Identification_Information: Citation: Citation_Information: Originator: Karl S. Kellogg Originator: Keenan Lee Originator: Wayne R. Premo Originator: Michael A. Cosca Publication_Date: 2013 Title: Geologic Map of the Harvard Lakes 7.5 minute Quadrangle, Chaffee County, Colorado Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigations Map Issue_Identification: SIM 3267 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/sim3267 Description: Abstract: The Harvard Lakes 1:24,000-scale quadrangle spans the Arkansas River Valley in central Colorado, with the foothills of the Sawatch Range on the west and Mosquito Range on the east. The valley lies in the northern end of the Rio Grande rift, and is structurally controlled, by Oligocene and younger normal faults mostly along the west side of the valley. Five separate pediment surfaces were mapped, and distinctions were made between terraces formed by the Arkansas River and surfaces that formed from erosion and alluviation that emanated from the Sawatch Range. Four flood deposits containing boulders as long as 15 m were deposited from glacial breakouts just north of the quadrangle. Miocene and Pliocene basin-fill deposits of the Dry Union Formation are exposed beneath terrace or pediment deposits at several places. The southwestern part of the late Eocene Buffalo Peaks volcanic assemblage, mostly andesitic breccias and flows and ash-flow tuffs, occupy the northeastern corner of the map. Dated Tertiary intrusive rocks include Late Cretaceous or early Paleocene hornblende gabbro and hornblende monzonite. Numerous rhyolite and dacite dikes of inferred early Tertiary or Late Cretaceous age also intrude the basement rocks. Basement rocks are predominantly Mesoproterozoic granites and subordinately paleoproterozoic biotite gneiss and granitic gneiss. Purpose: To provide geologic information (including rock descriptions, geologic structures, surficial deposits, and geologic hazards) for an important area studied during completion of the Upper Arkansas River Valley task of the Rio Grande Basins project. Supplemental_Information: Compilation scale: 1:24,000 DATASETS INCLUDED IN THIS GEOSPATIAL DATABASE: Geology Feature Dataset: HarvardLakes_geo - geologic units with symbols, names, and ages corresponding to the description of map units in the accompanying pamphlet HarvardLakes_lines - contacts and faults HarvardLakes_channels - channel features HarvardLakes_dikes - dike features HarvardLakes_shears - generalized shear zones HarvardLakes_landslides - landslide scarps HarvardLakes_pnts - geologic point features HarvardLakes_samples - age sample locations HarvardLakes_labels - point layer with geologic unit symbols, names, and ages Raster Data: HarvardLakes_topo - USGS 1:24000 topographic digital base map HarvardLakes_shd - shaded relief Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2012 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.25 East_Bounding_Coordinate: -106.125 North_Bounding_Coordinate: 39.0 South_Bounding_Coordinate: 38.875 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: geology Theme_Keyword: geologic map Theme_Keyword: surficial geology Theme_Keyword: glacial geology Theme_Keyword: Mesoproterozoic rocks Theme_Keyword: Paleoproterozoic rocks Theme_Keyword: Tertiary intrusive rocks Theme_Keyword: Buffalo Peak volcanics Theme_Keyword: Dry Union Formation Theme_Keyword: terraces Theme_Keyword: Bull Lake glaciation Theme_Keyword: Pinedale glaciation Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Harvard Lakes Place_Keyword: Arkansas River Place_Keyword: Arkansas River Valley Place_Keyword: Sawatch Range Place_Keyword: Mosquito Range Place_Keyword: Buena Vista Place_Keyword: Colorado Place_Keyword: Chaffee County Place_Keyword: Buffalo Peaks Wilderness Place_Keyword: San Isabel National Forest Place_Keyword: United States Place_Keyword: USA 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: Karl S. Kellogg Contact_Organization: U.S. Geological Survey Contact_Position: Research Geologist 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: 303-236-1305 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: kkellogg@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/SIM/3267 Browse_Graphic_File_Description: Graphical representation of the map Browse_Graphic_File_Type: PDF Data_Set_Credit: Digital base map and shaded relief prepared by Theodore R. Brandt Native_Data_Set_Environment: Microsoft Windows XP Professional Version 2002 Service Pack 3 - ArcCatalog Version 10.0 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attributes were entered digitally and checked by GIS technician. Authors and USGS map editors performed separate reviews. 