Illinois strike and dip data
29 structural measurements in Illinois, digitized from 20 published geologic maps across 3 sources. Every row carries its azimuth, inclination, measurement type, location confidence and the citation of the map it came from.
- 29Measurements
- 20Published maps
- 18Vein / dike
- 3Sources
What kinds of measurement
The Atlas separates planar structures, recorded as a strike and dip, from linear ones, recorded as a trend and plunge. This is what Illinois holds:
| Measurement type | Geometry | Measurements | Share |
|---|---|---|---|
| Vein / dike | Planar — strike and dip | 18 | 62% |
| Joint | Planar — strike and dip | 6 | 21% |
| Other | Planar — strike and dip | 5 | 17% |
Where the data comes from
Each source is a survey, agency or program whose published mapping was harvested and reconciled into one schema. Rows are published only where the source's terms permit redistribution.
| Source | Measurements | Share |
|---|---|---|
| USGS data releases · MRDS | 18 | 62% |
| Wisconsin WGNHS | 6 | 21% |
| NGMDB legacy quads | 5 | 17% |
Most-measured published maps
The individual quadrangles and data releases contributing the most measurements in Illinois. The full
citation for every map behind a selection ships in the sources.csv of any export.
Most-measured map units
Where a source recorded the geologic unit a measurement was taken on, the Atlas keeps it. These are the units carrying the most measurements in Illinois.
| Map unit | Age | Lithology | Measurements |
|---|---|---|---|
| Og | — | — | 6 |
Other states
- California97,406
- Washington71,801
- Colorado52,728
- Montana48,678
- Alaska48,016
- Idaho44,711
- Virginia42,037
- Oregon40,354
- South Dakota37,339
- Vermont34,205
- Arizona30,474
- Pennsylvania29,970
- Maine26,897
- New Hampshire26,822
- North Carolina18,758
- Wyoming17,904
- Nevada12,581
- Connecticut11,563
- Utah9,589
- Wisconsin8,802
- Massachusetts8,162
- New Jersey7,797
- New York7,202
- Maryland7,019
- All states →