Maryland Geological Survey 05 



The Magothy formation is evidently equivalent to the lower part of 

 the Black Creek formation of North Carolina, which also embraces in its 

 upper part the Matawan formation as well. In the Black Creek forma- 

 tion the beds containing the typical Magothy flora and strata bearing 

 the marine Matawan fauna are found interstratifled. The Magothy has 

 also been correlated with the Tuscaloosa deposits of western Alabama, 

 although the latter is likewise the equivalent in part of the Matawan. 

 The Magothy formation is referred to the Turonian in the European scale. 



The Matawan Formation 



Name and Synonymy. — The Matawan formation, so named by the 

 writer * from Matawan Creek, New Jersey, where deposits of this age are 

 extensively developed, is also applied to the extension of these strata into 

 Maryland. The term Clay Marls was long used for these deposits in 

 New Jersey. Darton described under the name of the Severn formation 

 in the Maryland area both the Matawan and Monmouth formations. 

 Uhler proposed a number of lithologic units, the stratigraphic relations 

 of which are undeterminable, for these deposits. The writer divided the 

 Matawan formation in New Jersey, from below upward, into the Cross- 

 wicks clays and Hazlet sands, and the New Jersey geologists have still 

 further divided the Crosswicks clays into the Merchantville clay and the 

 Woodbury clay, and the Hazlet sands into the Englishtown sand, the 

 Marshalltown formation, and Wenona sand, the term Matawan being 

 retained as a group term to include these five formations in New Jersey. 

 It has been impossible, however, to satisfactorily recognize these sub- 

 divisions of the Matawan to the south of the Delaware basin. 



Areal Distribution.- — The Matawan formation has been traced from 

 the Delaware line across Cecil and Kent counties to the shore of the 

 Chesapeake, beyond which it is again found outcropping in Anne Arundel 

 and northern Prince George's counties, beyond which it is overlapped 

 by later formations. The width of outcrop on the Eastern Shore is 



'Clark, Wm. Bullock, Jour. Geol., vol. ii, pp. 163, 164, 1894; Bull. Geol. Soc. 

 Amer., vol. vi, p. 481, 1894. 