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 compilation scale were eliminated or generalized. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Contacts of surficial units were mapped using aerial photos, field observations, and LiDAR imagery. Most digitized positions on the map are estimated to have about 10 meters horizontal accuracy. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Brock, M.R. Originator: Barker, F. Title: Geologic Map of the Mount Harvard quadrangle, Chaffee and Gunnison Counties Publication_Date: 1972 Series_Information: Series_Name: U.S. Geological Survey Geologic Quadrangle Series Map Issue_Identification: GQ-952 Source_Scale_Denominator: 62500 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1972 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Brock and Barker (1972) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Fridrich, C.J. Originator: DeWitt, E. Originator: Bryant, B. Originator: Richard, S. Originator: Smith, R.P. Title: Geologic map of the Collegiate Peaks Wilderness area and the Grizzly Peak caldera, Sawatch Range, Colorado Publication_Date: 1998 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-2565 Source_Scale_Denominator: 50000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Fridrich and others (1998) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Hedlund, D.C. Title: Geologic map of the Buffalo Peaks Wilderness Study Area, Lake, Park, and Chafee Counties, Colorado Publication_Date: 1985 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-1628C Source_Scale_Denominator: 50000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1985 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hedlund (1985) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Kellogg, K.S. Originator: Shroba, R.R. Originator: Premo, W.R. Originator: Bryant, B. Title: Geologic map of the eastern half of the Vail 30' x 60' quadrangle, Eagle, Summit, and Grand Counties, Colorado Publication_Date: 2011 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: 100000 Source_Scale_Denominator: 100000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Kellogg and others (2011) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Keller, J.W. Originator: McCalpin, J.P. Originator: Lowry, B.W. Title: Geologic map of the Buena Vista East quadrangle, Chaffee County, Colorado Publication_Date: 2004 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 04-4 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Keller and others (2004) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Lee, Keenan Title: Catastrophic glacial outburst floods on the Arkansas River, Colorado Publication_Date: 2010 Series_Information: Series_Name: The Mountain Geologist Issue_Identification: v. 47, no. 2 Other_Citation_Details: p. 35-57 Type_of_Source_Media: journal Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Lee (2010) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: McCalpin, J.P. Originator: Shannon, J.R. Title: Geologic map of the Buena Vista West quadrangle, Chaffee County, Colorado Publication_Date: 2005 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 05-8 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: McCalpin and Shannon (2005) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Sanders, G.F., Jr. Title: Geology of the Buffalo Peaks, Park and Chaffee Counties Colorado Publication_Date: 1975 Series_Information: Series_Name: Colorado School of Mines thesis Issue_Identification: T-1731 Other_Citation_Details: 62 p., 2 plates 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: Sanders (1975) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Scott, G.R. Title: Reconnaissance geologic map of the Buena