Metadata: Redwood County, Minnesota - Aggregate Resources Geologic Field Observations

Redwood County, Minnesota - Aggregate Resources Geologic Field Observations

This page last updated: 10/02/2022
Metadata created using Minnesota Geographic Metadata Guidelines


Go to Section:
  1. Overview
  2. Data Quality
  3. Data Organization
  4. Coordinate System
  5. Attributes
  6. Distribution - Get Data
  7. Metadata Reference

Section 1: Overview

Originator:Minnesota Department of Natural Resources, Division of Lands and Minerals, Mineral Potential Evaluation Section

Title: Redwood County, Minnesota - Aggregate Resources Geologic Field Observations

Abstract: This dataset includes information gathered in the field. Fieldwork was completed in the summer and fall of 2021. It includes 109 field observation sites within Redwood County, Minnesota. Observations include, but are not limited to gravel pits, exposures of surficial geologic sediment, and glacial stratigraphy in road cuts or along stream banks, excavations for construction projects and trenches (cable, pipe, and tiling), and test holes drilled with a Giddings Soil probe. This spatial dataset contains a field description of each site, the dominant type of material encountered, the source of information, geologic unit thickness, and geologic overburden thickness.

Purpose: To summarize the field observations collected in Redwood County, Minnesota. These field observations were made to confirm air photo interpretation that identified potential aggregate bearing landforms.

Time Period of Content Date: 10/02/2022

Currentness Reference: Data were collected intermittently in the summer and fall of 2021.

Progress: Complete

Maintenance and Update Frequency: None Planned

Spatial Extent of Data: Redwood County, Minnesota

Bounding Coordinates: -94.86
-95.62
44.71
44.19

Place Keywords:

Theme Keywords:

Theme Keyword Thesaurus: Field observations, aggregate resources, surficial geology.

Access Constraints:

Use Constraints: Acknowledgement of the Minnesota Department of Natural Resources is appreciated for products derived from these data.

Contact Person Information: ,


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Phone:
Email:

Browse Graphic: None available

Associated Data Sets:

Section 2: Data Quality

Attribute Accuracy:

Logical Consistency:

Completeness: The data points were gathered at the location where field observations took place. Additional information is given in the Lineage section.

Horizontal Positional Accuracy: The differential correction of the GPS unit for GPS located sites is +/- 2 meters

Vertical Positional Accuracy: Not applicable.

Lineage: A tablet, a GPS unit (Garmin inReach SE+), ArcGIS 10.6 software, and the GPS toolbar in ArcGIS 10.6 were used in the field to determine the track and location of the observer collecting the points. Field observation points were digitized in real time, as well as, the entered tabular attribute information. The combination of the GPS unit's location, USGS topographic maps (1:24,000), and aerial photographs (1:3,000 - 1:12,000) were used to assist in determining the observation's site location on screen. The GPS unit (with differential correction) is accurate to approximately a few meters.

Section 3: Spatial Data Organization (not used in this metadata)


Section 4: Coordinate System

Horizontal Coordinate Scheme: Universal Transverse Mercator

UTM Zone Number: 15

Horizontal Datum: NAD83

Horizontal Units: meters

Vertical Datum:

Vertical Units:

Depth Datum:

Depth Units:

Section 5: Attributes

Overview: This dataset consists of field observation unique id, type of site, type of geologic material, description of the observation, unit thickness, and overburden thickness.

Detailed Citation:

