Portal de Periódicos da CAPES

Late Cretaceous (Santonian-Campanian) stratigraphy of the northern Sacramento Valley, California

1984; Geological Society of America; Volume: 95; Issue: 5 Linguagem: Inglês

10.1130/0016-7606(1984)95 2.0.co;2

1943-2674

James W. Haggart, Peter D. Ward,

Paleontology and Stratigraphy of Fossils

Research Article| May 01, 1984 Late Cretaceous (Santonian-Campanian) stratigraphy of the northern Sacramento Valley, California JAMES W. HAGGART; JAMES W. HAGGART 1Department of Geology, University of California at Davis, Davis, California 95616 Search for other works by this author on: GSW Google Scholar PETER D. WARD PETER D. WARD 1Department of Geology, University of California at Davis, Davis, California 95616 Search for other works by this author on: GSW Google Scholar Author and Article Information JAMES W. HAGGART 1Department of Geology, University of California at Davis, Davis, California 95616 PETER D. WARD 1Department of Geology, University of California at Davis, Davis, California 95616 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1984) 95 (5): 618–627. https://doi.org/10.1130/0016-7606(1984)95 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation JAMES W. HAGGART, PETER D. WARD; Late Cretaceous (Santonian-Campanian) stratigraphy of the northern Sacramento Valley, California. GSA Bulletin 1984;; 95 (5): 618–627. doi: https://doi.org/10.1130/0016-7606(1984)95 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Upper Cretaceous (Coniacian–lower Campanian) Chico Formation of the northeastern Sacramento Valley, California, includes three newly defined members at the type locality: (1) cobble conglomerate of the basal Ponderosa Way Member, (2) coarse-grained conglomeratic sandstone of the overlying Musty Buck Member, and (3) fine-grained silty sandstone of the uppermost Ten Mile Member. Other outcrops of the Chico Formation exhibit the same three members plus an additional unit, the Kingsley Cave Member, composed of mudstone. The Chico Formation resulted from a transgression onto the Sierra Nevada basement in the Late Cretaceous. The Kingsley Cave Member was deposited locally in quiet-water conditions below wave base in an intrashelf basin and may represent a marine connection with regions farther northeast.Macrofossils allow correlation of the Chico Formation with marine deposits of the Great Valley sequence exposed along the western Sacramento Valley. Strata of the Guinda and Forbes Formations represent submarine fan-channel to outer-fan deposits of a shallowing Late Cretaceous fore-arc basin. The Santonian Guinda Formation, a massive sand unit deposited in fan-channel to distal-fan turbidite environments, is correlative with the Musty Buck and Kingsley Cave Members of the Chico Formation. The Dobbins Shale Member of the Forbes Formation, a widespread mudstone unit of hemipelagic outer-fan to basin-plain deposits, is correlative with the Kingsley Cave Member of the Chico Formation and reflects a Santonian transgressive event in the northern fore-arc basin. Mudstones and turbidites of the middle of the Forbes Formation are equivalent to the shallow-marine strata of the Ten Mile Member of the Chico Formation. Correlatives of younger Forbes Formation strata have not been positively identified from the Chico Creek region but may be represented by unfossiliferous, cross-bedded, coarse-grained sandstones found above sections of the Chico Formation. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.