Geologic Map of the Bodie Hills, California and Nevada

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What does this data set describe?

Title: Geologic Map of the Bodie Hills, California and Nevada
Abstract:: The Bodie Hills cover about 1,200 km2 straddling the California-Nevada state boundary just north of Mono Lake in the western part of the Basin and Range Province, about 20 km east of the central Sierra Nevada. The area is largely underlain by the partly overlapping, middle to late Miocene Bodie Hills volcanic field and Pliocene to late Pleistocene Aurora volcanic field. Upper Miocene sedimentary deposits, mostly basin-filling sediments, gravel deposits, and fanglomerates, lap onto the west, north, and east sides of the Bodie Hills, where they cover the older Miocene volcanic rocks. Quaternary surficial deposits, including extensive colluvial, fluvial, glacial, and lacustrine deposits locally cover all older rocks. Miocene and younger rocks are gently tilted. These rocks contain several sets of high-angle faults that change through time from conjugate sets of northeast-striking left-lateral and north-striking right-lateral oblique-slip faults in rocks older than about 9 Ma to north- and northwest-striking dip-slip faults in late Miocene rocks. The youngest faults are north-striking normal and northeast-striking left-lateral oblique-slip faults that cut Pliocene-Pleistocene rocks. Numerous hydrothermal systems were active during Miocene magmatism and formed extensive zones of hydrothermally altered rocks and several large mineral deposits, including gold- and silver-rich veins in the Bodie and Aurora mining districts

How should this data set be cited?
David A. John, Edward A. du Bray, Stephen E. Box, Pet, 2015, Geologic Map of the Bodie Hills, California and Nevada: Scientific Investigation Map SIM 2015-3318, U.S. Geological Survey, Menlo Park, CA.
Online Links:
- <https://dx.doi.org/10.3133/sim3318>
What geographic area does the data set cover?

West_Bounding_Coordinate: -119.256318

East_Bounding_Coordinate: -118.743731

North_Bounding_Coordinate: 38.449341

South_Bounding_Coordinate: 38.056974
What does it look like?
Does the data set describe conditions during a particular time period?

Beginning_Date: 2007
Ending_Date: 2014
Currentness_Reference: publication date
What is the general form of this data set?

Geospatial_Data_Presentation_Form: vector digital data
How does the data set represent geographic features?
1. How are geographic features stored in the data set?
  This is a Vector data set. It contains the following vector data types (SDTS terminology):
  - G-polygon (1344)
2. What coordinate system is used to represent geographic features?
  
  Grid_Coordinate_System_Name: Universal Transverse Mercator
  
  Universal_Transverse_Mercator:
  
  UTM_Zone_Number: 11
  
  Transverse_Mercator:
  
  Scale_Factor_at_Central_Meridian: 0.999600
  
  Longitude_of_Central_Meridian: -117.000000
  
  Latitude_of_Projection_Origin: 0.000000
  
  False_Easting: 500000.000000
  
  False_Northing: 0.000000
  
  Planar coordinates are encoded using coordinate pair
  Abscissae (x-coordinates) are specified to the nearest 50.000000
  Ordinates (y-coordinates) are specified to the nearest 50.000000
  Planar coordinates are specified in meters
  
  The horizontal datum used is D_WGS_1984.
  The ellipsoid used is WGS_1984.
  The semi-major axis of the ellipsoid used is 6378137.000000.
  The flattening of the ellipsoid used is 1/298.257224.

How does the data set describe geographic features?

polygons

geologic map unit (Source: Authors)

OBJECTID

Internal feature number. (Source: ESRI)

Sequential unique whole numbers that are automatically generated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

ptype

Rock Unit Label (Source: Fitzgibbon and Wentworth (1993))

