U.S. DEPARTMENT OF THE INTERIOR OPEN-FILE REPORT O3-293 U.S. GEOLOGICAL SURVEY Sheet 5 of 5 science for a changing world

118° 00' 117° 00' 34° 30' S 34° 30' u

B n s i e g G Hill 4001 t

R C Apple Valley ANI o TE M ve Carr Deadman OUN k TAIN Canyon e Point S e H r C o l Fifteenmile co mb Juniper R l k Point S id a A ge e Hills N c s e M Rabbit Valyermo A e Big John r O Dry Lake P N M

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ta n M x t C in h r A e e North Peak ek y F Troop Mt Baden- D

o Rattlesnake R White Mtn Cloudburst Peak C Mojave River

r Powell Oak Wrightwood O Mountain

k a Forks Reservoir Summit Circle j Spring S.G. River o Cajon Summit Dam South Peak Iron Fork Mtn n D e e p

Waterman Road South Fork Wright e Luna Mtn P C Mtn r v k North Fork C a Mtn a Dawn a e o i n j Burnt C Lizard p ri e O'Day Cyn Pine t e y o Flats r r Ck Spring e F o xey o C e r rk L n k Co Hopi Flats R on Squaw M e r Pine e y C Spring id Peak e k e l w Little g v Mount San Mtn n o M e i P i l Crystal l Pine Flat S A N i a Cox Ck n i Shay Mtn R Antonio e Cajon K l Lake Junction W o Vincent Thrust Ca Cajon n Redonda n C ey Muddy Ridge y l e g h R i d g e Alpine on o r n Mount C Spring Little

Silverwood Marie Louise k Shay Mtn Cyn No l r CLE Lake H eek e th GHORN olcomb Cr i n G A B R I E L r y

b Devils C F Cosy Dell a r o FAULT Hole ate Telegraph rk SAN BERNARDINO G w Blue Cut d Peak Butler Peak S A N l L Cedar Pines k o o C n Iceh C Park C ou w s B a s Lake G e k Midd e G a

A S le e F D B or r L o R I E L F A U L Cyn k b Arrowhead a

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S. Scotland y v H Cogswell We ork G t C

st F . Riv. l i Crestline Gregory

e e y l Reservoir g H n Heaps Peak n L Cow Can d y C E r y y i Cucamonga t L e o R le r MOUNTAINS n e E v Peak San Sevaine D E V I L Monrovia Pine Mtn i C o C e N i C San Gabriel n k A C N R r D Lookout r W Y O N L T Peak a y D e P F A U M O U N T A I N S t R y Reservoir o a e e Devore a

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Reservoir e o T S Keller Peak a

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I E S i N G A d D g Keller Cliffs M O S R y R B A i R n A Peak C n t M u A D U E i

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F A U L T Z O N E C H A P C il S S ls Bradbury L A F MIL y N A L CR t U EE le L K FA Duarte C T U Glendora LT r Z O Monrovia e J N Azusa e A E s k C S San Bernardino Seven k E - c C I a o G N Highland Oaks Dam l A a n b j T s L Rialto o O B La Verne n n Cram Peak i Upland B ta Rancho R C e n M i r u Cucamonga al r n i v e k o E Fontana to e R r e e Ganesha S - e a Cr ipa M S C k a uca Park el o W n r Y ge i A lt A Rid br o a d ill a n s M G T h a i e t n s n r Slover n l a Ontario r o l d S a Hill a F i n c S A ills H s a Guasti e U B n H e ge Pomona L S a to s n T an s af reek o Ra in r C J r Elephant C n ula Crestmore n a ns Hill a T le S eni im G m R k s n P S Grand o a Yucaipa ee E e t O ll etw Terrace eo Dunlap i y b G B c Z ndar h O u s N Hills M H d bo ill A o e N Acres ferre H Blue x E Yucaip In lt te R ins La Lo o a Valley e Fau uen Jurupa Mounta C W t P Jose Mtn u S a a

