The Upper Jurassic-Upper Cretaceous magmatic sequence of the Cordillera Central, Dominican Republic
Bibliographic record
Abstract
the Cordillera Central domain, located southern of the Hispaniola Fault Zone, an Upper Jurassic-Upper Cretaceous magmatic sequence is recognized, which includes eight lithostratigraphic-geochemical units formed by a great variety of plutonic, volcanic, volcaniclastic and sedimentary rocks. The three lowermost units have an ophiolitic character, since it is considered oceanic lithosphere with its typical pseudostratigraphy though incomplete: upper mantle rocks are represented by the Loma Caribe serpentinized peridotite; gabbros, dolerites and volcanic MORB-rocks by the oceanic volcano-plutonic assemblage of the Loma La Monja; and the pelagic sediments by the El Aguacate Chert, lacking the crustal terms of layered cumulate gabbros and part of the dyke-complex. Over this Late Jurassic proto- Caribbean oceanic sustrate, an event of Caribbean oceanic plateau formation during the Lower Cretaceous (Albian) is superposed and represented by the picrites and high-Mg basalts of the Duarte Complex. The overlying volcanic and subvolcanic rocks of the Tireo Group are related to subduction processes under the oceanic plateau in the Late Cretaceous. Subduction-zone formation in the Albian gave rise a typical island arc tholeiitic magmas, that compositionally shift to an association of adakites, high-Mg andesites and Nb-enriched basalts in the Turonian-Santonian interval. The tholeiitic, transitional and alkaline basalts of the Peña Blanca, Pelona-Pico Duarte and Magua Fms, represent new plume-related intraplate magmatism in the Late Campanian-Maastrichtian. The Caribbean island arc inactivity is recorded in this area with the subsequent carbonate sedimentation of the Bois de Lawrence Fm during the Maastrichtian.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.005 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.020 | 0.000 |
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; both teacher heads 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".