Value	Definition
md	Tailings and mine dumps
Qtt	Travertine hot springs deposits
Qtf	Tufa deposits
Qal	Alluvium
Qes	Eolian sand deposits
Qf	Fan deposits
Ql	Lacustrine deposits
Qgd	Glacial deposits
Qpd	Pediment deposits
Qpl	Playa deposits
Qt	Talus deposits
Qog	Older gravel deposits
Qmsa	Trachyandesite of Mud Spring
Qaca	Trachyandesite of Aurora Crater
Qta2	Trachyandesite 2
Qta1	Trachyandesite 1
Qa	Andesite
Qmh	Trachyandesite of Mount Hicks
Qacc	Trachyandesite of Cow Camp Creek
QTai	Trachyandesite
QTopb	Olivine pyroxene basaltic trachyandesite
QTob	Olivine basaltic trachyandesite
QTaap	Trachyandesite south of Aurora Peak
QThch	Hornblende trachydacite of Cedar Hill
Tmr	Rhyolite of Martinez Hill
Tdap	Trachydacite of Aurora Peak
QTbbc	Basaltic debris flow deposits of Cedar Hill
Tbch	Trachybasalt of Cedar Hill
Tpch	Pyroxene trachyandesite of Cedar Hill
Tba	Basaltic trachyandesite of Beauty Peak
Thd	Hornblende trachydacite
Trsp	Rhyolite of Spring Peak
Tach	Trachyandesite of Cedar Hill
Tmlp	Basaltic andesite of Locomotive Point
QTsn	Sinter deposits
Tsm	Sedimentary rocks of Martinez Hill
Tyg	Younger gravel deposits
Tswr	Sedimentary rocks of the East Walker River
Tog	Older gravel deposits
Tfv	Sedimentary deposits of Fletcher Valley
Tev	Eureka Valley Tuff
Tjs	Tuff of Jacks Spring
Tbar	Rhyolite of Big Alkali
Twa	Trachyandesite of Willow Springs
Ths	Dacite of Hot Springs Canyon
Tdcc	Trachydacite of Cinnabar Canyon
Tppd	Debris flows associated with trachydacite of Potato Peak
Tpp	Trachydacite of Potato Peak
Tdsd	Debris flows associated with dacite of Silver Hill
Tisd	Intrusive phase of dacite of Silver Hill
Tsd	Dacite of Silver Hill
Tbai	Trachydacite intrusions of Mount Biedeman
Tsmb	Sedimentary rocks and debris flows of Mount Biedeman
Tamb	Trachyandesite of Mount Biedeman
Tpst	Sedimentary rocks and tuff of Paramount
Trbh	Rhyolite of the Bodie Hills
Trb	Rhyolite of Bald Peak
Trbc	Rhyolite of Bodie Creek
Tac	Trachyandesite of Aurora Canyon
Tec	Trachydacite of East Canyon
Tsbr	Silicified breccia
Trs	Rhyolite of Rock Springs Canyon
Tdm	Trachyandesite of Del Monte
Tdbc	Trachydacite of Bridgeport Canyon
Trdc	Rhyolite of Del Monte Canyon
Tr	Pyroxene rhyolite
Treb	Rhyolite of East Brawley Peak
Tra	Rhyolite of Aurora Creek
Tdi	Trachydacite intrusions
Tcc	Trachyandesite of Clark Canyon
Twbi	Trachyandesite intrusion of West Brawley Peak
Twba	Trachyandesite of West Brawley Peak
Trwi	Basalt of Rancheria plug
Trwa	Basaltic trachyandesite of Rancheria
Trcd	Trachydacite of Rough Creek
Thai	Hornblende trachyandesite intrusions
Taai	Trachyandesite intrusion of Aurora
Tadi	Dacite intrusions of Aurora
Taa	Trachyandesite of Aurora
Tals	Andesite of Lakeview Spring
Tamg	Trachyandesite of Masonic Gulch
Tasc	Trachyandesite of Sinnamon Cut
Tams	Trachyandesite of Mud Spring Canyon
Tma	Trachyandesite of Masonic
Tmai	Trachyandesite intrusions of Masonic
Tabo	Trachyandesite of Borealis
Kgdr	Monzogranite of Rattlesnake Gulch
Kgm	Granodiorite of Masonic Mountain
Kgmc	Monzogranite of Murphy Creek
Kpm	Granite of Powell Mountain
Kqmd	Quartz monzodiorite of Aurora
Ksm	Quartz monzonite of Sinnamon Meadow
Kmgd	Quartz monzodiorite of Masonic Mountain
Mzmv	Metavolcanic rocks
Jmm	Quartz monzodiorite of Mormon Meadow
Mzsv	Metasedimentary and metavolcanic rocks
Pzms	Metasedimentary rocks

GeoAge

Rock Geologic Age (Source: <http://www.geosociety.org/science/timescale/timescl-2009.pdf>)

