Etude lithostratigraphique et aperçu paléontologique du Miocène supérieur de Marsa Ben M'hidi (Bassin de Msirda, Algérie
Bibliographic record
Abstract
formation. RESUME L'étude des dépôts sédimentaires marins (Miocène supérieur) de la région de Marsa Ben M'hidi (Algérie nord occidentale) a permis de la subdiviser en deux ensembles lithostratigraphiques: Une formation des marnes bleues constituée de deux membres, l'un de calcaires gréseux, l'autre marneux; une formation de marnes diatomitiques. L'ensemble est - discordant sur un substratum de coulés andésitiques d'âge miocène. L'étude biostratigraphique, basée sur la répartition verticale des foraminifères -- planctoniques, notamment marqueurs, a permis de définir trois biozones: la zone à Neogloboquadrina acostensis, la zone à Neogloboquadrina dutertrei / Neogloboquadrina humerosa et la zone à Globorotalia mediterranea couvrants un intervalle de temps compris entre le Tortonien et le Messinien. L'analyse et l'étude paléontologique de la microfaune et la macrofaune récoltées a permis d'inventorier une espèce de Gastéropode, 5 espèces de lamellibranches, un poisson requin, des radioles d'oursins et notamment 26 espèces de foraminifères planctoniques regroupés en 6 genres. Mots- clés: Algérie, Bassin de Msirda, Miocène supérieur, biostratigraphie, paléontologie. Abstract The study of marinsedimantary deposits (upper Miocene) in the locality of Marsa ben M'hidi has characterized two formations: the blue maris formation that is subdivised into limestone-sandstone member and marly member And the diatomitic maris formation. Ail the formations are discordant on an andesitic miocenesubstartum. The biostratigraphic study is based on the vertical repartition of planctik foraminifera and indicator ones. It aliows the subdivision of the section into tree biozones: with Neogloboquadrinaacostensis, Neogloboquadrinadutertreil Neogloboquadrinahumerosaandwith Globorotaliamediterranea. Thesebiozonesrange in range fromTortonian to Messinian. The study and the paleontologicanalyseof microfauna and macrofauna have identified a new spiCe5 of gasteropod, 5 spices of lamellibranches, shark fish and radiolesd'oursins. 26 spices of planctik foraminifera have been also identified regouped into 6 genus. Key-words:Algeria,M'sirda basin, upper Miocene, biostratigraphy, planctik foraminifera
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 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; a candidate call from one teacher head, 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".