Vista quadrangle, Chaffee and Park Counties, Colorado Publication_Date: 1975 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-657 Source_Scale_Denominator: 62500 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: Scott (1975) Source_Contribution: geologic compilation Source_Information: Source_Citation: Citation_Information: Originator: Widmann, B.L. Originator: Kirkham, R.M. Originator: Houck, K.J. Originator: Lindsay, N.R. Title: Geologic map of the Jones Hill quadrangle, Park County, Colorado Publication_Date: 2011 Series_Information: Series_Name: Colorado Geological Survey Open-File Report Issue_Identification: 07-5 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Widmann and others (2011) Source_Contribution: geologic compilation Process_Step: Process_Description: Compilation and evaluation of previous mapping. Initiation of field mapping. Process_Date: 2008 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: 2012 Process_Step: Process_Description: Initial linework digitized in Mapublisher. Shapefiles were converted to a geodatabase and edited in ArcGIS 10. Process_Date: 2012 Process_Step: Process_Description: Metadata created by Kristine L. Zellman. Process_Date: 2012 Process_Step: Process_Description: The database files, metadata, and check plots were edited by the USGS Enterprise Publishing Network, and revisions made to the geospatial database as needed. Process_Date: 2012 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 13 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -105.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 20 meters Ordinate_Resolution: 20 meters 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: HarvardLakes_geo: geologic unit polygons HarvardLakes_lines: contacts and faults HarvardLakes_pnts: bedding attitude information HarvardLakes_channels: channels HarvardLakes_dikes: dikes HarvardLakes_shears: generalized shear zones HarvardLakes_samples: age sample locations HarvardLakes_landslides: landslide scarps HarvardLakes_labels: point feature containing geologic unit information HARVARDLAKES_GEO Explanation of fields: UNIT-Short geologic unit name DESCRIPTION- Short geologic unit explanation AGE-Age of geologic unit Unique feature attributes: Unit Description Age Cds Dotsero Formation and Sawatch Quartzite, undivided upper Cambrian Khbg Hornblende-biotite gabbro or diorite late Cretaceous Nd Dry Union Formation Pliocene and Miocene OCm Manitou Formation lower Ordovician and upper Cambrian Peai Intrusive andesite late Eocene Peba Cap andesite upper Eocene Pebal Lower andesite flow upper Eocene Pebb Basal andesite flow breccia upper Eocene Pebn Basaltic andesite late Eocene Pebt Tuff of Buffalo Peaks upper Eocene PeKdc Rhyodacite and dacite dike middle Eocene to late Cretaceous? PeKm Hornblende monzonite early Paleocene or late Cretaceous Qa Stream-channel and overbank alluvium Holocene Qaa Lava Creek B ash and fluvial sediments middle Pleistocene Qac Alluvium and colluvium, undivided Holocene to middle? Pleistocene Qao Old alluvial gravel of Arkansas River middle Pleistocene Qc Colluvium Holocene to middle? Pleistocene Qd Diamicton late to early Pleistocene Qdf Debris-flow deposit Holocene to middle? Pleistocene Qf Fan deposit Holocene to middle Pleistocene Qfa High-level flood gravel of older Pinedale glaciation late Pleistocene Qfo Old fan deposit late to middle? Pleistocene Qg2 Very old piedmont-slope deposit middle to early Pleistocene Qg3 Old piedmont-slope deposit middle Pleistocene Qgb Piedmont-slope deposit of Bull Lake glaciation late and middle? Pleistocene Ql Landslide deposit Holocene to middle? Pleistocene Qn Nussbaum(?) alluvium of Scott (1975) early Pleistocene Qpa Pond alluvium Holocene and late Pleistocene Qpg Periglacial deposit Holocene to early? Pleistocene Qpl Lacustrine deposit late Pleistocene Qpo Younger Pinedale-age flood deposit late Pleistocene Qpoc Channel deposit in younger Pinedale-age outwash deposit late Pleistocene Qpoo Older Pinedale-age flood deposit late Pleistocene Qpooc Channel deposits in older Pinedale-age outwash deposit late Pleistocene Qt Talus deposit Holocene to middle Pleistocene Qtb Till of Bull Lake glaciation, undivided late and