Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by Tibert, N. E. Articles by Leckie, R. M. Search for Related Content GeoRef GeoRef Citation

HIGH-RESOLUTION ESTUARINE SEA LEVEL CYCLES FROM THE LATE CRETACEOUS: AMPLITUDE CONSTRAINTS USING AGGLUTINATED FORAMINIFERA

¹ Department of Environmental Science and Geology, 1301 College Avenue, Jepson Science Center, Mary Washington College, Fredericksburg VA 22401. E-mail: ntibert{at}mwc.edu
² Department of Geosciences, 611 North Pleasant St., University of Massachusetts, Amherst MA 01003.

Agglutinated foraminifera provide high-resolution proxies for relative sea level change in Late Cretaceous coal-bearing strata. Three foraminiferal assemblages are recognized where Trochammina (trochospiral) occurs in abundance with either one of the following: 1) Miliammina (quinqueloculine) associated with carbonaceous shale, interpreted as the marsh; 2) Ammobaculites (uncoiled) and estuarine ostracodes associated with shelly mudstones, interpreted as the central, muddy estuary; and 3) Verneulinoides and Textularia (serial) associated with gray mudstones, interpreted as distal estuary (open bay). The marsh represents 0–1 m water depth and this approximates absolute mean sea level, the central estuary represents 5–8 m water depth, and the distal estuary (open bay) represents water depths of 10 m or greater. Alternations between foraminiferal associations in a 25-m section of the upper middle Turonian Smoky Hollow Member, Straight Cliffs Formation, indicate sea level amplitude changes that ranged from 1–10 meters.

This article has been cited by other articles:

				F. Fiorini, F. Fiorini, D. B. Scott, and G. D. Wach Thecamoebians from the early Cretaceous of the Scotian Shelf Micropaleontology, November 1, 2007; 53(6): 511 - 516. [Abstract] [Full Text] [PDF]