Identification_Information: Citation: Citation_Information: Originator: Florian Maldonado Originator: J.J. Anderson Originator: R. F. Biek Publication_Date: 2011 Title: Geologic Map of the Cottonwood Quadrangle, Iron County, Utah Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Open_File Report Issue_Identification: 1334 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Description: Abstract: The Cottonwood Mountain quadrangle is a structurally complex terrane composed of several features, from oldest to youngest: (1) low-angle faults, (2) megabreccia deposits, and (3) horsts and grabens. Low-angle faults are of two ages: an older age group referred to as the Red Hills low-angle shear zone, and younger faults related to later uplift mapped in the Parowan quadrangle. The Red Hills shear zone in the Red Hills, approximately 8 km west of quadrangle, is interpreted to be a low-angle Miocene structure that extends into the Markagunt Plateau and is of regional extent. This shear zone has detached part of the Brian Head Formation and overlying rocks from underlying rocks, possibly along the contact between the Brian Head Formation and the base of Tertiary volcanic rocks, or in some areas, within the upper part of the Brian Head Formation. On the geologic map, the shear zone is approximately placed at the contact between the Brian Head Formation and the base of Tertiary volcanic rocks even though it may occur below that contact. The shear zone is variously characterized by pulverized rock and discordance in bed attitudes and by thinning or omission of rock units overlying the shear zone. The structurally incompetent rocks of the Brian Head Formation allowed slip to be localized within this unit. The shear zone and overlying detached plate are offset by later high-angle faults and are preserved in the grabens and eroded from horsts. The age of the Red Hills low-angle fault is older than about 20 Ma since the dated northwest trending mafic dikes intrude both the lower and upper plate of the Red Hills shear zone. Other low-angle faults are found in the adjacent Parowan quadrangle to the southwest of map area but have not been found in the map area. These faults are younger than the Red Hills shear zone, possibly related to later uplift of the Markagunt Plateau or adjacent Red Hills. The faults merge locally with the Red Hills shear zone, and it is impossible to differentiate the two in some areas. Locally, the faults become steeper along part of their segment suggesting rotation of blocks containing these faults. Purpose: To map the geology of the quadrangle at 1:24,000 to be used to compile the Panquitch 1:100,000 scale sheet. Supplemental_Information: Compilation scale: 1:24,000 DATASETS INCLUDED IN THIS GEOSPATIAL DATABASE: Geology Feature Dataset: cottonwood_geo - geologic unit polygons cottonwood_geo_label - geologic unit labels cottonwood_line -contacts and faults cottonwood_dikes-dikes cottonwood_pnt-geologic point features--bedding, folds, joints, azimuth and dip of fault locations cottonwood_xsections Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 112.625 East_Bounding_Coordinate: 112.75 North_Bounding_Coordinate: 38.00 South_Bounding_Coordinate: 37.875 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: Low-angle and high angle faults Theme_Keyword: thrust faults Theme_Keyword: Red Hills shear zone Theme_Keyword: volcanic, intrusive Theme_Keyword: sedimentary rocks Theme_Keyword: Brian Head Formation Theme_Keyword: Markagunt megabreccia Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Utah Place_Keyword: Colorado Plateau Place_Keyword: Markagunt Plateau Place_Keyword: Iron Peak Place_Keyword: Basin and Range Place_Keyword: Paragonah Access_Constraints: none Use_Constraints: Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Florian Maldonado Contact_Address: Address_Type: mailing address Address: USGS, MS 980, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 303-236-1281 Contact_Facsimile_Telephone: 303-236-0214 Contact_Electronic_Mail_Address: fmaldona@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1334/OF2010-1334 _pdf Browse_Graphic_File_Description: Graphical representation of the map Browse_Graphic_File_Type: pdf Native_Data_Set_Environment: Microsoft Windows XP Version 5.1. ArcMap/ArcInfo version 9.2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered by GIS technician and authors and checked by the geologist that made the field observations. The attributes of this geospatial data set consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature and determine how each feature is symbolized. Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database. Automated routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. Check plots of the map were reviewed by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are complete: no features that could be accurately represented at the scale of 1:24,000 were eliminated. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Lines were mapped in the field and photo interpretation using 1:24,000 scale black and white aerial photographs. These lines were digitized from line compilation. