276000 276000 277000 277000 278000 278000 279000 279000 280000 280000 281000 281000 282000 282000 283000 283000 4207000 4208000 4208000 4209000 4209000 4210000 4210000 4211000 4211000 4212000 4212000 4213000 4213000 4214000 4214000 4215000 4215000 38°00’ 119°30’ ? ? ? ? 30 83 12 41 53 86 47 28 78 61 73 49 60 63 54 70 82 45 55 62 75 62 84 35 80 81 65 55 60 44 80 44 35 29 40 52 56 61 30 85 70 61 79 86 86 84 77 79 74 63 75 78 65 42 68 57 68 48 82 80 78 74 62 42 74 45 57 74 86 83 81 78 88 82 73 87 84 90 76 57 90 72 88 90 85 78 84 81 82 90 84 85 82 79 74 90 81 72 38 82 78 74 83 68 28 75 70 84 60 55 88 83 68 86 60 81 80 85 68 82 78 85 88 80 84 88 77 47 34 54 77 34 86 70 83 84 85 86 72 47 80 76 58 58 59 37 48 41 63 50 48 63 73 51 32 32 75 35 25 34 56 46 53 47 25 82 56 59 52 48 43 41 54 42 68 49 46 78 68 87 84 63 86 79 71 77 41 70 54 46 71 59 74 86 73 88 88 82 57 82 55 55 25 42 22 16 24 46 36 58 16 80 36 14 55 38 25 63 37 54 43 41 50 55 58 40 35 36 79 41 39 53 50 42 56 72 65 81 73 85 86 73 83 90 71 75 77 87 84 85 78 85 71 88 75 78 84 85 80 76 77 80 65 89 80 76 24 77 89 88 19 68 81 87 85 75 70 85 58 78 64 76 74 64 78 84 82 90 83 79 89 77 79 88 70 84 78 90 45 65 88 70 74 76 78 55 77 80 75 80 80 67 68 90 76 82 68 80 67 55 75 60 60 80 85 55 79 85 74 76 69 80 68 81 89 89 46 82 88 88 90 85 87 87 86 87 88 87 88 88 82 87 88 85 88 87 88 89 83 88 85 85 87 87 85 83 84 86 82 71 76 71 78 62 77 79 53 64 76 72 74 88 88 86 82 76 85 75 63 90 87 88 85 82 87 90 68 89 88 82 81 84 85 73 68 83 86 73 76 88 80 80 84 70 70 80 60 85 84 85 85 85 75 84 80 85 84 88 80 88 65 80 84 88 80 62 85 88 88 81 88 32 60 86 88 85 88 84 88 82 70 68 80 72 80 76 88 85 74 83 80 70 72 87 86 88 84 87 73 77 82 79 89 86 78 72 83 73 74 80 82 80 71 75 86 85 60 80 80 90 88 77 85 85 88 65 80 72 76 87 70 88 88 79 87 72 88 81 87 87 83 89 89 90 84 81 80 70 85 76 88 43 85 72 82 77 82 88 88 84 86 80 80 82 80 76 70 70 80 80 85 88 89 70 82 82 88 79 82 62 88 78 88 80 90 90 83 80 83 72 88 82 87 86 85 80 67 86 81 90 80 75 88 83 80 87 88 80 87 86 88 87 83 79 86 89 86 88 85 89 89 89 81 89 84 83 89 89 85 81 86 83 79 77 80 80 80 78 86 88 87 87 86 90 84 81 86 86 86 88 87 86 89 88 89 88 87 87 85 88 89 85 89 83 88 88 85 85 88 87 88 86 88 84 84 87 88 83 89 82 88 82 83 89 87 87 85 83 86 88 88 84 ! ! ! ! 93.0 Ma 91.5 Ma 88.1 Ma 87.5 Ma A B Geologic Map of the Benson Lake Pendant western Yosemite National Park, central Sierra Nevada Geology by V. Memeti , S.R. Paterson , R. Economos , *3 *4 S. Erdmann , R.B. Miller *1 University of Southern California, Los Angeles *2 University of California, Los Angeles *3 Dalhousie University, Halifax, Canada *4 San Jose State University, San Jose *1 *1 *2 0 0.5 1 km Topographic base from USGS 7.5 minute quadrangles Piute Mountain, Matterhorn Peak, Tuolumne Meadows, Ten Lakes 1000 m UTM Grid, Projection NAD 1927, zone 11S 10000 9600 9200 8800 8400 8000 7600 7200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 [m] [ft] A B 2200 2300 2400 2500 2600 2700 2800 2900 3100 3000 [m] DZ DZ 70 87 Quaternary - alluvium, colluvium Cathedral Peak granodiorite Tuolumne Intrusive Complex (95-85 Ma) porphyritic Half Dome granodiorite equigranular Half Dome granodiorite transitional Kuna Crest/Half Dome granodiorite Kuna Crest granodiorite Yosemite Valley intrusive suite (102 Ma) diorite-gabbro mingled gabbroic to granodioritic rocks granites of the Yosemite Valley intrusive suite undifferentiated leucogranite in the mingling zone El Capitan biotite granite and pendant xenoliths pendant units (Precambrian to Cambrian) calcsilicate and marble metapelite and metapsammopelite white quartzite Explanation Contacts and structures sharp contact with orientation gradational contact inferred contact fault major fold hinge (antiform) mingled El Capitan granite and mafic rocks Foliations S IIS IIS 2 1 0 magmatic foliation magmatic foliation with subsolidus overprint main foliation pendant Kcp Kphd Kehd Ktkc Kkc Kyvd Kyvmd Kyvmg Kyvlg Kyvg Kyvx pЄ-Єmp pЄ-Єq pЄ-Єm Geochronology