About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
GCAGS Transactions
Abstract
Carbonate Cycles in Upper Cretaceous (Campanian) Demopolis Chalk, West-Central Alabama
Jeffrey D. Warren (1), Charles E. Savrda (2)
ABSTRACT
Carbonate and organic (TOC, palynofacies, and pyrolysis) analyses of the Upper Cretaceous (Campanian) Demopolis Chalk in western Alabama were undertaken to assess the character and origin of decimeter-scale carbonate rhythms expressed therein. Stratofabric and spectral analyses of carbonate time series indicate that depositional cyclicity was controlled by climate perturbations induced by all three Milankovitch orbital parameters (eccentricity, precession, and obliquity). Modeling of changes in total sediment and organic accumulation rates with changes in carbonate content, along with other organic evidence, indicate that carbonate rhythms were caused by climate-mediated variations in clastic sediment delivery to the Gulf margin (i.e., dilution cycles).
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 | |
Open PDF Document: $24 |