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Anderson, J.J. Publication_Date: 1965 Title: Geology of northern Markagunt Plateau, Utah Series_Information: Series_Name: University of Texas (Ph.D. dissertation) Issue_Identification: p. 194 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1965 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Anderson (1965) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Anderson, J.J. Publication_Date: 1993 Title: The Markagunt Plateau megabreccia--Large Miocene gravity slide mantling the northern Markagunt Plateau, southwestern Utah Series_Information: Series_Name: Utah Geological Survey Miscellaneous Publication Issue_Identification: 93-2, p. 37 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Anderson (1993) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Bown, T.M. Originator: Hasiotis, S.T. Originator: Genise, J.F. Originator: Maldonado, F. Originator: Brouwers, E.M. Publication_Date: 1997 Title: Trace fossils of Hymenoptera and other insects, and Paleoenvironments of the Claron Formation (Paleocene and Eocene), southwestern Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Maldonado, F. Originator: Nealey, L.D. Publication_Date: 1995 Title: Geologic studies in the Basin and Range-Colorado Plateau Transition in southeastern Nevada, southwestern Utah, and northwestern Arizona Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 2153, p. 43-58 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bown and others (1997) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Eaton, J.G. Originator: Maldonado, F. Originator: McIntosh, W.C. Publication_Date: 1999 Title: New radiometric dates from Upper Cretaceous rocks of the Markagunt Plateau, southwestern Utah, and their bearing on subsidence histories Series_Information: Series_Name: Geological Society of America Abstracts with Program Issue_Identification: v. 31, p. A-11 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Eaton and others (1999) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Feist, Monique Originator: Eaton, J.F. Originator: Brouwers, E.M. Originator: Maldonado, F. Publication_Date: 1997 Title: Significance of Charophytes from the lower Tertiary variegated and volcaniclastic units, Brian Head Formation, Casto Canyon area, southern Sevier Plateau, southwestern Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Nealey, L.D. Publication_Date: 1995 Title: Geologic studies in the Basin and Range-Colorado Plateau Transition in southeastern Nevada, southwestern Utah, and northwestern Arizona Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 2153, p. 29-37 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Feist and others (1997) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Fleck, R.J. Originator: Anderson, J.J. Originator: Rowley, P.D. Publication_Date: 1975 Title: Chronology of mid-Tertiary volcanism in High Plateaus region of Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Anderson, J.J. Originator: Rowley, P.D Originator: Fleck, R.J. Originator: Nairn, A.E.M. Publication_Date: 1975 Title: Cenozoic geology of southwestern High Plateaus of Utah Series_Information: Series_Name: Geological Society of America Special Paper Issue_Identification: 160, p. 53-61 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1975 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Fleck and others (1975) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Goldstrand, P.M. Originator: Mullet, D.J. Publication_Date: 1997 Title: The Paleocene Grand Castle Formation-A new formation on the Markagunt Plateau of southwestern Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Maldonado, F. Originator: Nealey, L.D. Publication_Date: 1997 Title: Geologic studies in the Basin and Range-Colorado Plateau Transition in southeastern Nevada, southwestern Utah, and northwestern Arizona Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 2153, p. 61-77 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Goldstrand and Mullet (1997) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Judy, J.R. Publication_Date: 1974 Title: Cenozoic stratigraphic and structural evolution of the west-central Markagunt Plateau, Utah Series_Information: Series_Name: Kent State University M.S. thesis (p. 107) Issue_Identification: unpublished Publication_Information: Publication_Place: Kent, Ohio Publisher: Kent State University Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1974 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Judy (1974) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Hilton, D.A. Publication_Date: 1984 Title: The petrology, sedimentology, and stratigraphy of the Late Cretaceous(?) and early Tertiary sedimentary rocks of southwest Markagunt Plateau, Utah Series_Information: Series_Name: Kent State University M.S. thesis-(p. 79) Issue_Identification: unpublished Publication_Information: Publication_Place: Kent, Ohio Publisher: Kent State University Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hilton (1984) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Publication_Date: 1995 Title: Decoupling of mid-Tertiary rocks, Red Hills-western Markagunt Plateau, southwestern Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Scott, R.B Originator: Swadley, W.C. Publication_Date: 1995 Title: Geologic studies in the Basin and Range to Colorado Plateau transition of southwestern Nevada, southwestern Utah, and northwestern Arizona Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 2056, p. 223-254 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado (1995) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Sable, E.G. Originator: Anderson, J.J. Publication_Date: 1989 Title: Evidence for shallow detachment faulting of mid-Tertiary rocks, Red Hills (Basin and Range), with implications for a more extensive detachment zone