middle Pleistocene Qtbo Older till of Bull Lake glaciation late or middle Pleistocene Qtby Younger till of Bull Lake glaciation late and middle? Pleistocene Qtp Till of Pinedale glaciation, undivided late Pleistocene Qtpb Till of pre-Bull Lake glaciation middle or early Pleistocene Qtpo Older till of Pinedale glaciation late Pleistocene Qtpy Younger till of Pinedale glaciation late Pleistocene water water body Xb Biotite gneiss Paleoproterozoic Xdi Diorite Paleoproterozoic Xgd Foliated granodiorite Paleoproterozoic? Xhg Hornblende-biotite gneiss Paleoproterozoic Yge Granite of Elephant Rock Mesoproterozoic Ygef Augen gneiss facies of granite of Elephant Rock Mesoproterozoic Ygl Granite of Langhof Gulch Mesoproterozoic Yhy Intermixed granite of Langhof Gulch and granite of Elephant Rock Mesoproterozoic Yqd Quartz diorite Mesoproterozoic YXhm Hornblende monzodiorite Meso- or Paleoproterozoic HARVARDLAKES_LINES Explanation of fields: DESCRIPTION- Cartographic description of line feature Unique feature attributes: DESCRIPTION contact-approximately located contact-certain contact-concealed fault-air photo (NAIP) identified fault-approximately located fault-certain fault-concealed fault-inferred map boundary normal fault-approximately located normal fault-certain normal fault-concealed normal fault-LiDAR identified shoreline HARVARDLAKES_PNTS Explanation of fields: AZIMUTH- Azimuth of bedding strike (in degrees) DIP- Angle of bedding (in degrees from horizontal) DESCRIPTION- Cartographic description of point feature Unique feature attributes: DESCRIPTION inclined bedding-showing strike and dip inclined foliation-showing strike and dip vertical foliation-showing strike lineation-showing bearing and plunge HARVARDLAKES_CHANNELS Explanation of fields: DESCRIPTION- description of channel feature Unique feature attributes: DESCRIPTION Channel in Qpo Channel in Qpo-covered or eroded Channel in Qpoo Channel in Qpoo-covered or eroded HARVARDLAKES_DIKES Explanation of fields: DESCRIPTION- description of dike feature AGE- Age of dike UNIT-rock unit name Unique feature attributes: Unit Age Description PeKdc middle Eocene to Late Cretaceous? Rhyodacite and dacite dike PeKm early Paleocene or Late Cretaceous Hornblende monzonite dike PeKr early Paleocene or Late Cretaceous Rhyolite and quartz latite dike (Scott) PeKrq early Paleocene or Late Cretaceous Quartz rhyolite porphyry dike HARVARDLAKES_LANDSLIDES Explanation of fields: DESCRIPTION- Description of landslide feature Unique feature attributes: DESCRIPTION landslide scarp HARVARDLAKES_SAMPLES Explanation of fields: SAMPLE_NUM-Name of Sample VALUE-Sample age TYPE-Type of age dating used Unique feature attributes: Sample_Num Value Type HL09-121 1438+-7 Ma U-Pb zircon age HL09-136 67.9+-0.9 Ma 40Ar-39Ar age HL09-170 37.9+-0.3 Ma 40Ar-39Ar age HL09-44 65.3+-0.5 Ma 40Ar-39Ar age HL09-53 1445+-7 Ma U-Pb zircon age HL09-89 65.0+-0.5 Ma 40Ar-39Ar age HARVARDLAKES_LABELS Explanation of fields: UNIT-Short geologic unit name DESCRIPTION- Short geologic unit explanation AGE-Age of geologic unit *same as HARVARDLAKES_GEO Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS, Information Services Box 25286 City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: usgsstore@usgs.gov Resource_Description: Scientific Investigations Map-3267 Distribution_Liability: Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. This database 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 any 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GEODATABASE, SHAPEFILE Format_Version_Number: 10.0 File_Decompression_Technique: ZIP Archive Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.3133/sim3267 Fees: For current charges please see website http://store.usgs.gov/public/mod/order.html or download data at no cost. Metadata_Reference_Information: Metadata_Date: 2012 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kristine L. Zellman Contact_Address: Address_Type: mailing address Address: Denver Federal Center Address: MailStop 980 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5838 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: kzellman@usgs.gov 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