Subsurface Stratigraphy and Water Resources of Delaware

Dr. Peter McLaughlin of the Delaware Geological Survey and I supervise students who are studying the occurrence of formations in the subsurface of Delaware that serve as important aquifers and aquicludes.  We are using foraminiferal assemblages and strontium isotope stratigraphy to better delineate the occurrence of these units and different facies (environments).

Calvert Cliffs 2ACoring 1Coring 2

LEFT: Some of the important formations that serve as aquicludes in Delaware crop out at the Calvert Cliffs along Chesapeake Bay because of the their regional dip.  Here one sees the St. Mary's Formation (grayish bands in the middle of the outcrop) cropping out above the upper portion of the Choptank Formation,which extends down to the intertidal zone.  The identity and age of the tan unit above the St. Mary's is uncertain but it may be related to surficial deposits also found in Delaware.

CENTER AND RIGHT: These units are found in the subsurface of Delaware

RON MARTIN BIOSTRATIGRAPHY PUBLICATIONS—AUGUST, 2013
Martin, R. E. The history of Gulf Coast micropaleontology: from biostratigraphy to chronostratigraphy. In Bowden, A. et al. (Ed.). Landmarks in Foraminiferal Micropalaeontology: History and Development. Geological Society of London Special Publication (for The Micropalaeontological Society), pp. 103-123. (Invited Paper).

Martin, R. E. and Fletcher, R. R. 1995. Graphic correlation of Plio-Pleistocene sequence boundaries, Gulf of Mexico: oxygen isotopes, ice volume, and sea level. In Mann, K.O. et al. (Eds.) Graphic Correlation and the Composite Standard: The Methods and Their Applications. Tulsa: SEPM Special Publication No. 53, p. 235-248. .

Martin, R. E., and Fletcher, R. R. 1993. Biostratigraphic expression of Plio-Pleistocene sequence boundaries, Gulf of Mexico. In Armentrout, J. M. et al., eds., Rates of Geologic Processes: Tectonics, Sedimentation, Eustasy and Climate. Society of Economic Paleontologists and Mineralogists (Gulf Coast Section) 14th Annual Research Conference, Houston, TX, December 5-8, Program with Papers, p. 119-126.

Martin, R. E., Neff, E. D., Johnson, G. W., and Krantz, D. E. 1993. Biostratigraphic expression of Pleistocene sequence boundaries, Gulf of Mexico. Palaios 8: 155-171.
Martin, R. E., Neff, E. D., Johnson, G. W., and Krantz, D. E. 1990. Biostratigraphy of the Pleistocene: The Ericson and Wollin zonation revisited. In Armentrout, J.M. et al. (Eds.) Sequence Stratigraphy as an Exploration Tool: Concepts and Practices in the Gulf Coast, SEPM (Gulf Coast Section) Eleventh Annual Research Conference, Houston, TX, December 2-5, Program with Papers, p. 229-236.

Martin, R. E., Johnson, G. W., Neff, E. D., and Krantz, D. E. 1990. Quaternary planktonic foraminiferal assemblage zones of the northeast Gulf of Mexico, Colombia Basin (Caribbean Sea), and tropical Atlantic Ocean: graphic correlation of microfossil and oxygen isotope datums. Paleoceanography 5: 531-555.

UNPUBLISHED REPORT
Martin, R. E. 1984. Plio-Pleistocene cyclic sedimentation at East Breaks field: an integrated model for deep-water
sand exploration. In-house report to Union Oil Company of California on the effects of Plio-Pleistocene eustatic sea level fluctuations on foraminiferal and nannofossil assemblages ("ecostratigraphy") in an oil and gas field developed by Union Oil. The study integrated paleontologic, well-log, geochemical, and seismic data to produce a model for deep-water (turbidite) reservoir sand exploration.

 

Subsurface Stratigraphy and Water Resources of Delaware

Formations in the subsurface of Delaware crop out at Calvert Cliffs along Chesapeake Bay

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Ronald Martin

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Professor Geological Sciences

 

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