172 Revieics — United States Geological Survey. 



depths, and a comparison with those in strata of corresponding age 

 in Belgium and East-Anglia. 



The strata pierced in these -well-borings consist entirely of beds 

 of gravel, sand and clay, of Tertiary and Quaternary age, some 

 barren of fossils, others with shells, bryozoa and other fossils. There 

 are 131 species enumerated, all of which have been previously 

 described. In the Goes boring the entire thickness of the Pliocene 

 is penetrated. The Lower Pliocene or Diestien, the equivalent of 

 the Coralline Crag, has a thickness of 37 metres. It contains a certain 

 proportion of Polyzoa and appears to have been deposited in a 

 tolerably deep sea. It rests upon the Eupelien clay of Middle 

 Oligocene age. The Upper Pliocene or Scaldisien, the equivalent 

 of the Eed Crag of East-Anglia, has a thickness at Goes of between 

 23 and 29 metres. Above this comes the so-called Diluvial beds, 

 about 47 metres in thickness. At Utrecht the Diestien beds have 

 a minimum thickness of 125 m. and their base is not reached. They 

 are principally greyish-green sands with intervening bands of clay, 

 and the absence of Polyzoa and the broken condition of the shells 

 indicate a shallower sea than at Goes. The Scaldisien or Eed Crag 

 has a thickness of 82 m., and there are above it beds of Quaternary 

 and Eecent age 162 m. in thickness. At Gorkum the base of the 

 Scaldisien or Eed Crag was not reached at the depth of 182 m. 

 This deposit has thus a minimum thickness of 62 m., and from the 

 fragmentary and triturated shells therein, it appears to be of littoral 

 origin. Above this are freshwater beds, 28 m. in thickness, of 

 Quaternary age. With the exception of the first 12 m. of recent 

 deposits, the intervening strata 80 m. in thickness are also of 

 Quaternary age. 



This memoir is a valuable contribution to the history of the later 

 fossiliferous strata in a new area, and it has a special interest to the 

 student of the corresponding beds in East-Anglia. G. J. H. 



EEYIE "W S- 



I. — Bulletins of the United States Geological Survey. Nos. 

 1-19. (Government Printing Office, Washington, 1884-5.) 



IN addition to the large volumes of the Annual Eeports, and the 

 magnificent Monographs, the United States Geological Survey 

 are also issuing a series of Bulletins, each on a special subject and 

 complete by itself. Nineteen of these papers have already been 

 published. Some of them, it is true, treat of subjects which are but 

 remotely connected with geological research, as, for instance, " Gold 

 and Silver Conversion Tables," giving the coining value of Troy 

 ounces of fine metal, etc., and "Boundaries of the United States and 

 of the several States and Territories ; " others, though not directly 

 geological, are of great practical value to all geologists working in 

 the United States and Canada, as, for example, " A Dictionary of 

 Altitudes in the United States " and " Elevations in the Dominion of 



