| Importance : |
1 vol. (III-A1-A24 pages -5 feuilles de planches) |
| Résumé : |
The highest Jurassic (Tithonian) and lowest Cretaceous (Berriasian-Valanginian) beds exposed in the Colyear Springs-Paskenta area of northwestern California consist of 12,000-25,000 feet, or more, of interbedded and intertonguing mudstone,sandstone, and conglomerate that are characterized faunally by an abundance of the pelecypod Buchia. These beds are difficult to correlate lithologically for more than a few miles because of the presence of three major faults and the lack of persistent marker beds. |
551 Géologie, hydrologie, météorologie
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheL'Overthrust Belt face aux Uinta Mountains (Utah, U.S.A.) (1984)