Value	Definition
Cretaceous	66.5 to 145.5 Ma
Cretaceous or Jurassic	66.5 to 201.6 Ma
Holocene	0 to 10 Ka
Holocene and (or) Pleistocene	0 to 2.6 Ma
Jurassic?	99.6 to 145.5 Ma?
Mesozoic	66.5 to 251 Ma
Miocene	5.3- 23 Ma
Paleozoic	251 to 542 Ma
Pleistocene	.001 to 2.6 Ma
Pleistocene and (or) Pliocene	.01 to 5.3 Ma
Pliocene	2.6 to 5.3 Ma
Pliocene and (or) Miocene	2.6 to 23 Ma

Group

Rock Group (Source: Authors)

Value	Definition
Surficial Deposits	Assorted Quaternary sedimentary deposits divided by age and processes
Rocks of the Aurora Volcanic Field	Quaternary-to Miocene-aged post subduction volcanic rocks associated with the Aurora Volcanic suit.
Sedimentary Deposits	Sedimentary deposits of Pleistocene to Miocene age intercalated with volcanic units.
Distally-sourced ash-flow tuffs	Volcanic tuff derived from outside the Bodie Hills region
Rocks of the Bodie Hills volcanic field.	Miocene-aged volcanic field is a continental margin arc sequence
Pre-Bodie Hills Volcanic field	Miocene-aged volcanic rocks of Pre Bodie Hills ages
Basement Rocks	Plutonic and metamorphic rocks ranging in age from Cretaceous to Paleozoic

Shape_Length

Length of feature in internal units. (Source: ESRI)

Positive real numbers that are automatically generated.

Shape_Area

Area of feature in internal units squared. (Source: ESRI)

Positive real numbers that are automatically generated.

Arcs

geologic map unit (Source: Authors)

OBJECTID

Internal feature number. (Source: ESRI)

Sequential unique whole numbers that are automatically generated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

ltype

Line type (Source: Authors)

Value	Definition
contact	Boundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact may or may not have been observed, but the location is constrained to be within about 2 mm at map scale (1:50,000) or within about 100 meters on the ground.
fault	Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy.
fault, approximately located	Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2 mm at map scale (1:50,000) or within about 100 meters on the ground.
fault, concealed	A planar surface of rupture along which geologic units have been fractured and then displaced
fault, inferred	Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 5 mm at map scale (1:50,0000) or within about 250 meters on the ground. The existence of the fault is inferred from structural and stratigraphic relationships observed elsewhere.
fault, questionable	Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, and its existence is questionable
landslide scarp	Head or main scarp of landslide

Labels

geologic map unit (Source: Authors)

OBJECTID

Internal feature number. (Source: ESRI)

Sequential unique whole numbers that are automatically generated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

ptype

Rock Unit Label (Source: Fitzgibbon and Wentworth (1993))

