. Maryland geological survey. wm%%smzffimm*s- 2 flg. 2.—vtew showing surface of lafayette plain near cheltenham, prince georges county. MARYLAND GEOLOGICAL SURVEY 37 eluded that they were Recent and gave them the name of the McIIenryformation. Dr. William H. Dall confined his observations to the localityat Wailes Bluff and stated that, while they have generally been referredto the Pleistocene, it is probable that they will actually be found onfurther research to be Pliocene in age. The author, who had enjoyedgreater opportunities for studying these clay lenses and had observed themin various p
. Maryland geological survey. wm%%smzffimm*s- 2 flg. 2.—vtew showing surface of lafayette plain near cheltenham, prince georges county. MARYLAND GEOLOGICAL SURVEY 37 eluded that they were Recent and gave them the name of the McIIenryformation. Dr. William H. Dall confined his observations to the localityat Wailes Bluff and stated that, while they have generally been referredto the Pleistocene, it is probable that they will actually be found onfurther research to be Pliocene in age. The author, who had enjoyedgreater opportunities for studying these clay lenses and had observed themin various parts of tide-water Maryland, suggested that they all belongedto one formation and thought it not unlikely that subsequent investiga-tions would show that they were contemporaneous with the famous PishHouse clays near Philadelphia in New Jersey. Three years later in1901, after further study, he concluded that all of these clay lenses be-longed to one formation and were a part of the latest Pleistocene form-ation, the Talbot.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1901
