhtd Tsptds Tsptdl Qal 75 10 Tgab 35°17'30"N 3908000 Tsptdl QTvs Qyxtb QTvs Qc Qyfpc Qyopb Totb QTvs Qal 2.67 Ma QTvs Qc Qyxtb 5 1.76 Ma Qyatb 2.53 Ma Qyhc Qc B Tyocb Qatc QTvs Qyxtc 3909000 Tymtb Qyxtc Qal Qyxtc 15 Qyfoc Qyh Qal Qystb Tymtc BG25-1-1 10 BK324-1-1 g Qytc Qytd Qal BK327-1-1 BK309 Qyxtd Qystc BG24-1-1 BK329-1-1 BK24 BK309-1-5 Ttdt Qyxtb BG4-1-1 BK320 Qyxtb Tsetdu Toftd Qal Qal Tvst 2.79 Ma 3905000 Qytc Qytb Qyfpb BK303 Qal 3907000 Toftc Tomtd FS 512G BK303 BK300 3906000 Qystb QTvs BK299 Trt Trt Tvst Qytd 3910000 ZO18 Trtl Tvst Toftb Toftd Tomtc QTvs Z013 Tvst Topta Qyfob BK58 QTvs Qal 3909000 Qal Tomtb Trt Qls Qc BK275 Trtl 2.86 Ma Qyfpb KB26 Z010 QTvs Qc 5 3911000 Qympb QTvs g Qyxtb g BK59 BK277 Tvst Qal QTvs Qal DH61-1 BK202 Z06 Z07 Qls 3908000 Qyptb Qyxtb Z05 Qympb Qal Qytb BK288 Tvst Qatb Qal QTvs KD1 Kmf Kmf Qal Qyptc Qyqtc La Trt KD64 gu n Qc BK138 KD3-2-1 HU4 BK292 Kmf Qyh 3912000 2.30 2.30 Ma Ma lt Qls Trtl Qyopd g J Qls Qympc Qyptb 40 Qal A' 10 30 Qypod Qypoc Qyopc HU6 35°17'30"N Qyopd Qal Tvst 3910000 Qyopb QTvs HU10 A 35°20'0"N Trt Trt QTvs HU11 Qal Qal J HU22 Trt Totb J Tgrt 3912000 3913000 Qal Qal Qyqtb Qls 35°20'0"N Qal Tvst QTvs Qyxtb 3913000 Tvst Qc Younger olivine trachybasalt— ¢ȱȱȱĚ ȱȱȱȱȱȱȱǻQyocǼȱȱęȬȱ ȱȱŘȬŚƖȱȱȱ¢ȱǻǂśȱǼȱȱ¢ȱȱȱǯȱȱȱ ȱ¢ȱ£ǯȱȱȱȱȱȱȱȱ¢ǯȱ ȱȱȱȱȬȱȱǻQyodǼǯȱȱȱȱȱȱęȱȱȱȱȱ ȱ ȱ ȱ ȱ ¢¡ȱ ¢ǯȱ ȱ Tvst and apparently Totbǲȱ ȱQypob, Qftb and QcopbǯȱȱȱĚ ȱȱŸŴAr/ŷŽȱȱȱŘǯŗŞȱƹȱŖǯŖŜȱǰȱȱȱȱȱ ¢ȱȱęȱ¢ȱȱȱȱȱǯȱ¡ȱȱȱȱȱŝŖȱǯ Qyob Volcanic Rocks of Mount Taylor, Southern Mesa Chivato and Vicinity Qal Qyxtb Tvst 3914000 Qal Qal 3.20 Ma Kmf Qls Qls Quaternary 3917000 Qycopb 10 Totb Tvst 3916000 Qal Qycopb Qes 2.18 Ma Tvst Qc Kmf Qytb Qycopb 2.31 Ma Qal ȱȱ Qycopb Qal Qyob Qc Kmf Qyob Totb Qal 107°30'0"W 272000 3.31 Ma Qal Qes 271000 Qycopb Qls Qafy Qafy 270000 Tvst Qls Qc Qc Qafy 3917000 Tvst 107°32'30"W 268000 Kcg Kcs Kmm Toftb QTvs Kcda Kmm Kcs 8,000 Kcs Kcdi Tpbti Tta ? Kg Tymtb Km Kcdi Kg Kd Kcdi Kd Jbb + Jwc Kd Jbb + Jwc Km Jbb + Jwc 6,000 Toftb Qyqtb Kmf 4,000 4,000

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