Value	Definition
md	Tailings and mine dumps
Qtt	Travertine hot springs deposits
Qtf	Tufa deposits
Qal	Alluvium
Qes	Eolian sand deposits
Qf	Fan deposits
Ql	Lacustrine deposits
Qgd	Glacial deposits
Qpd	Pediment deposits
Qpl	Playa deposits
Qt	Talus deposits
Qog	Older gravel deposits
Qmsa	Trachyandesite of Mud Spring
Qaca	Trachyandesite of Aurora Crater
Qta2	Trachyandesite 2
Qta1	Trachyandesite 1
Qa	Andesite
Qmh	Trachyandesite of Mount Hicks
Tacc	Trachyandesite of Cow Camp Creek
Ta	Trachyandesite
Topb	Olivine pyroxene basaltic trachyandesite
Tob	Olivine basaltic trachyandesite
Taap	Trachyandesite south of Aurora Peak
Thdch	Hornblende trachydacite of Cedar Hill
Tmr	Rhyolite of Martinez Hill
Tdap	Trachydacite of Aurora Peak
Tbbch	Basaltic debris flow deposits of Cedar Hill
Tbch	Trachybasalt of Cedar Hill
Tpach	Pyroxene trachyandesite of Cedar Hill
Tba	Basaltic trachyandesite of Beauty Peak
Thd	Hornblende trachydacite
Trsp	Rhyolite of Spring Peak
Tach	Trachyandesite of Cedar Hill
Tmlp	Basaltic andesite of Locomotive Point
QTsn	Sinter deposits
Tsm	Sedimentary rocks of Martinez Hill
Tyg	Younger gravel deposits
Tswr	Sedimentary rocks of the East Walker River
Tog	Older gravel deposits
Tfv	Sedimentary deposits of Fletcher Valley
Tev	Eureka Valley Tuff
Tjs	Tuff of Jacks Spring
Tbar	Rhyolite of Big Alkali
Twa	Trachyandesite of Willow Springs
Ths	Dacite of Hot Springs Canyon
Tdcc	Trachydacite of Cinnabar Canyon
Tppd	Debris flows associated with trachydacite of Potato Peak
Tpp	Trachydacite of Potato Peak
Tdsd	Debris flows associated with dacite of Silver Hill
Tisd	Intrusive phase of dacite of Silver Hill
Tsd	Dacite of Silver Hill
Tbai	Trachydacite intrusions of Mount Biedeman
Tsmb	Sedimentary rocks and debris flows of Mount Biedeman
Tamb	Trachyandesite of Mount Biedeman
Tspt	Sedimentary rocks and tuff of Paramount
Trbh	Rhyolite of the Bodie Hills
Trb	Rhyolite of Bald Peak
Trbc	Rhyolite of Bodie Creek
Tac	Trachyandesite of Aurora Canyon
Tec	Trachydacite of East Canyon
Tsbr	Silicified breccia
Trs	Rhyolite of Rock Springs Canyon
Tdm	Trachyandesite of Del Monte
Tdbc	Trachydacite of Bridgeport Canyon
Trdc	Rhyolite of Del Monte Canyon
Tr	Pyroxene rhyolite
Treb	Rhyolite of East Brawley Peak
Tra	Rhyolite of Aurora Creek
Tdi	Trachydacite intrusions
Tcc	Trachyandesite of Clark Canyon
Twbi	Trachyandesite intrusion of West Brawley Peak
Twba	Trachyandesite of West Brawley Peak
Trwai	Basalt of Rancheria plug
Trwa	Basaltic trachyandesite of Rancheria
Trcd	Trachydacite of Rough Creek
Thai	Hornblende trachyandesite intrusions
Taai	Trachyandesite intrusion of Aurora
Tadi	Dacite intrusions of Aurora
Taa	Trachyandesite of Aurora
Tals	Andesite of Lakeview Spring
Tamg	Trachyandesite of Masonic Gulch
Tasc	Trachyandesite of Sinnamon Cut
Tams	Trachyandesite of Mud Spring Canyon
Tma	Trachyandesite of Masonic
Tmai	Trachyandesite intrusions of Masonic
Tabo	Trachyandesite of Borealis
Kgdr	Monzogranite of Rattlesnake Gulch
Kgm	Granodiorite of Masonic Mountain
Kgmc	Monzogranite of Murphy Creek
Kpm	Granite of Powell Mountain
Kqmd	Quartz monzodiorite of Aurora
Ksm	Quartz monzonite of Sinnamon Meadow
Kmgd	Quartz monzodiorite of Masonic Mountain
Mzmv	Metavolcanic rocks
Jmm	Quartz monzodiorite of Mormon Meadow
Mzsv	Metasedimentary and metavolcanic rocks
Pzms	Metasedimentary rocks

GeoAge

Rock Geologic Age (Source: <http://www.geosociety.org/science/timescale/timescl-2009.pdf>)

Value	Definition
Cretaceous	66.5 to 145.5 Ma
Cretaceous or Jurassic	66.5 to 201.6 Ma
Holocene	0 to 10 Ka
Holocene and (or) Pleistocene	0 to 2.6 Ma
Jurassic?	99.6 to 145.5 Ma?
Mesozoic	66.5 to 251 Ma
Miocene	5.3- 23 Ma
Paleozoic	251 to 542 Ma
Pleistocene	.001 to 2.6 Ma
Pleistocene and (or) Pliocene	.01 to 5.3 Ma
Pliocene	2.6 to 5.3 Ma
Pliocene and (or) Miocene	2.6 to 23 Ma

Group

Rock Group (Source: Authors)

