USGS Geoscience Data Catalog
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Yager, Douglas B. , and Bove, Dana J. , 2002, Generalized Geologic Map of the Upper Animas River Watershed and Vicinity, Silverton, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-2377, U.S. Geological Survey, Denver, Colorado.Online Links:
This is a Vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 65
Ordinates (y-coordinates) are specified to the nearest 65
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
(1,Tsp,60,rhyolite ash flow tuff,Miocene) (3,Qb,1,N.A.,Quaternary) (4,lake,21,N.A.,Quaternary) (7,Tcl,74,rhyolite ash flow tuff,Oligocene) (8,Ti,96,intrusions of unknown composition,Tertiary), (9,Qu,16,undifferentiated surficial deposits,Quaternary) (10,Qtg,17,talus,glacial till and rock glacier deposits,Quaternary) (11,Qal,6,unconsolidated fluvial deposits including alluvial fans, Quaternary) (12,Qcl,95,landslide and colluvium deposits,Quaternary) (19,Tir,118,rhyolite dikes and plugs,Miocene) (20,Tid,109,dacite intrusions,Oligocene to Miocene) (22,Tse,71,rhyolitic to dacitic ash flow tuff,Oligocene) (24,Ts,71,rhyolitic ash flow tuff,Oligocene) (25,Td,69,rhyolitic ash flow tuff,Oligocene) (27,Tb,68,rhyolitic ash flow tuff,Oligocene) (28,Tur,70,dacitic ash flow tuff,Oligocene) (29,Tig,25,monzonite to granodiorite stock,Oligocene) (30,Tsv,12,mostly intermediate comp. lava flows,volcaniclastics, Oligocene) (32,Tip,84,andesite to dacite ash flow tuff and breccia,Oligocene) (34,Tsj,24,mostly intermediate comp. volcaniclastics,lavas,Oligocene) (35,Tt,127,conglomerate and sandstone,Eocene) (36,Kg,113,granodiorite,Cretaceous) (37,Jm,65,sandstone and calcareous mudstone,Jurassic) (38,Je,58,sandstone,Jurassic) (39,Trd,49,siltst.,sandst., with limest.&congl. interbeds,Triassic) (40,Pc,36,shale,sandst.,&congl., locally calcareous,Permian) (41,Ph,23,sandst., with shale,sandst.,&congl.interbeds,Pennsylvanian) (42,Phm,30,shale, sandstone, and conglomerate,Pennsylvanian) (43,Pm,48,calcareous shale, sandstone, and conglomerate,Pennsylvanian) (44,Ml,36,limestone w. chert/shale interbeds (top),Mississippian) (45,Mdu,128,altered limestone,Mississippian) (45,Mdu?,128,altered limestone,Mississippian) (46,De,129,dol. limest., w. calc. shale & sandst. interbeds,Devonian) (48,Ci,52,quartzite,Cambrian) (49,pCu,121,schist,quartzite,and gneiss,Precambrian) (50,Do,93,dolomite and limestone,Devonian) (51,Jw,63,calc. mudst.&siltst., w. limest. sandst. interbeds,Jurassic) (52,Km,19,shale,Cretaceous) (53,Kd,20,sandst. w. siltst. & calc. shale interbeds,Cretaceous) (59,Tf,59,dacite ash flow tuff,Oligocene) (60,UM,2,Not mapped)The INFO file GEO.AAT contains the attribute field LINE_ID, which in all cases is equal to "1" and which represents a solid contact.
D.B. Yager compiled and digitized geology for the Ironton, Ophir, Howardsville, and Silverton quadrangles with contribution of a digital coverage provided by R.G. Luedke for the Silverton quadrangle. D.J. Bove compiled geology for the Handies Peak quadrangle.
303-236-2487 (voice)
dyager@usgs.gov
This map data was compiled for the purpose of comparing multiple Animas River Watershed Abandoned Mine Lands Project datasets such as geophysical, biologic, remote sensing, and geochemical datasets in a geologic context.
Burbank, W.S., and Luedke, R.G., 1964, Geology of the Ironton quadrangle, Colorado: scale 1:24,000: U.S. Geological Survey Geologic Quadrangle Map GQ-291, U.S. Geologial Survey, Denver, Colorado.
