Depositional Setting and Quaternary Stratigraphy of the Sheepscot Estuary, Maine: A Preliminary Report
Bibliographic record
Abstract
The Sheepscot River estuary in west-central coastal Maine is a typical example of a long linear embayment sculpted by glacial ice flowing nearly parallel to bedrock strike. After initial déglaciation 13,500 yrs. BP it was covered by glaciomarine mud, the Presumpscot Formation. Isostatic rebound resulted in a rapid sea-level fall and the channeling, winnowing, and consolidation of the Presumpscot Formation, until sea-level reached a lowstand about 65 m below present, 9500 yrs. BP. Subsequent sea-level rise caused flooding of the paleovalley of the Sheepscot, with reworking of the Pleistocene. High resolution seismic reflection profiling, vibracoring, and surficial mapping has allowed reconstruction of the Quaternary stratigraphy and the generation of an evolutionary model of sedimentary environments. At present the estuary exhibits three zones : an outer zone stripped of sediment, a middle zone undergoing erosion by tidal currents and slumping on bluffs and channel margins, and an inner zone of sediment accumulation on flats and in marshes, with redistribution of sediments by tidal currents. This three-fold division held throughout the Holocene transgression, with sediments being temporarily stored in the upper regions of the estuary, and reworked as sea-level rise continued.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".