CA-ID-TIMS U/Pb zircon ages in the Tuolumne intrusion analyzed by R. Mundil and J. Matzel at the Berkeley geochronology center DZ detrital zircon age sample locations of Memeti et al. (2010) 70 interpolated magmatic foliation traces in cross section pЄ-Єq pЄ-Єmp pЄ-Єq Kcp Kphd Kehd Ktkc Kkc Kyvmd Kyvmg Kyvlg Kyvmd pЄ-Єm Kyvg Kyvx Kyvd ! Kcp Kphd Kehd Ktkc Kkc Kyvg pЄ-Єq pЄ-Єq pЄ-Єq pЄ-Єq pЄ-Єq pЄ-Єmp pЄ-Єmp Q Q Q Q Kyvg Kyvx pЄ-Єq pЄ-Єq pЄ-Єmp pЄ-Єmp Kyvmd Kcp Kphd Kehd Ktkc Kkc DIGITAL MAP AND CHART SERIES DMCH013 DOI: 10.1130/2012.DMCH013 Published by The Geological Society of America, Inc. 3300 Penrose Place • P.O. Box 9140 Boulder, Colorado 80301-9140 ©2012 The Geological Society of America Memeti, V., Paterson, S.R., Economos, R., Erdmann, S., and Miller, R.B., compilers, 2012, Geology of the Benson Lake Pendant, Western Yosemite National Park, Central Sierra Nevada: Geological Society of America Digital Map and Chart Series 13, doi:10.1130/2012.DMCH013. For permission to copy, contact [email protected]. ©2012 The Geological Society of America. All rights reserved.
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! 93.0 Ma
91.5 Ma88.1 Ma
87.5 Ma
A
B
Geologic Map of the Benson Lake Pendantwestern Yosemite National Park,central Sierra NevadaGeology by V. Memeti , S.R. Paterson , R. Economos ,
*3 *4S. Erdmann , R.B. Miller
*1University of Southern California, Los Angeles*2University of California, Los Angeles*3Dalhousie University, Halifax, Canada*4San Jose State University, San Jose
*1 *1 *2
0 0.5 1 km
Topographic base from USGS7.5 minute quadrangles PiuteMountain, Matterhorn Peak, Tuolumne Meadows, Ten Lakes1000 m UTM Grid, Projection NAD 1927, zone 11S
10000
9600
9200
8800
8400
8000
7600
72000 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 [m]
[ft]
A B
2200
2300
2400
2500
2600
2700
2800
2900
3100
3000
[m]
DZ
DZ
70
87
Quaternary - alluvium, colluvium
Cathedral Peak granodiorite
Tuolumne Intrusive Complex (95-85 Ma)
porphyritic Half Dome granodiorite
equigranular Half Dome granodiorite
transitional Kuna Crest/Half Dome granodiorite
Kuna Crest granodiorite
Yosemite Valley intrusive suite (102 Ma)
diorite-gabbro
mingled gabbroic to granodioritic rocks
granites of the Yosemite Valley intrusive suiteundifferentiated
leucogranite in the mingling zone
El Capitan biotite granite and pendant xenoliths
pendant units (Precambrian to Cambrian)
calcsilicate and marble
metapelite and metapsammopelite
white quartzite
Explanation
Contacts and structures
sharp contact with orientation
gradational contact
inferred contact
fault
major fold hinge (antiform)
mingled El Capitan granite and mafic rocks
Foliations
S IIS IIS2 1 0
magmatic foliation
magmatic foliation with subsolidus overprint
main foliation pendant
Kcp
Kphd
Kehd
Ktkc
Kkc
Kyvd
Kyvmd
Kyvmg
Kyvlg
Kyvg
Kyvx
pЄ-Єmp
pЄ-Єq
pЄ-Єm
Geochronology
CA-ID-TIMS U/Pb zircon ages in the Tuolumne intrusion analyzed by R. Mundil and J. Matzel at the Berkeley geochronology center
DZdetrital zircon age sample locationsof Memeti et al. (2010)
70
interpolated magmatic foliationtraces in cross section
pЄ-Єq
pЄ-Єmp
pЄ-Єq
Kcp
Kphd
Kehd
Ktkc
Kkc
Kyvmd
Kyvmg
Kyvlg
Kyvmd
pЄ-Єm
Kyvg
Kyvx
Kyvd
!
Kcp
Kphd
Kehd
Ktkc
Kkc
Kyvg
pЄ-Єq
pЄ-Єq
pЄ-Єq
pЄ-Єq
pЄ-Єq
pЄ-Єmp
pЄ-Єmp
Q
Q
Q
Q
Kyvg Kyvx
pЄ-Єq pЄ-ЄqpЄ-Єmp
pЄ-Єmp Kyvmd
Kcp
Kphd
KehdKtkcKkc
DIGITAL MAP AND CHART SERIES DMCH013DOI: 10.1130/2012.DMCH013
Published byThe Geological Society of America, Inc.3300 Penrose Place • P.O. Box 9140Boulder, Colorado 80301-9140
©2012 The Geological Society of America
Memeti, V., Paterson, S.R., Economos, R., Erdmann, S., and Miller, R.B., compilers, 2012, Geology of the Benson Lake Pendant, Western Yosemite National Park, Central Sierra Nevada: Geological Society of America Digital Map and Chart Series 13, doi:10.1130/2012.DMCH013. For permission to copy, contact [email protected]. ©2012 The Geological Society of America. All rights reserved.
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