Rhode Island strike and dip data
222 structural measurements in Rhode Island, digitized from 4 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.
- 222Measurements
- 4Published maps
- 127Other
- 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 Rhode Island holds:
| Measurement type | Geometry | Measurements | Share |
|---|---|---|---|
| Other | Planar — strike and dip | 127 | 57% |
| Lineation (mineral, stretching) | Linear — trend and plunge | 81 | 36% |
| Foliation | Planar — strike and dip | 14 | 6% |
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 SIM quads (NE) | 155 | 70% |
| NGMDB legacy quads | 53 | 24% |
| Connecticut Geol. Survey | 14 | 6% |
Most-measured published maps
The individual quadrangles and data releases contributing the most measurements in Rhode Island. The full
citation for every map behind a selection ships in the sources.csv of any export.
| Published map | Year | Scale | Measurements |
|---|---|---|---|
| SIM bedrock quadrangle databases, New England | — | 1:24,000 | 155 |
| Quaternary geologic map of the Boston 4 degrees x 6 degrees quadrangle, United States and Canada | 1991 | 1:1,000,000 | 30 |
| Bedrock geologic map of the Uxbridge quadrangle, Worcester County, Massachusetts, and Providence County, Rhode Island | 2014 | 1:24,000 | 23 |
| Rodgers-Compilations | — | 1:50,000 | 14 |
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 Rhode Island.
| Map unit | Age | Lithology | Measurements |
|---|---|---|---|
| Ponaganset Zpg | n | — | 34 |
| Northbridge Zncg | n | — | 21 |
| Ponaganset Zpg | — | — | 18 |
| Northbridge Zncg | — | — | 17 |
| Blackstone Zb | n | — | 12 |
| Blackstone Zb | n+1 | — | 9 |
| Blackstone Zb | — | — | 7 |
| Zsp | — | — | 5 |
| Zss | — | — | 5 |
| Blackstone Zbm | n | — | 5 |
| Blackstone Zbm | n+1 | — | 4 |
| tonalite Zt | n | — | 4 |
Other states
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