Digital Representation of Isopach Maps for Selected Geologic Periods from an Atlas Published by Sloss and others (1960)
Bibliographic record
Abstract
This data release is the update of the U.S. Geological Survey - ScienceBase data release Sharpe and others (2024). Information of hydrogeologic and geologic importance from the book, "Lithofacies Maps: An Atlas of the United States and Southern Canada" (Sloss and others, 1960) detailing geologic periods, including the Cambrian, Ordovician, Silurian, and Devonian were digitized from scanned maps. Isopach contours were captured and, along with Geologic Map of North America (GMNA) information (Garrity and Soller, 2009), were used to interpolate thickness rasters for each period. Additionally, the lithofacies information on each map was also digitized. First release: November, 2024 Revision 2.0: July, 2026 Data from version 1.0 of the data release are available in the original formats as compressed (.zip) geodatabases (.gdb) of geologic period feature classes, including isopach contours, lithofacies, raster interpolation masks, control points, and thickness rasters. A layer file for symbolizing the lithofacies feature classes and the metadata document are also included. Data for version 2.0 of the data release includes, 1) step 3 masks as shapefiles for all geologic periods, available in Sloss_Isopach_Maps_Step3_Masks.zip, and 2) Step 3 thickness rasters as TIFs for all geologic periods, available in Sloss_Isopach_Maps_Step3_Thickness_Rasters.zip. Citations: Sharpe, J.B., Belitz, K., Fleming, B.J., and Donmoyer, S.J., 2024, Digital representation of isopach maps for selected geologic periods from an atlas published by Sloss and others (1960): U.S. Geological Survey data release, https://doi.org/10.5066/P1GFQCQX. Sloss, L.L., Dapples, E.C., and Krumbein, W.C., 1960, Lithofacies Maps: An Atlas of the United States and Southern Canada, John Wiley & Sons, Inc., 108 pages. Garrity, C.P., and Soller, D.R., 2009, Database of the Geologic Map of North America; adapted from the map by J.C. Reed, Jr. and others (2005): U.S. Geological Survey Data Series 424, http://pubs.usgs.gov/ds/424/.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.008 | 0.017 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.088 | 0.027 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".