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S U L A Highgrove in g P N P E N I Riverside s s 34° 00' 34° 00' 118° 00' 117° 00'

Rocks of the Peninsular Ranges Rocks of the Rocks of the San Bernardino Mountains Rocks bounded by Mission Creek segment assemblage. South of the quadrangle, assemblage. Includes basement (mostly assemblage. Includes basement (mostly of San of the Andreas Fault Zone, and the offset Peninsular Ranges rocks occur east concealed by Quaternary deposits) that is concealed by Quaternary deposits) of the Mill Creek Fault of the San Jacinto Fault offset by the San Jacinto Fault Mojave Desert, which is similar to San Bernardino Mountains basement

Figure 1. Map of San Bernardino 30' X 60' quadrangle showing place names used in Description of Map Units, Regional Synthesis, and Geologic Notes. Colored areas define structural assemblages. Approximate locations of most faults having large displacements or lengths are shown. Inferred boundary between Peninsular Ranges and San Gabriel Mountains assemblages is hidden beneath thick Quaternary deposits, and its location and character are highly speculative. Town or geographic feature; Mountain Peak.

SAN JUAQUIN A C VALLEY AD O R A SIERRANEV A S T N M O G J A V E S E

San Bernardino D 30' X 60' quadrangle E S E R T T R A N S V E R S E

R A N P A G E S C I F I C C P O E L N O O I N R A N C S D R U O E A N L A G D A E N E R S S E R T

Figure 2. Map showing San Bernardino 30' X 60' quadrangle in relation to physiographic provinces in southern . Within the quadrangle, provinces and province boundaries do not conform to the rock assemblages designated in the geologic notes accompanying the DESCRIPTION OF MAP UNITS.

