SURFICIAL GEOLOGY



Field

Description

Main ID Information

Metadata Updated 2007

Title

Nicollet County Aggregate Resource Evaluation - Surficial Geology

Filename

Burydep (ArcView Shapefile)

Abstract

This is a single polygon that outlines a large buried sand and gravel deposit. The deposit is located north of Courtland, Minnesota

Place Keywords

Nicollet County, Minnesota

Theme Keywords

Buried Deposit, Sand and Gravel, Potential

Time Period of Content

Summer and Fall 1999

Parent Theme

(CWI99PT3 and CWI_GEOD.dbf)

Spatial Extent of the Data

Nicollet County, Minnesota

Contact Person

Aggregate Resource Mapping Program (Geologist or GIS Specialist)
Minnesota Department of Natural Resources, Division of Lands and Minerals
500 Lafayette Road, Box 45

St. Paul, MN 55155-4045
Phone: 651-259-5959
FAX:  651-296-5939
E-mail: AggregateMap@dnr.state.mn.us

Contact Person Organization/Division

Department of Natural Resources, Division of Lands and Minerals

Contact Person Position

Geologist or GIS Specialist

Contact Address

500 Lafayette Road, Box 45

Contact City

St. Paul

Contact Zip Code

55155-4045

Contact Voice Phone

651-259-5959

Contact Fax Phone

651-296-5939

Additional ID Information

 

Originator

Department of Natural Resources, Division of Lands and Minerals, Mineral Potential Section

Purpose

To define a single polygon that outlines a large buried sand and gravel deposit. The deposit is located north of Courtland, Minnesota To help catagorize the extent, overburden thickness, and aggregate thickness of this unit and incorporate them into a model to help determine the geological potential of the deposit.

Progress

Complete

Currentness Reference

All data was gathered in the fall of 1999 and the spring of 2000 and compiled in the Summer and Fall of 2000.

Maintenance Frequency

None Planned

Access Constraints

NA

Use Constraints

NA

Associated Data Sets

County Well Index CWI (CWI99PT3 and CWI_GEOD.dbf).

Data Quality

 

Attribute Accuracy

The unit was defined by analyzing the well logs and their descriptions and a boundary was estimated only on those wells. Approximate location of the deposit within a few hundred yards.

Logical Consistency

NA

Completeness

The units were delineated by analyzing the well logs and their descriptions and a boundary was estimated only on those wells aerial photograph interpretations. The potential of the deposit is based on geological factors and not economical factors. Generalizations were made, this is a reconnaissance scale study (1:50,000)

Horizontal Positional Accuracy

1:50000

Vertical Positional Accuracy

NA

Lineage

The potential of this deposit is based only on the CWI date, which include the overburden thickness, aggregate thickness, and type of material encountered. None of this material was sample for quality analyis.

Source Scale Denominator

1:50000

Spatial Reference

 

Horizontal Coordinate Scheme

UTM

Ellipsoid

GRS80

Horizontal Datum

NAD83

Horizontal Units

Meters

Distance Resolution

NA

Altitude Datum

NA

Altitude Units

NA

Depth Datum

NA

Depth Units

NA

UTM Zone Number

15

Raster only

 

Cell Width

NA

Cell Height

NA

Spatial Data Organization

 

Geographic Reference for Tabular Data

The unit is referenced as a geological feature (buried glaciofluvial fan).

Native Dataset Environment

ArcView 3.1/ArcInfo 8.0.2

Vendor Specific Object Type

NA

Tiling Scheme

County

Spatial Object Type

Vector-polygon

Transfer Size

7 kb

Entities -- Attributes

 

Entity-Attribute Overview

Attributed describe the thickness of the overburden and the aggregate.

Entity-Attribute Detailed Citation

See table below: Arcview specific fields include shape (i.e., feature type = polygon), area (given in square meters), perimeter (given in meters), filename_ (unique id for polygon, assigned by the software), filename_i or filename_id if filename is less than 8 characters (an id usually assigned during theme creation).





Table Name

Field Name

Begin Column

Definition

Valid Values

Descriptions

BURYDEP

Overburden

 

Text, 16

20-75 feet

Described the range of overburden thickness.

 

Aggregate

 

Text, 16

30-120 feet

Described the range of aggregate thickness under the overburden.



Over_avg

 

Text, 8

37 feet

Describes the average thickness of the overburden.



Aggr_avg

 

Text, 8

80 feet

Describes the average thickness of the aggregate.