Bibliographic record
Abstract
The Yalgorup Plain is a well preserved late Pleistocene coastal plain in the Perth Basin, southwestern Australia. The carbonate and siliciclastic sediment sequences therein show that Pleistocene palaeo-coastal sedimentation was dominated by narrow beachridge plains developed as ribbon shoreline deposits and cuspate forelands behind offshore barrier limestone islands and rock y reefs. The key to interpreting the Pleistocene sequences and their sea level history lies in the Holocene models in the same region, especially in the geomorphology and stratigraphy of coast types such as barrier dunes , estuarine lagoons and large-scale cuspate beachridge plains and in the small-scale stratigraphy in beach/dune sequences, shore face sequences, rocky shores and seagrass banks of the Holocene models. The Pleistocene sequences contain 11 main sediment/rock types: (1) bioturbated foraminiferal calcarenite, (2) shelly/bioturbated calcarenite, (3) laminated shelly calcarenite /coquina, (4) laminated and cross-laminated marine calcarenite , (5) laminated to cross-laminated beach calcarenite, (6) cross -laminated to structureless aeolian calcarenite, (7) calcreted limestone, (8) indurated, bored limestone, (9) shelly calcilutite, (10) quartz sand, and (11) shelly mud. Sedimentation took place within a linear seaway between a hinterland ridge and two lines of offshore limestone rocky reefs. Evolution of the Yalgorup coastal plain took place in several stages related to sea level still-stands in the Pleistocene: (1) formation of an older Pleistocene limestone beachridge plain (Youdaland), within which there was shoaling from marine seagrass carbonate sedimentation to beach to beachridges/dunes; (2) accumulat ion of quartz rich coastal sand barriers (Myalup Sand Shelf and Myalup Sand Ridge); (3) formation of a younger Pleistocene limestone beachridge plain (Kooallupland) within which there was, again, shoaling from marine seagrass carbonate sedimentation to beach to beachridges/dunes. The overall progressive accretion of the Yalorup Plain records, with subaerial interruptions: (1) sedimentation and progradation in a coastal setting partly behind offshore rocky reefs , (2) changes in style from cuspate foreland and shoreface accretion to coastal barriers, and (3) alternation in sedimentation from carbonate-rich to quartz-rich. Progradation was most marked under two sets of conditions: where carbonate production was active, with sufficient sediment production to promote progradation, and where there was shelter from open oceanic conditions, such as leeward of barrier ridges. When carbonate production was low, quartz sand from southern parts of the hinterland was reworked by coastal processes, and mobilised northwards to develop the shore-fringing, sand platform and a sandy barrier, but during this phase, there was no pronounced coastal accretion and progradation. The results of this study provide several insights: (1) the Quaternary history of the Perth Basin in southwestern Australia; (2) alternation of carbonate/siliciclastic sedimentation in general; (3) the control of the geometry of coastal sediment bodies by ancestral topography; (4) the longevity of limestone ridges in ancestral topography; and (5) the age structure of the Pleistocene coastal plains.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.005 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.003 |
| Bibliometrics | 0.004 | 0.003 |
| Science and technology studies | 0.003 | 0.003 |
| Scholarly communication | 0.005 | 0.008 |
| Open science | 0.006 | 0.005 |
| Research integrity | 0.008 | 0.004 |
| Insufficient payload (model declined to judge) | 0.993 | 0.995 |
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; the direct Gemma label and the distilled Codex classifier agree on what is shown here.
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".