Digital Preparation by: Source of Mapping: Source of Mapping: Source of Mapping: K.R. Bovard Kenney, M.D., 1999 Miller, F.K., Matti, J.C., Barrows,1980 P.M. Cossette Digital Preparation by: 2001a G.W. Patt Source of Mapping: alley Sour P.M. Cossette Morton, D.M. and Miller, F.K., unpublished reconnaissance Digital Preparation B ce of Mapping: V arro mapping and air photo interpretation ws, 1985 by: Digital Preparation by: P.M. Cossette P.M. Cossette alley Digital Preparation by: ifteenmileV Source of Mapping: alyermo Phelan P.M. Cossette Hesperia South F Cox and others, 1983 uniper Hills V R.M. Alvarez Baldy Mesa Apple DigitalJ Preparation by: Mescal Creek V. Diep P.M. Cossette 1 Source of Mapping: Source of Mapping: e Source of Mapping: e Miller, F.K., Matti, J.C., Morton, D.M., Woodburne,eak Morton, D.M., Unpublished 3 M.O., and Foster, J.H., 2001 mapping; Foster, J.H., 1980; Brown, H.J., 2001 Source of Mapping: Digital Preparation by: Weldon, R.J, 1986;. Meisling, Mount Baldy—Morton, D.M., U.S. Geological Survey, mapping Miller, F.K., Unpublishedwhead eak P.M. Cossette K.E., 1984; Woodburne, done 1988-1999, scale, 1: 24,000; Nourse, J.A., California State Source of Mapping: Source of Mapping: reconnaissance mapping Digital Preparation by: Source of Mapping: Digital Preparation by: M.O. and Golz, D.J, 1972 ood Lak Polytechnic University, Pomona, mapping done 1997-2001, scale, Crowder, D.F., 1966 Weldon, R.J, 1986;. P.M. Cossette Ehlig, P.L., Unpublished mapping, Nourse, P.M. Cossette Cajon 1:24,000; Ehlig, P.L., mapping done 1955-2001, scale, 1:24,000 C. Koukladas Digital Preparation by: Meisling, K.E., 1984 Arro Digital Preparation by: J.A., Unpublished mapping, Morton,Mount D.M.,Antonio San erw Digital Pre eparation by: aterman Mtn P.M. Cossette 4 Mount Baldy—Morton, D.M., Matti, J.C., U.S. Geological Survey, P.M. Cossette UnpublishedCrystal mapping Lak P.M. Cossette W elegraph P C. Koukladas Butler P mapping done 1988-1999, scale, 1:24,000 T Silv 3 Lak San Bernardino North—Matti, J.C., Quaternary mapping done 2000. U.S. Geological Survey, scale, 1: 24,000. (not included in Source of Mapping: Source of Mapping: Source of Mapping: Source of Mapping: published map) Morton, D.M. and Matti, J.C., Nourse, J.A., Unpublished mapping Morton, D.M. and Matti, J.C., Miller, F.K. and Matti, J.C., Source of Mapping: Digital Preparation 2001b Morton, D.M., Unpublished mapping 2001a 2001b. Matti, J.C., unpub- Miller, F.K., Morton, D.M., and Matti, J.C., Harrison Mtn—Miller, F.K., Morton, D.M., and Matti, J.C., Ehlig, P.L., Unpublished mapping by: lished Quaternary mappimg Mapping done 1988-1999, 2000-2001. U.S. Geological Survey, G.W. Patt Unpublished mapping eak Source of Mapping: scale, 1:24,000 P.M. Cossette Digital Preparationore by: Source of Mapping: Digital Preparation by: Digital Preparation by: Jacobs, S.E., 1982 P.M. Cossette Morton, D.M.,Azusa 1973 P.M. Cossette eak P.M. Cossette Digital Preparation Keller Peak—Miller, F.K., Morton, D.M., and Matti, J.C., Mapping C. Koukladas P G.L. Morton done 1988-1999, 2000-2001. U.S. Geological Survey, scale, 4 Dev Digital Preparation by: ellerby: P Glendora P.M. Cossette North 1:24,000 Digital Preparation by: Cucamonga P.M. Cossette G.W. Patt 2 1 Mount Baldy K 1 San Bernardino Harrison Mtn P.M. Cossette Crystal Lake—Ehlig, P.L., mapping done 1955-1985, California State University, Los Angeles, scale 1:24,000; Nourse, J.A., mapping done 1996-2001, California State Polytechnic University, Source of Mapping: Source of Mapping: Pomona, scale, 1:24,000; Morton, D.M., U.S. Geological Survey, Source of Mapping: Source of Mapping: Source of Mapping: Tan, Siang S., 1998b Morton, D.M., and Matti, J.C., mapping done 1990-1997, scale, 1:24,000 Tan, Siang S., 1998a Morton, D.M. and Matti, J.C., Unpublished Morton, D.M., Unpublished Source of Mapping: Sheldon, J.S., 1955 Unpublished mapping ark mapping and aerial