128 



GEOLOGY AND PALEONTOLOGY. 



developed in New Jersey ; and it is the more interesting since it enables us to show the true 

 position of certain well marked and widely distributed cretaceous fossils, in relation to others 

 which approximate in character to Tertiary types. 



The following section gives the expression of all that is at present known regarding the order 

 of succession among the members of the system as they occur in eastern New Jersey.* 



VIII 



VII 



fVI 



IV 



III 



II 



Divisions, lithological 

 cliaracters, etc. 



General remarks, sub-divisions, etc. 



Green sand, 3d or upper This bed admits of a triple division, the cen- 

 tral portion is nearly destitute of fossils, 

 while those of the upper and lower divis- 

 ions are mostly dissimilar. 



This bed is (so far as known) quite destitute 

 of fossils. 



(o) Yellow limestone of Timber creek 



bed. 



Quartzose sand, resem- 

 bling beach sand. 

 Green sand, 2d bed . . . . 



Quartzose sand, highly 

 ferruginous through- 

 out, and argillaceous 

 in its upper part. 



Green sand, 1st or lower 

 bed. 



Dark colored clay, con- 

 taining green sand in 

 irregular stripes and 

 spots. 



(6) A bed of nearly unchanged shells. 



(c) Green sand, etc. 



This rock is sometimes indurated or cemented 

 by oxide of iron. 



Several subdivisions may be recognized, de- 

 pending on the character of the marl, etc. 



Position of beds J^os. 2 and 3 of the J^ebraska 

 section. 



Dark colored clay i At the present time the evidence tends to 



show that No. 1 of the Nebraska section 

 is represented here by Nos. 1 and 2, and 

 that Nos 2 and 3 of the Nebraska section 

 are wanting,and would find a place between 

 Nos. 2 and 3 of this section, if existing. 



Fire clay and potters' 

 clay. 



Gneiss. 



Characteristic fossils, etc. 



(o) Characterized by Eschara digitata, J\Ion- 

 tivttltia (.inthofhyUum) atlanticmn, J\'ucleo- 

 lites crvcifer, Jlnanclnjte^cincttis, ^.fmbria- 

 tus, Morton. 



(6) Among the characteristic fossils of this bed 

 are Gryphcea vomer, G. convexa, and Tere- 

 bratida Harlani. 



(c) Cucullea vulgaris is the most chsiracterislic 

 fossil of the lower division. 



Excgyra costata, Ostrea larva, Bellemnitella 

 mitcronata, Pecten (J^eithea) quiiiquecostatus ? 

 and many other fossils, mostly in the con- 

 dition of casts of the interior, or impres- 

 sions of the exterior. 



Exogyra costata, Orstrea larva, Bellemnitella 

 niHcronata, Terebratula Suyi, (.Grypluea con- 

 vexa and G . mutabilis) Ostrea vesicvlaris. 



Ammonites Dclawarensis, •Ammonites placenta, 

 t^.conradi,Bacxditesovatus,C3.sts of Cardium. 



This bed contains large quantities of fossil 

 wood, (no animal remains are known to 

 occur in it.) 



This bed contains fossil wood and numerous 

 impressions of leaves, but no animal re- 

 mains. 



In Alabama, according to the report of Professor Tuomey, the cretaceous strata admit of a 



• This section has been communicated to me by Professor George H. Cook, of the New .Terfey Geological Survey, and gives 

 some additional information beyond that already published in his Geological Report. 



