Stability and precision in chronostratigraphic definition: The Global Boundary Stratotype Section and Point (GSSP) is the solution
Bibliographic record
Abstract
The concept of the Global Boundary Stratotype Section and Point (GSSP) to define the bases of chronostratigraphic units, indicated by a spike in rock, has endured for over half a century. Each boundary is defined by a spike in a rock succession, coincident with available biological and or other markers and represents a unique point in time to serve as the standard (yardstick) against which other successions can be correlated. The GSSPs are geological standards, referred to as stratotypes and are key reference points in time. The methodology has brought precision and stability to the definition of geological time, providing a global language for Earth science and Earth scientists. It is the largest cooperative venture in the history of the Earth sciences. In recent years, some challenges to this practice have been voiced questioning the validity of the GSSP concept. It is thus opportune to address misconceptions and misunderstandings and clearly reiterate the necessity of this approach and its success. • The Global Boundary Stratotype Section and Point (GSSP) is the key method for defining geological time. • Outlines the historical development and necessity of a standardized geological timescale. • Counters criticisms of the GSSP concept and clarifies misconceptions. • Highlights integration of biological and non-biological markers for global correlation. • In conclusion the GSSP approach is the best way to define and correlate geological time.
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 | 0.036 | 0.067 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.004 | 0.005 |
| Science and technology studies | 0.002 | 0.016 |
| Scholarly communication | 0.007 | 0.014 |
| Open science | 0.002 | 0.006 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.003 | 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".