photograph interpretation mapping Matti, J.C. and Morton, D.M., Unpublished Morton, 1978b Morton 1978a mapping Mount San Antonio—Ehlig, P.L., mapping done 1955-1985, Digital Preparation by: California State University, Los Angeles, scale 1:24,000; Nourse, Digital Preparation by: Digital Preparation by: K.R. Bovard Digital Preparation by: J.A., mapping done 1996-2001, California State Polytechnic C. Koukladas K.R. Bovard Digital Preparation by: Digital Preparation by: P.M. Cossette P.M.Cossette University, Pomona, scale, 1:24,000; Morton, D.M., U.S. P.M. Cossette P.M.Cossette K.R. Bovardontana P.M. Cossette Ontario P.M.Cossette G.L. Morton ucaipa Geological Survey, mapping done 1990-1997, scale, 1:24,000 Guasti Redlands Y San Dimas F South Baldwin P 1 Mount San Antonio—Morton, D.M., U.S. Geological Survey, San Bernardino mapping done 1980-1990, scale, 1:24,000 Cajon—Morton, D.M., U.S. Geological Survey, mapping done 1980- 1999, scale, 1:24,000 REFERENCES UNPUBLISHED MAPPING 3 Silverwood Lake—Miller, F.K. and Morton, D.M., mapping done Barrows, A.G., 1980, Geologic map of the San Andreas Fault Zone, scale, 1:24,000. 1996-2001, U.S. Geological Survey, scale, 1:24,000 Juniper Hills and vicinity, Los Angeles County, California: Morton, D. M., 1973, Geology of parts of the Azusa and Mount Wilson Ontario—Morton, D.M. and Matti, J.C., Mapping and aerial California Division of Mines and Geology Open-File Report 80-2 quadrangles, San Gabriel Mountains, Los Angeles County, Lake Arrowhead—Miller, F.K., reconnaissance mapping done photograph interpretation done 1990-1999. U.S. Geological L.A., scale, 1:9,600. California: California Division of Mines and Geology Special 2000-2001, U.S. Geological Survey, scale, 1:24,000 Survey, scale, 1:24,000 Barrows, A.G., 1985, Geologic map of the San Andreas Fault Zone, Los Report 105, 21 p. Angeles County, California: California Division of Mines and Morton, D.M., 1978a, Geologic map of the San Bernardino South 7.5' Juniper Hills—Morton, D.M. and Miller, F.K., reconnaissance Guasti—Morton, D.M. and Matti, J.C., Mapping and aerial Geology Open-File Report 85-10 LA, scale, 1:9,600. quadrangle, San Bernardino and Riverside Counties, California: mapping and air photo interpretation done 1999-2001, U.S. photograph interpretation done 1990-1999. U.S. Geological Cox, B.F., Powell, R.E., and Hinkle, M.E., 1983, Mineral resource U.S. Geological Survey Open-File Report 78-20, scale, 1:24,000. Geological Survey, scale, 1:24,000 Survey, scale, 1:24,000 potential map of the Pleasant View Roadless Area, Los Angeles Morton, D.M., 1978b, Geologic map of the Fontana 7.5' quadrangle, County, California: Miscellaneous Field Studies Map MF-1649-A, San Bernardino and Riverside Counties, California: U.S. Valyermo—Morton, D.M. and Miller, F.K., reconnaissance Fontana—Morton, D.M., Mapping and aerial photograph scale, 1:62,500. Geological Survey Open-File Report 78-19, scale, 1:24,000. mapping and air photo interpretation done 1999-2001, U.S. interpretation done 1990-1999. U.S. Geological Survey, scale, Crowder, D.F., 1967, Mineral Resources of the Devil Canyon-Bear Morton, D.M. and Matti, J.C., 2001a, Digital geologic map of the Geological Survey, scale, 1:24,000 1:24,000 Canyon Primitive Area, California: U.S. Geological Survey Cucamonga Peak 7.5' quadrangle, San Bernardino County, Bulletin 1230-G, 21 p., scale, 1:62,500. California: U.S. Geological Survey Open-File Report 01-311, Mescal Creek—Morton, D.M. and Miller, F.K., reconnaissance San Bernardino South—Morton, D.M. and Matti, J.C., Mapping Foster, J.H., 1980, Late Cenozoic evolution of Cajon Valley, southern scale, 1:24,000. mapping and air photo interpretation done 1999-2001, U.S. and aerial photograph interpretation done 1990-1999. U.S. California: Riverside, University of California, Ph.D. Thesis, 235 p. Morton, D.M. and Matti, J.C., 2001b, Digital geologic map of the Geological