Table Detail:
fobs_redwood
Field NameValid ValuesDefinitionDefinition Source
FID
-
Internal feature number.Esri
Shape
-
Feature geometry.Esri
field_id
-
sitetype_1enumerated
Drill holeTest hole drilled with a Giddings Soil probe.
ExcavationUsually due to human activity, such as digging of building, trenches, construction areas, or containment ponds.
ExposureOutcrop of material from erosional, biological processes, or construction processes.
Gravel PitGravel pits exposing sand and gravel material.
OtherGeneral miscellaneous field observations.
OutcropBedrock exposure at the surface.
sitetype_2enumerated
Animal HoleA hole dug by an animal that exposes sediment.
Back HoeA hole or exposure of sediment created by a back hoe.
ConstructionMining or digging due to construction activity associated with building of houses, excavating, or roads.
DitchMaterials exposed in a ditch due to a slump or landscaping that has removed vegetation.
DrainageMaterials exposed in a drainage ditch due to a slump or landscaping that has removed vegetation.
Drill HoleTest hole drilled with a Giddings Soil probe.
FieldMaterials exposed in a field.
Power PoleA hole or materials exposed from the installation of a power pole.
HillsideMaterials exposed in a hillside.
OutcropBedrock exposed at the surface.
Road CutMaterials exposed in a road cut.
material_1enumerated
Refers to rocks with a diameter >10 inches.
ClayVery fine-grained sediment that is less than 0.004 mm in size.
Did Not ObserveIndicates that observations were not possible, likely due to vegetation cover.
Fine SandRocks and minerals that range in diameter of 0.0625 to 0.25 mm.
SandSand is composed of rocks and minerals that range in diameter from 0.0625 to 2 mm.
Sand minor GravelSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 5-15% by volume.
Sand with GravelSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 15-35% by volume.
Sand and GravelSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 35-50% by volume.
Gravel and SandSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 50-65% by volume.
Silty Sand and Gravel
Silty SandSand that contains some silt.
Gravel with SandSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 65-85% by volume.
Silt
Rocky SoilSoil that contains a high percentage of rock fragments
CobblesRock fragments that have a diameter between 3-10 inches.
TopsoilSoil that contains organic matter.
material_2enumerated
BouldersRefers to rocks with a diameter >10 inches.
ClayVery fine-grained sediment that is less than 0.004 mm in size.
CobblesRocks with a diameter between 3-10 inches.
Fine SandRocks and minerals that range in diameter of 0.0625 to 0.25 mm.
SandSand is composed of rocks and minerals that range in diameter from 0.0625 to 2 mm.
Sand minor GravelSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 5-15% by volume.
Sand with GravelSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 15-35% by volume.
Sand and GravelSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 35-50% by volume.
Gravel and SandSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 50-65% by volume.
Silty Sand and Gravel
TopsoilSoil that contains organic matter.
Silt
Gravel with SandSediment that contains a mixture of rocks in varying sizes ranging from 0.0625 to 64 mm. This description is given to sediment that contains an approximate estimate of gravel between 65-85% by volume.
Silty SandSand that contains some silt.
Sandy TillTill that contains a high percentage of sand.
fielddesc
-
A short field description of the observation site.
thickness
-
The thickness of the deposit expressed in combination with a modifier. Not Available (NA) indicates that the measurement does not apply or was not observed.
thick_val
-
Gives the minimum value for thickness. (-999 is a null value)
overburden
-
Expresses overburden thickness by possibly using one or both the modifier and value. Not Available (NA) indicates that the measurement does not apply or was not observed.
ob_mod
-
Modifiers to express numeric approximations observed for deposit thickness: > greater than; < less than
ob_val
-
Gives the value for overburden thickness. (-999 is a null value).

Section 6: Distribution

Publisher: Minnesota Department of Natural Resources (DNR)

Publication Date: 10/02/2022

Contact Person Information: ,


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Phone:
Email:

Distributor's Data Set Identifier: Redwood County Aggregate Resources, Sand and Gravel Potential

Distribution Liability: The State of Minnesota makes no representations or warranties express or implied, with respect to the use of the information contained herein regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, completeness, usefulness, or reliability of this information for any purpose. The user accepts the information “as is." The State of Minnesota assumes no responsibility for loss or damage incurred as a result of any user’s reliance on this information. All maps, reports, data, and other information contained herein are protected by copyright. Permission is granted to copy and use the materials herein for any lawful noncommercial purpose. Any user of this information agrees not to transmit or provide access to all or any part of this information to another party unless the user shall include with the information a copy of this disclaimer.

Ordering Instructions: Redwood County’s aggregate resource spatial datasets (shapefiles & file geodatabase) are included in the file redwooddata.zip, accessible from the MN DNR Aggregate Mapping web page: http://www.dnr.state.mn.us/lands_minerals/aggregate_maps/completed/index.html
The spatial datasets include sand and gravel resource potential, geologic field observations, aggregate pits, Minnesota Geological Survey (MGS) County Well Index (CWI) data points, MnDOT Aggregate Source Information System (ASIS) points, and MnDOT ASIS pit quality table.

Online Linkage: I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

Section 7: Metadata Reference

Metadata Date: 10/02/2022

Contact Person Information: ,


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Phone:
Email:

Metadata Standard Name: Minnesota Geographic Metadata Guidelines

Metadata Standard Version: 1.2



This page last updated: 10/02/2022
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