Value	Definition
Surficial Deposits	Assorted Quaternary sedimentary deposits divided by age and processes
Rocks of the Aurora Volcanic Field	Quaternary-to Miocene-aged post subduction volcanic rocks associated with the Aurora Volcanic suit.
Sedimentary Deposits	Sedimentary deposits of Pleistocene to Miocene age intercalated with volcanic units.
Distally-sourced ash-flow tuffs	Volcanic tuff derived from outside the Bodie Hills region
Rocks of the Bodie Hills volcanic field.	Miocene-aged volcanic field is a continental margin arc sequence
Pre-Bodie Hills Volcanic rocks	Miocene-aged volcanic rocks of Pre Bodie Hills ages
Basement Rocks	Plutonic and metamorphic rocks ranging in age from Cretaceous to Paleozoic

Structures

geologic map unit (Source: Authors)

OBJECTID_12

Internal feature number. (Source: ESRI)

Sequential unique whole numbers that are automatically generated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

Unit

Rock unit measured (= ptype in polygon feature class) (Source: Authors)

Value	Definition
Rock unit listen in item ptype of polygon feature class

Strike

the strike of a surface is the azimuthal direction of a hypothetical line formed by the intersection of the surface with an imaginary horizontal surface, as measured in the direction that the observer is facing the hypothetical surface (for example, an axial surface of a fold or a plane of foliation). The geologic surface may be horizontal, inclined, vertical, or overturned (Source: FGDC Document Number FGDC-STD-013-2006)

Range of values
Minimum:	0
Maximum:	360

Dip

the dip of a surface is the angle of departure of that surface downward from horizontal, as measured (Source: FGDC Document Number FGDC-STD-013-2006)

Range of values
Minimum:	0
Maximum:	90

Type

Type of structure measured (Source: Authors)

Value	Definition
MM Foliation	Metamorphic Foliation: Aligned layers of minerals characteristic of some metamorphic rocks
bedding	Sedimentary layers in a rock. The beds are distinguished from each other
compaction foliation	foliation in tuff due to weight of overlying material
vertical compaction foliation	foliation in tuff due to weight of overlying material
dike	A sheet-like or tabular-shaped igneous intrusion that cuts across the sedimentary layering, metamorphic foliation, or other texture of a pre-existing rock
vertical dike	A sheet-like or tabular-shaped igneous intrusion that cuts across the sedimentary layering, metamorphic foliation, or other texture of a pre-existing rock.
flow banding	mineral or textural layering in volcanic rocks due to rheological flow
vertical flow banding	mineral or textural layering in volcanic rocks due to rheological flow

Descriptio

Field description of unit being measured (Source: Authors)

descriptive text derived from field notes

Vents

geologic map unit (Source: Authors)

OBJECTID_1

Internal feature number. (Source: ESRI)

Sequential unique whole numbers that are automatically generated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

Name

Name of geographic feature (Source: Authors)

landslides

geologic map unit (Source: Authors)

OBJECTID

Internal feature number. (Source: ESRI)

Sequential unique whole numbers that are automatically generated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

ptype

Polygon type (Source: Authors)

Value	Definition
Qls	Landslide of Quaternary age

Shape_Length

Length of feature in internal units. (Source: ESRI)

Positive real numbers that are automatically generated.

Shape_Area

Area of feature in internal units squared. (Source: ESRI)

Positive real numbers that are automatically generated.

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- David A. John, Edward A. du Bray, Stephen E. Box, Peter G. Vikre, James J. Rytuba, Robert J. Fleck, and Barry C. Moring
Who also contributed to the data set?
To whom should users address questions about the data?

David A. John
USGS
Geologist
Mail Stop 901
Menlo Park, CA 94025
USA

650.329.5424 (voice)
djohn@usgs.gov

Hours_of_Service: 9 to 5

Why was the data set created?

This database and accompanying plot files depict the distribution of geologic materials and structures at 1:50,000 scale. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide hazards, mineral potential, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the scale of this report does not provide sufficient detail for site development purposes. In addition, this map does not take the place of fault-rupture hazard zones designated by the California State Geologist. Similarly, although numerous landslides are mapped, the database does not identify or delineate all landslides in the map area or their present states of activity.

How was the data set created?

From what previous works were the data drawn?
Chesterman and Gray (1975) (source 1 of 6)

Chesterman, C.W., and Gray, C.H., Jr., 1975, Geology of the Bodie 15-minute quadrangle, Mono County, California: Map Sheet 21, California Division of Mines and Geology, Sacramento, CA.

