AGGREGATE POTENTIAL – POLYGONS
DODGE COUNTY, MINNESOTA
Field |
Description |
Main ID Information |
Metadata Updated 2007 |
Title |
Dodge County Aggregate
Resource Evaluation |
Filename |
Cs02xpy3 (ArcView
Shapefile) |
Abstract |
This dataset consists
of information about the geology, geological characteristics, and aggregate
potential of bedrock units. Twelve
fields relate to crushed stone characteristics, including probability,
quality, overburden thickness, and deposit size, of the map unit. These characteristics were used to
calculate the aggregate potential of the map unit for crushed. |
Place Keywords |
Dodge County, Minnesota |
Theme Keywords |
Surficial Geology, Geological
Characteristics, Aggregate Potential, Crushed Stone |
Time Period of
Content |
Fall 2001 – Spring 2002 |
Parent Theme |
NA (FIELDOBS) |
Spatial Extent of
the Data |
Dodge County, Minnesota |
Contact Person |
Aggregate Resources
Mapping Program |
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 summarize the
geological characteristics, surficial geology, and crushed stone potential of
the different bedrock units. To help categorize
the geological characteristics and incorporate them into a model to help
determine the crushed stone potential of the deposit. |
Progress |
Complete |
Currentness
Reference |
All data was gathered
in the fall of 2001 and compiled in the fall of 2001 through the spring of
2002. |
Maintenance
Frequency |
None Planned |
Access Constraints |
NA |
Use Constraints |
NA |
Associated Data Sets |
County Aggregate
Mapping Program datasets for Dodge County, including data on sand and gravel potential,
crushed stone potential, field observations, rock piles, and test pit quality
data. |
Data Quality |
|
Attribute Accuracy |
|
Logical Consistency |
NA |
Completeness |
The crushed stone resource
units were delineated using depth to bedrock information from the county well
index, soil surveys, and field observations.
Generalizations were made; this is a reconnaissance-scale study
(1:100,000). |
Horizontal
Positional Accuracy |
1:100,000 for crushed
stone. |
Vertical Positional
Accuracy |
NA |
Lineage |
The first step in
determining the distribution of aggregate resources is to understand the
recent geological history of the area.
The geological history basically tells us the story, or sequence of
events, of when the aggregate and other sediments were deposited. By understanding this story we can
determine where the aggregate was deposited, as well as some of the general
characteristics about the material. The majority of the limestone was found along the eastern river valleys. Data about the bedrock and depth to bedrock includes well locations with well log information indicating a depth to bedrock; outcrops from the soil information; outcrops observed in the field. To interpret the depth to bedrock, contour lines were constructed by on-screen digitizing using ARCVIEW. |
Source Scale Denominator |
1:100,000 |
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 Extended |
Raster only |
|
Cell Width |
NA |
Cell Height |
NA |
Spatial Data Organization |
|
Geographic Reference
for Tabular Data |
|
Native Dataset
Environment |
ArcView 3.1/ArcInfo
8.0.2 |
Vendor Specific
Object Type |
Polygon |
Tiling Scheme |
County |
Spatial Object Type |
Polygon |
Transfer Size |
|
Entities -- Attributes |
|
Entity-Attribute
Overview |
The polygons of crushed stone potential. |
Entity-Attribute
Detailed Citation |
ArcView specific fields
include shape (i.e., feature type = polygon), area (given in square meters),
perimeter (given in meters), Cs02xpy3_ (counter field - assigned by the
software), and Cs02xpy3_i (an id usually assigned during theme creation). The aggregate potential attributes for the polygons are described in the table below. |
Table Name |
Field Name |
Begin Column |
Definition |
Valid Values |
Descriptions |
Cs02xpy3.dbf |
Bdrk_mapu |
|
Number,4,0 |
Ex: 305, 239, 303,etc…. |
Numbers assigned to
specific units of bedrock |
|
Bdrk_desc |
|
Text, 60 |
Ex: Bedrock-Galena-Prosser/Stewartville (Low) |
A short, summarized
description of the bedrock mapping units.
Names of units are based on established units for the bedrock of
southeastern Minnesota |
|
Cs_pot_pl1 |
|
Text, 17 |
Ex: Limited and Massive
Limestone. |
Crushed Stone Potential
that is depicted on plate 1 (Significant Aggregate Resources). Bedrock refers to those units that have a
high to moderate potential of containing significant crushed stone resources. Desirability is determined by the crushed
stone potential attributes (as described below). Limited implies that there
is little to no economic value to the bedrock unit. Massive Limestone implies that the limestone is thick with few
shale partings. |
|
Cs_pot_pl2 |
|
Text, 12 |
High, Moderate, Low,
Limited. |
Crushed Stone Potential
that is depicted on plate 2 (Aggregate Resources). High, Moderate, and Low refer to the relative potential of the
Crushed Stone resources. Desirability
is determined by the Crushed stone potential attributes (as described
below). Limited refers to those units
where the depth to crushed stone is greater than 40 feet. |
|
Cs_prob |
|
Text, 11 |
Very High, High,
Moderately High, Low. |
The relative degree of certainty
that crushed stone exists within a unit.
Based on air photo interpretations, field observations, CWI, drilling,
presence of quarries, etc. Each unit
is relative to the other units and range from very high to very low. |
|
Cs_thick |
|
Text, 10 |
Ex: >50 |
The assumed thickness
of the crushed stone (in feet). |
|
Cs_overbrd |
|
Text, 12 |
Ex:
0-20, 20-30, 30-40, >40. |
The assumed range of
overburden thickness of a crushed stone deposit (in feet). |
|
Cs_quality |
|
Text, 10 |
Ex: High, Limited, Low |
The quality of the
bedrock unit based on the number of shale partings. The lower amount of shale, the higher the quality. Limited includes non-crushed stone units
such as sandstones. |
|
Cs_min |
|
Number,3,0 |
Ex: 0,5,10,15,20,50 |
Describes the minimum
thickness of the crushed stone unit. |
|
Cs_max |
|
Number,3,0 |
Ex: 0, 5, 10, 20, 30,
40, 50 |
Describes the maximum
thickness of the crushed stone unit. |
|
Csover_min |
|
Number,3,0 |
Ex: 0, 10,20 |
Describes the minimum
thickness of the overburden covering the crushed stone. |
|
Csover_max |
|
Number,3,0 |
Ex: 0, 3, 5, 10, 20, 30 |
Describes the minimum
thickness of the overburden covering the crushed stone. |