Survey, scale, 1:24,000 Geological Survey, scale, 1:24,000 Jacobs, S.E., 1982, Geology of a part of the upper Santa Ana River Devore 7.5' quadrangle, San Bernardino County, California: U.S. Valley, San Bernardino Mountains, San Bernardino, California: Geological Survey Open-File Report 01-173, scale, 1:24,000. Phelan—Morton, D.M. and Miller, F.K., reconnaissance mapping Redlands—Matti, J.C. and Morton, D.M., Mapping done 1978- Riverside, University of California, M. S. Thesis, 235 p. Morton, D.M., Woodburne, M.O., and Foster, J.H., 2001, Digital and air photo interpretation done 1999-2001, U.S. Geological 1998. U.S. Geological Survey, scale, 1:24,000 Kenney, M.D., 1999, Emplacement, offset history, and recent uplift of geologic map of the Telegraph Peak 7.5' quadrangle, San Survey, scale, 1:24,000 basement within the San Andreas Fault System, northeast San Bernardino County, California: U.S. Geological Survey Open-File Yucaipa—Matti, J.C. and Morton, D.M., Mapping done 1978- Gabriel Mountains, California: Eugene, Oregon, University of Report 01-293, scale, 1:24,000. Baldy Mesa—Morton, D.M. and Miller, F.K., reconnaissance 1998. U.S. Geological Survey, scale, 1:24,000 Oregon, Ph.D. Thesis, 357 p. Tan, Siang S., 1998a, Digital geologic map of the Baldwin Park 7.5' mapping and air photo interpretation done 1999-2001, U.S. Meisling, K.E., 1984, Neotectonics of the north frontal fault system of quadrangle, Los Angeles County, California: California Geological Geological Survey, scale, 1:24,000 Azusa—Morton, D.M., U.S. Geological Survey, mapping done the San Bernardino Mountains, : Pasadena, Survey Open-File Report OFR-98-30, scale, 1:24,000 1990-1997, scale, 1: 24,000; Nourse, J.A., California State California, California Inst. of Technology, Ph.D. Thesis, 394 p. Tan, Siang S., 1998b, Digital geologic map of the San Dimas 7.5' Hesperia—Morton, D.M. and Miller, F.K., reconnaissance Polytechnic University, Pomona, mapping done 1997-2001, scale, Miller, F.K. and Matti, J.C., 2001a, Digital geologic map of the quadrangle, Los Angeles County, California: California Geological mapping and air photo interpretation done 1999-2001, U.S. 1:24,000 Fifteenmile Valley 7.5' quadrangle, San Bernardino County, Survey Open-File Report OFR-98-31, scale, 1:24,000 Geological Survey, scale, 1:24,000 California: U.S. Geological Survey Open-File Report 01-132, Shelton, J.S., 1955, Glendora volcanic rocks, Los Angeles Basin, Glendora—Morton, D.M., U.S. Geological Survey, mapping done scale, 1:24,000. California: Geol. Soc. Amer. Bull., v. 66, n. 1, p. 45-89. Apple Valley South—Morton, D.M. and Miller, F.K., 1990-1997, scale, 1: 24,000; Nourse, J.A., California State Miller, F.K. and Matti, J.C., 2001b, Digital geologic map of the San Weldon, R.J., 1986, The late Cenozoic geology of Cajon Pass; reconnaissance mapping and air photo interpretation done 1999- Polytechnic University, Pomona, mapping done 1997-2001, scale, Bernardino North 7.5' quadrangle, San Bernardino County, implications for tectonics and sedimentation along the San Andreas 2001, U.S. Geological Survey, scale, 1:24,000 1:24,000 California: U.S. Geological Survey Open-File Report 01-131, Fault: Pasadena, California, California Inst. of Technology, Ph.D. scale, 1:24,000. Thesis, 400 p. 2 Glendora—Bezore, S.P., California Geological Survey, mapping Miller, F.K., Matti, J.C., and Brown, H.J., 2000, Digital geologic map of Woodburne, M. O., and Golz, D. J., 1972, Stratigraphy of the done 1997-1999, scale, 1:24,000. Compiled area also includes the Butler Peak 7.5' quadrangle, San Bernardino County, Punchbowl Formation, Cajon Valley, southern California: published mapping by Shelton, J.S. 1955 Figure 3. Data sources used for compilation of San Bernardino 30' X 60' quadrangle California: U.S. Geological Survey Open-File Report 00-145, Berkeley, University of California Publications in Geological Sciences, v. 92, 73 p.