Type_of_Source_Media: paper

Source_Scale_Denominator: 48,000

Source_Contribution: Geologic framework

Dohrenwend (1981) (source 2 of 6)
Dohrenwend, J. C.,, 1981, Reconnaissance surficial geologic map of the Trench Canyon quadrangle, California and Nevada: Open-File Report OFR 81-1155, U.S. Geological Survey, Menlo Park, CA.
Online Links:
- <http://ngmdb.usgs.gov/Prodesc/proddesc_11897.htm>
Type_of_Source_Media: paper

Source_Scale_Denominator: 62,500

Source_Contribution: Quaternary faults and surficial units
Dohrenwend (1982) (source 3 of 6)
Dohrenwend, J.C., 1982, Reconnaissance surficial geologic map of the Aurora quadrangle, California and Nevada: Miscellaneous Field Studies Map MF-1373, US Geological Survey, Menlo Park CA.
Online Links:
- <http://ngmdb.usgs.gov/Prodesc/proddesc_7056.htm>
Type_of_Source_Media: paper

Source_Scale_Denominator: 62,000

Source_Contribution: Quaternary faults and surficial units
Dohrenwend and Brem (1982) (source 4 of 6)
Dohrenwend, J.C., and Berm, G.F, 1982, Reconnaissance surficial geologic map of the Bridgeport quadrangle, California and Nevada: Miscellaneous Field Studies Map MF-1371, US Geological Survey, Menlo Park, CA.
Online Links:
- <http://ngmdb.usgs.gov/Prodesc/proddesc_7054.htm>
Type_of_Source_Media: paper

Source_Scale_Denominator: 62,500

Source_Contribution: Quaternary faults and surficial units
Stanford Geological Survey, 1961 (source 5 of 6)
Survey, Stanford Geological , 1961, Stanford Geological Survey, 1961, Geologic map of Swauger Creek-Masonic Mountain area, Mono County,: Stanford Geologic Survey Map 1961, Stanford University, Stanford CA.
Online Links:
- <http://www-sul.stanford.edu/depts/branner/images/maps/JamesGsmith-BIG.jpg>
Type_of_Source_Media: paper

Source_Scale_Denominator: 31,680

Source_Contribution: Geologic framework
Smailbegovic, Amer (2002) (source 6 of 6)

Smailbegovic, Amer, 2002, Structural and lithologic constraints to mineralization in Aurora, NV and Bodie, CA mining districts, observed and interpreted with aerospace geophysical data: University of Nevada, Reno Ph.D. Thesis Smailbegovic thesis, University of Nevada, Reno, NV.

Type_of_Source_Media: paper

Source_Scale_Denominator: 24,000

Source_Contribution: Geologic framework
How were the data generated, processed, and modified?
Date: 11-Apr-2014 (process 1 of 4)
Metadata imported.
Data sources used in this process:
- C:\DOCUME~1\moring\LOCALS~1\Temp\2\xml49.tmp
Date: 14-Apr-2014 (process 2 of 4)
Metadata imported.
Data sources used in this process:
- C:\DOCUME~1\moring\LOCALS~1\Temp\2\xmlF.tmp
Date: 14-Apr-2014 (process 3 of 4)
Metadata imported.
Data sources used in this process:
- C:\DOCUME~1\moring\LOCALS~1\Temp\2\xml15.tmp
Date: 26-Jan-2015 (process 4 of 4)
Metadata imported.
Data sources used in this process:
- C:\DOCUME~1\moring\LOCALS~1\Temp\2\xml7.tmp
What similar or related data should the user be aware of?
John, D.A., du Bray, Blakely, R.J., Box, S., 2011, Geologic Map of the Bodie Hills Volcanic Field, California and Nevada: Anatomy of Miocene Cascade Arc Magmatism in the Western Great Basin [abs.]: Eos Transactions AGU, V13C-2625, AGU.
Online Links:
- <http://adsabs.harvard.edu/abs/2011AGUFM.V13C2625J>
John, D.A., du Bray, E.A., Box, S.E., Blake, 2012, Cenozoic Magmatic and Tectonic Evolution of the Ancestral Cascade Arc in the Bodie Hills, California and Nevada: Insights from Integrated Geologic Geophysical, Geochemical and Geochronologic Studies [abs.]: Eos Transactions AGU, V33B-2860, AGU.
Online Links:
- <http://abstractsearch.agu.org/meetings/2012/FM/sections/V/sessions/V33B/abstracts/V33B-2860.html>
Kingdon, S., Cousens, B., John, D.A., and du, 2013, Pliocene to late Pleistocene magmatism in the Aurora Volcanic Field, Nevada and California, USA [abs.]: Eos Transactions AGU V13G-2700, AGU.
Online Links:
- <http://adsabs.harvard.edu/abs/2013AGUFM.V13G2700K>
John, D.A., du Bray, E.A., Blakely, R.J., F, 2012, Miocene magmatism in the Bodie Hills volcanic field, California and Nevada: A long-lived eruptive center in the southern segment of the ancestral Cascades arc: Geosphere V. 8 n.1 p 44-97, Geological Society of America, Bolder, CO.
Online Links:
- <http://geosphere.gsapubs.org/content/8/1/44.abstract>
du Bray, E.A., John, D.A., Box, S.E., Vikre, P, 2013, Petrographic and geochemical data for Cenozoic volcanic rocks of the Bodie Hills, California and Nevada: U.S. Geological Survey Data Series 764, 10 p., US Geological Survey, Denver, CO.
Online Links:
- <https://pubs.usgs.gov/ds/764/>
du Bray, E.A., John, D.A., and Cousens, B.L., 2014, Petrologic, tectonic, and metallogenic evolution of the southern segment of the ancestral Cascades magmatic arc, California and Nevada: Geosphere v. 10, p. 1-39., GSA, Boulder, CO.