in the adjacent Markagunt Plateau (Colorado Plateau), southwest Utah Series_Information: Series_Name: Eos Issue_Identification: v. 70. no. 43, p. 1336 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1989 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and others (1989) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Sable, E.G. Originator: Anderson, J.J. Publication_Date: 1992 Title: Evidence for a Tertiary low-angle shear zone, Red Hills, Utah, with implications for a regional shear zone in the adjacent Colorado Plateau Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Maldonado, F. Originator: Sable, E.G. Originator: Anderson, J.J. Publication_Date: 1992 Title: Engineering and Environmental Geology of southwestern Utah Series_Information: Series_Name: Utah Geological Association Publication Issue_Identification: Pub. 21, 1992 Field Symposium, p. 315-323 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1992 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado (1992) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Sable, E.G. Originator: Anderson, R.E. Publication_Date: 1992 Title: Tertiary thrust (?) faults, Parowan-Summit area, Markagunt Plateau, southwestern Utah Series_Information: Series_Name: Eos Issue_Identification: v. 71, n. 43, p. 574-575 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1992 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and others (1992) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Sable, E.G. Originator: Nealey, L.D. Publication_Date: 1997 Title: Cenozoic low-angle faults, thrust faults, and anastomosing high-angle faults, western Markagunt Plateau, southwestern Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Nealey, L.D. Publication_Date: 1995 Title: Geologic studies in the Basin and Range-Colorado Plateau Transition in southeastern Nevada, southwestern Utah, and northwestern Arizona Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 2153, p. 129-149. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and others (1997) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Williams, V.S. Publication_Date: 1993 Title: Geologic map of the Parowan Gap quadrangle, Iron County, Utah Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1712 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and Williams (1993) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Williams, V.S. Publication_Date: 1993 Title: Geologic map of the Paragonah quadrangle, Iron County, Utah Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1713 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and Williams (1993) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Moore, R.C. Publication_Date: 1995 Title: Geologic map of the Parowan quadrangle, Iron County, Utah Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Map Issue_Identification: GQ-1762 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Maldonado and Moore (1995) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Moore, R.C. Publication_Date: 1982 Title: The geology of a portion of the west-central Markagunt Plateau, southwestern Utah Series_Information: Series_Name: Kent State University, M.S. thesis (p. 72) Issue_Identification: unpublished Publication_Information: Publication_Place: Kent, Ohio Publisher: Kent State University Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Moore (1982) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Mullett, D.J. Publication_Date: 1989 Title: Interpreting the early Tertiary Claron Formation of southern Utah Series_Information: Series_Name: Geological Society of America Abstracts with Programs Issue_Identification: v. 2, n. 5, p. 120 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1989 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Mullett (1989) Source_Contribution: geologic features Source_Information: Source_Citation: Citation_Information: Originator: Sable, E.G. Originator: Maldonado, Florian Publication_Date: 1997 Title: The Brian Head Formation (revised) and selected Tertiary sedimentary rock units, Markagunt Plateau and adjacent areas, southwestern Utah Series_Information: Series_Name: see larger work citation Issue_Identification: see larger work citation Larger_Work_Citation: Citation_Information: Originator: Maldonado, Florian Originator: Nealey, L.D. Publication_Date: 1997 Title: Geologic studies in the Basin and Range-Colorado Plateau Transition in southeastern Nevada, southwestern Utah, and northwestern Arizona Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 2153, p. 7-26 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Sable and Maldonado (1997) Source_Contribution: geologic features Process_Step: Process_Description: The map data were originally digitized in GSM CAD and saved as shapefiles. The original shapefiles were imported into ARCGIS 9.2.0, converted to feature classes, and stored in a file geodatabase. Polygon topology was built and text map descriptors were added to each feature class. Process_Date: 2009 Process_Step: Process_Description: Draft check plots of the geologic map and explanation were created and submitted for peer review. Geologists reviewed the plots for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Revisions were made to the geospatial database as needed. Process_Date: 2009 Process_Step: Process_Description: First draft of metadata created by Lyndsay A. Hazen using FGDC ESRI in the ArcCatalog Sofware. Process_Date: 2009 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 12N Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -111.