|
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) St. Paul, MN 55155-4045 |
|
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. |