Other_Citation_Details:
Online_Linkage <http://geosphere.gsapubs.org/content/10/1/1.abstract>

How reliable are the data; what problems remain in the data set?

How well have the observations been checked?
How accurate are the geographic locations?
Well-located data items are intended to have a horizontal positional accuracy within 1 mm at 1:50,000 scale, or within 50 meters on the ground. The relative positional accuracy of each line in the database is indicated within the LTYPE field in the Arc Attribute Table (see below). Points in the database are generally considered to be well located. The position of each data item is derived from the USGS topographic base map, and therefore additional inaccuracies arising from inaccuracies in the base map may also be encountered.
How accurate are the heights or depths?
Where are the gaps in the data? What is missing?
The report is intended to describe completely the surficial deposits and bedrock geology at 1:50,000 scale. Geologic information only mappable at larger scales has been omitted.
How consistent are the relationships among the observations, including topology?
This data set is a network coverage containing attributed arcs, polygons, label points, location of volcanic vents, and structural data points. All polygons and arcs have been attributed, and are consistent with source information. Faults, stratigraphic contacts, and other linear features are represented as arcs. When a fault is also a stratigraphic, only a single arc is present. Dangling arcs representing faults exist but no dangled stratigraphic contacts exist.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None

Use_Constraints:
Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. This database was edited for a nominal scale of 1:50,000; higher resolution information is not present in the dataset. Plotting at scales larger than 1:50,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data.

Who distributes the data set? (Distributor 1 of 1)

US Geological Survey
345 Middlefiled Rd
Menlo Park, CA 94025
USA

1 (800) ASK A Geologist (voice)
What's the catalog number I need to order this data set?
Digital data available as downloadable files
What legal disclaimers am I supposed to read?

The United States Geology Survey (USGS) shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (i.e. GIF or JPG format files) are not legal documents and are not to be used as such. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistently within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. The USGS gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from USGS server (<https://dx.doi.org/10.3133/sim3318> ) and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems at the USGS, no warranty expressed or implied is made regarding the utility of the data on other systems for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.
How can I download or order the data?
- Availability in digital form:
  
  Data format: ARCG Size: 1.480
  
  Network links: <https://dx.doi.org/10.3133/sim3318>
- Cost to order the data: None
- Special instructions:
  
  down load from <https://dx.doi.org/10.3133/sim3318>

Data format:	ARCG Size: 1.480
Network links:	<https://dx.doi.org/10.3133/sim3318>

Who wrote the metadata?

Dates:

Last modified: 04-Mar-2014

Metadata author:

USGS
c/o Barry Moring
Geologist
345 Middlefield Rd, MS901
Menlo Park, CA 94025
USA

650.329.5360 (voice)
moring@usgs.gov

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

<http://www.esri.com/metadata/esriprof80.html>

Generated by mp version 2.9.6 on Mon Jan 26 10:13:05 2015