{"id":"W2022337615","doi":"10.1016/j.palaeo.2009.03.007","title":"Carbon isotopes and event stratigraphy near the Ordovician–Silurian boundary, Yichang, South China","year":2009,"lang":"en","type":"article","venue":"Palaeogeography Palaeoclimatology Palaeoecology","topic":"Paleontology and Stratigraphy of Fossils","field":"Earth and Planetary Sciences","cited_by":157,"is_retracted":false,"has_abstract":false,"ca_institutions":"St. Francis Xavier University","funders":"","keywords":"Ordovician; Biozone; Geology; Paleontology; Glacial period; Global Boundary Stratotype Section and Point; Chronostratigraphy; Stratigraphy; Stage (stratigraphy); Biostratigraphy; Sedimentary rock; Tectonics","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":["metaepi_narrow","sts"],"consensus_categories":["sts"],"category_scores_codex":[0.001030672,0.000865855,0.00113434,0.0006309482,0.002289826,0.0003040444,0.000970441,0.0008184346,0.0004535817],"category_scores_gemma":[0.0001155162,0.0006476523,0.0005395781,0.001154162,0.003886885,0.0002500874,0.00001983578,0.001117531,0.00004019117],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000004795674,"about_ca_system_score_gemma":0.0002167081,"about_ca_topic_candidate":true,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0008817378,"about_ca_topic_score_gemma":0.02903422,"domain_scores_codex":[0.9943967,0.0009987243,0.001026258,0.001304306,0.0004265034,0.001847435],"domain_scores_gemma":[0.9973331,0.0006165631,0.0005377778,0.0009159102,0.00009814672,0.0004984766],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0001493558,0.00009330202,0.955092,0.00002506187,0.0002306509,0.0001527532,0.00148793,0.00002994492,0.0000174251,0.002707295,0.00009881325,0.03991546],"study_design_scores_gemma":[0.001142776,0.001141303,0.9733037,0.00002359047,0.0002055589,0.0005254774,0.0005358236,0.001360336,0.00001745245,0.01915576,0.001885353,0.0007028634],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9274617,0.01898096,0.00005965778,0.006052542,0.0009719993,0.001002458,0.0001169239,0.000285762,0.04506798],"genre_scores_gemma":[0.9969959,0.0006298685,0.0008179388,0.001258276,0.0001751845,0.0000343934,0.0000645559,0.000008430736,0.00001540471],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.06953423,"threshold_uncertainty_score":0.9995975,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.006530087085788809,"score_gpt":0.2126527861613741,"score_spread":0.2061226990755853,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}