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0001 Ordinate_Resolution: 0.0001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: DATASETS: Geology Feature Dataset: cottonwood_geo cottonwood_pnt cottonwood_line cottonwood_dikes cottonwood_xsections cottonwood_geo Descripton of Items: UNIT -Short geologic unit name SYMBOL- geologic unit color number (wpgcmykg.style) DESCRIPTION- Short geologic unit explanation and age UNIT DESCRIPTION Kis Iron Springs Formation (Upper Cretaceous) Qac Alluvium and colluvium, undivided (Holocene) Qaco Older alluvium and colluvium, undivided (Holocene) Qafo Older fan alluvium (Holocene to late Pleistocene) Qafy Younger fan alluvium (Holocene to late Pleistocene) Qc Colluium (Holocene) Qco Older colluvium (Holocene) Qf Fan alluvium (late Pleistocene) Qfa Active fan alluvium (Holocene) Qms Landslide debris (late Pleistocene) Qms? Landslide debris (late Pleistocene) Qp Playa lake deposit (Holocene) Qsa Stream channel alluvium (Holocene) Tbh Brian Head Formation (Oligocene and middle Eocene) Tbh? Brian Head Formation (Oligocene and middle Eocene) Tbv Bear Valley Formation (Oligocene) Tbvb Intercalated mudflow breccia of Bear Valley Formation (Oligocene) Tbvt Intercalated tuff Bear Valley Formation (Oligocene) Tcr Red unit of the Claron Formation (Eocene and Paleocene) Tcrw White subunit of the Red unit of the Claron formation (Eocene and Paleocene) Td Mount Dutton Formation (Miocene and Oligocene) Td? Mount Dutton Formation (Miocene and Oligocene) Tdd Northeast-trending dikes of Mount Dutton Formation (Miocene and Oligocene) Tgc Grand Castle Formation (Paleocene) Tib Baldhills Tuff Member of Isom Formation (Oligocene) Tibm Blue Meadows Tuff Member of Isom Formation (Oligocene) Tip Iron Peak intrusion (Miocene) Tipd Feeder dikes of Iron Peak intrusion (Miocene) Tm Megabreccia undifferentiated (Miocene) Tnd Northeast trending mafic dikes (Miocene) Tnw Wah Wah Springs Formation of Needles Range Group (Oligocene) Tv Volcanic rocks of the Red Hills upper plate, undifferentiated (Oligocene) cottonwood_lines DESCRIPTION-Short explanation of feature using digital cartographic standard DESCRIPTION Red Hills low-angle shear zone-certain Red Hills low-angle shear zone-concealed boundary of megabreccia deposit contact-certain map boundary normal fault-certain normal fault-certain, displacement unknown normal fault-concealed normal fault-concealed, displacement unknown normal fault-concealed, queried normal fault-inferred normal fault-inferred, displacement unknown oblique-slip normal fault-certain, left lateral offset oblique-slip normal fault-certain, right lateral offset oblique-slip normal fault-certain, right lateral offset, queried oblique-slip normal fault-concealed, left lateral offset oblique-slip normal fault-concealed, right lateral offset cottonwood_pnts DESCRIPTION-Short explanation of feature using digital cartographic standard AZIMUTH-Compass direction of fault plane trend, in degrees (0-359) DIP-Angle of fault plane inclination, in degrees from horitonzal (0-90) DESCRIPTION inclined bedding-showing dip inclined bedding-showing strike and dip inclined fault-showing dip value and direction inclined foliation-showing strike and dip inclined joint-showing strike and dip, in Tip unit mafic dike vents in Tip unit cottonwood_dikes DESCRIPTION-Short explanation of feature using digital cartographic standard DESCRIPTION UNIT DESCRIPTION Tdd dike-certain Tmd dike-certain Tnd dike-certain Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/2010/1334 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25286 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: none Resource_Description: Open-File Report 2010-1334 Distribution_Liability: This database, identified as OF2010-1334, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty, expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Although this information product, for the most part, is in the public domain, it also contains copyrighted material as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. Standard_Order_Process: Non-digital_Form: Available as one printed sheet. Order from USGS at the address listed above or see for more ordering information. Fees: For current prices of USGS information products, please see Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25286 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 1-(888)-ASK-USGS Contact_Electronic_Mail_Address: http://ask.usgs.gov Resource_Description: Open-File Report 2010-1334 Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/2010/1334 Distribution_Liability: This database, identified as OF2010-1334, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty, expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Although this information product, for the most part, is in the public domain, it also contains copyrighted material as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Geodatabase, Shapefile Format_Version_Number: 9.2 File_Decompression_Technique: ZIP archive (Windows) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1334 Fees: None Metadata_Reference_Information: Metadata_Date: 20090506 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Paco VanSistine Contact_Address: Address_Type: mailing address Address: Denver Federal Center Address: MS 980, Box 25046 DFC City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5452 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none