High-resolution Sequence Stratigraphy and Implications For Cretaceous Glacioeustasy of the Late Cretaceous Gallup System, New Mexico, U.S.A.
Notice bibliographique
Résumé
Abstract Deciphering the relationships between traditional lithostratigraphy and sequence stratigraphy is the key to correctly understanding time-stratigraphic relationships and basin evolution. Both insufficient sample spacing, which induces “aliasing,” and lack of datums are problematic issues for sequence stratigraphic correlation. High-resolution sequence stratigraphic analysis of the Cretaceous Gallup Formation, deposited during the late Turonian to early Coniacian, documents the high-frequency depositional cyclicity using detailed facies analysis in extensively exposed outcrops in northwestern New Mexico, USA. Seventy-one sedimentological sections were measured along the depositional-dip-oriented outcrop belt, with less than 1 km average distance between measured sections. Laterally extensive bentonite layers, deposited on nearly horizontal seabeds, provide chronological control and are used as datums for accurate correlations with minimal stratigraphic distortion. Based on the integration of key bounding surfaces with detailed facies analysis, twelve stratigraphic sequences, consisting of twenty-six parasequence sets composed of sixty-one parasequences, were identified. Four classes of shoreline trajectory are quantified: ascending regressive with accelerating and decelerating rates, descending regressive, and transgressive. The maximum shoreline transgression and regression of individual parasequence sets are up to 60 km and 48 km respectively. The maximum estimated relative sea-level fall and rise of individual parasequence sets are 34 m and 38 m. Parasequence sets show aggradational–progradational, retrogradational, progradational–aggradational, and degradational stacking patterns. These accommodation successions help to define systems tracts. The results show that the previously mapped sandstone tongues are equivalent to high-frequency sequence sets. Chronostratigraphic analysis shows that the Dilco Member is diachronous and correlated to different sequences. The Torrivio Member fluvial sandstone was probably deposited diachronously, and part of it may be Gallup age. The matching magnitudes of relative sea-level falls and rises, and an absence of evidence of tectonism, suggest a eustatic control. Autogenic processes may have operated during deposition but were not the dominant controls. The estimated depositional durations of sequence, parasequence set, and parasequence are 100 kyr, 46.2 kyr, and 19.7 kyr, respectively, implying that Milankovitch-cycle-dominated glacio-eustasy may be the key control on the high-frequency sequence stratigraphy of the Gallup system in greenhouse age.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».