Steven, T.A., Lipman, P.W., Hail, W.J., Jr., Barker, Fred, and Luedke, R.G., 1974, Geologic map of the Durango quadrangle, southwestern Colorado: scale 1:250,000: U.S. Geological Survey Miscellaneous Investigations Series Map I-764, U.S. Geological Survey, Denver, Colorado.
Luedke, R.G., and Burbank, W.S., 1975, Preliminary geologic map of the Silverton quadrangle, Colorado: scale 1:20,000: U.S. Geological Survey Open-File Report Open-File Report 75-0433, U.S. Geological Survey, Denver, Colorado.
Luedke, R.G., and Burbank, W.S., 1975, Preliminary geologic map of the Howardsville quadrangle, Colorado: scale 1:20,000: U.S. Geological Survey Open-File Report Open-File Report 75-0432, U.S. Geological Survey, Denver, Colorado.
Lipman, P.W., 1976, Geologic map of the Lake City caldera area, western San Juan Mountains, southwestern Colorado: scale 1:48,000: U.S. Geological Survey Miscellaneous Investigations Series Map I-0962, U.S. Geological Survey, Denver, Colorado.
Luedke, R.G, and Burbank, W.S., 1987, Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale, and Ouray Counties, Colorado: scale 1:24,000: U.S. Geological Survey Geologic Quadrangle Map GQ-1595, U.S. Geological Survey, Denver, Colorado.
100 percent of formation attributes were compared to paper maps for accuracy when compiled and digitized. The authors included a revised interpretation of the geology of some of the volcanic units located in the western part of the map area, based on newly acquired isotopic dates (Bove and others, 1999). Thus, the percentage of San Juan Formation on our map is greater and differs from the percentage of this unit from other sources used for the compilation such as (Luedke, 1996). Field checks of every unit, fault, vein, or dike were not attempted due to the time constraints and focus and scope of the project. The user should note that the authors compiled data for the Howardsville quadrangle from one preliminary data source (Luedke, 1975b), thus the lack of detail in the western part of this quadrangle. A quantitative assessment of attribute accuracy was not attempted. Frequency tests were run on the arc and polygon labels to ensure that no features are unlabeled. The attributes have been checked by both the authors and the reviewers for agreement with published maps, unpublished field mapping, and preliminary drafted versions of the map.
The estimated horizontal positional accuracy of the data is 10 meters. All data used from published and unpublished digital sources are limited by the accuracy of that data. Attempts were made to verify the accuracy of these data by comparison to published topographic data and overlap with other digital data.
Completeness of the data is a function of source maps used, generalization of units, faults, and veins strategy developed by the authors during compilation, and field checking accomplished in the course of mapping altered bedrock regions. Some source data was not complete and "preliminary" such as in the western part of the Howardsville quadrangle.
Polygon and chain-node topology present. Each polygon is closed and has one label point. Polygon and chain-node topology present. Each polygon is closed and has one label point.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- The intended scale of use for this data is 1:48,000. Over 90 percent of the data were compiled at 1:24,000 scale. Data for granitic intrusions in the southwest part of the project area were compiled from 1:250,000-scale data sources. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data.
(303)236-5486 (voice)
webmaster@geology.cr.usgs.gov
The U.S. Geological Survey (USGS) provides these geographic data " as is". The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
Data format: | Geologic units and structural features in format ArcInfo Export (version 7.2.1) |
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Network links: |
<http://geology.cr.usgs.gov/pub/mf-maps/mf-2377/mf-2377.zip> <http://geology.cr.usgs.gov/pub/mf-maps/mf-2377/mf-2377.tar.gz> |
Data format: | Geologic units and structural features in format Shapefile (version 1.0) |
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Network links: |
<http://geology.cr.usgs.gov/pub/mf-maps/mf-2377/mf-2377.zip> <http://geology.cr.usgs.gov/pub/mf-maps/mf-2377/mf-2377.tar.gz> |
1-888-ASK-USGS (voice)
MF-2377 (Map-on-Demand)
none
Available as one printed sheet. Order from USGS at the address listed above or see <http://rmmcweb.cr.usgs.gov/pub/mod/order.html> for more ordering information.
For current prices please see <http://rmmcweb.cr.usgs.gov/public/mod/order.html>
(303) 236-2487 (voice)
dyager@usgs.gov