DOGAMI Geologic Map Series

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GMS-123, Geologic map of the Poison Creek and Burns 7.5' quadrangles, Harney County, Oregon, by Jason D. McClaughry, Carlie J. M. Duda, and Mark L. Ferns; 127 p. report; 2 map plates (34 x 48 inches, 34 x 46 inches), scale 1:24,000; Esri format geodatabase; shapefiles; metadata; spreadsheet (4 sheets).

Report Downloads:

 

INTRODUCTION [from the report]
The geology of the Poison Creek and Burns 7.5ʹ quadrangles was mapped by the Oregon Department of Geology and Mineral Industries (DOGAMI) during 2018 and 2019. This mapping is part of a multi-year geologic study of the Harney Basin, designated a high priority by the Oregon Geologic Mapping Advisory Committee (OGMAC;
Plate 1). Key objectives of this project are to 1) provide an updated and spatially accurate geologic framework for those quadrangles, referred to as the map area in the following report; 2) correlate lithologic units to surrounding areas; 3) improve the understanding of the structural and lithologic controls on groundwater aquifers; and 4) describe the occurrence of geologic resources (aggregate, industrial, mineral, and energy) and geologic hazards within the map area. This study was supported in part by a grant from the STATEMAP component of the National Cooperative Geologic Mapping Program (G18AC00136). Additional funds were provided by the State of Oregon.

The core products of this study are this report, an accompanying set of digital geologic maps and cross sections (Plates 1 and 2), and an Esri ArcGIS™ ArcMap™ geodatabase. The geodatabase presents the new geologic mapping in a digital format consistent with the Geologic Map Schema (GeMS), version 2.7 (USGS National Cooperative Geologic Mapping Program, 2018). This geodatabase contains spatial information, including geologic polygons, contacts, structures, geochemistry, geochronology, bedding, and water well data, as well as data about each geologic unit such as age, lithology, mineralogy, and structure. Digitization at scales of 1:8,000 or better was accomplished using a combination of 1-m lidar digital elevation models (DEMs) and 1-m 2016 National Agriculture Imagery Program (NAIP) digital orthophotos. Surficial and bedrock geologic units contained in the geodatabase are depicted on the map plates at a scale of 1:24,000. Both the geodatabase and digital geologic maps are supported by this report describing the geology in detail.

Collectively, this report, digital geologic maps, and cross sections refine our understanding of geologic conditions that control the distribution, quantity, and quality of groundwater resources, the distribution of terrain susceptible to landslides, the nature of seismic hazards, and the distribution of potential aggregate sources and other mineral resources in the Poison Creek and Burns 7.5 quadrangles. New detailed geologic data presented here also provide a basis for future geologic, geohydrologic, and geohazard studies in the greater Harney Basin.

 

GEOGRAPHIC INFORMATION SYSTEM (GIS) DATA
Geodatabase is Esri® version 10.2 format.
Metadata is embedded in the geodatabase and in the shapefiles and is also provided as separate .xml formatted files.

PCB2019_GeMS_v10.6.gdb (geodatabase only, with embedded metadata; 7.2 MB zip file)
Feature dataset classes
Name Description Metadata
bundle (zip)
Bedding This feature class represents point locations in the quadrangle where bedding measurements were made or were compiled from previous studies. These data are also contained in the bedding (strike and dip) spreadsheet. .xml
CartographicLines Vector lines that have no real-world physical existence and do not participate in map-unit topology. The feature class includes cross section lines used for cartography for the quadrangle. .xml
ContactsAndFaults The vector lines in this feature class contains geologic content including contacts and fault locations used to create the map unit polygon boundaries. The existence and location confidence values for the contacts and faults are provided in the feature class attribute table. .xml
DataSourcePolys This feature class contains polygons that delineate data sources for all parts of the geologic map. These sources may be a previously published map, new mapping, or mapping with a certain technique. For a map with one data source, for example all new mapping, this feature class contains one polygon that encompasses the map area. .xml
Geochemistry This feature class represents point locations where whole-rock samples have been analyzed by X-ray fluorescence (XRF) techniques in the quadrangle. Includes data collected by the authors during this study or compiled from previous studies. These data are also contained in the geochemistry spreadsheet. .xml
Geochronology This feature class represents point locations where 40Ar/39Ar isotopic ages have been obtained for rock samples in the quadrangle. Data collected by the authors during the course of this study. These data are also contained in the geochronology spreadsheet, .xml
GeochronPoints This feature class represents point locations where 40Ar/39Ar isotopic ages have been obtained for rock samples in the quadrangle. Complete analytical data are shown in the analysis-specific table Geochronology. .xml
GeologicLines These vector lines represent known fold axis locations in the quadrangle. The existence and location confidence for the fold axes are provided in the feature class attribute table. .xml
MapUnitPoints This feature class represents points used to generate the MapUnitPolys feature class from the ContactsAndFaults feature class. .xml
MapUnitPolys  This polygon feature class represents the geologic map units as defined by the authors. .xml
OrientationPoints This feature class represents point locations in the quadrangle where bedding measurements were made or were compiled from previous studies. These data are also contained in the bedding (strike and dip) spreadsheet. .xml
WaterWells This feature class represents point locations of water wells in the quadrangle. Includes data obtained by the authors from the Oregon Department of Water Resources (OWRD). These data are also contained in the WaterWells spreadsheet. .xml
Tables
DataSources Data table that contains information about data sources used to compile the geology of the area. .xml
DescriptionOfMapUnits Data table that captures the content of the Description of Map Units (DMU), or equivalent List of Map Units and associated pamphlet text, included in a geologic map. .xml
GeoMaterialDict Data table providing definitions and hierarchy for GeoMaterial names prescribed by the GeMS database schema. .xml
Glossary Data table that contains information about the definitions of terms used in the geodatabase. .xml
 

SHAPEFILES (GIS shapefiles only bundle, with metadata; 263 KB, zip file)

PCB2019_Bedding.shp
PCB2019_Geochemistry.shp
PCB2019_Geochronology.shp
PCB2019_RefMap.shp
PCB2019_WaterWells.shp
PCB2019_XSectionLines.shp
See descriptions above. .xml
.xml
.xml
.xml
.xml
.xml


MAP PLATES (georeferenced PDFs)

Plate 1. Geologic Map of the Poison Creek 7.5' Quadrangle, Harney County, Oregon, scale 1:24,000

Plate 2. Geologic Map of the Burns 7.5' Quadrangle, Harney County, Oregon, scale 1:24,000

Note: The map plate PDFs are in geospatial PDF format, allowing you to turn on and off layers in the map frame and to find geographic coordinates in the PDF if you have the free plugin for Adobe Reader. Learn more about the geospatial PDFs here.

GMS-123 map plate layers

 

image of Burns geologic quadrangle map