220 



Composition. — In 100 parts : 



Carbonate of lime, - - 75-56 



Carbonate of magnesia, - 1*20 



Alumina and oxide of iron, 2-50 



Insoluble matter, - - 18-49 



Water, ... - 2-00 



99-75 



Salem Creek east of Woodstown. — To the southeast of Woods- 

 town, upon Salem creek, the limestone is visible in two or three 

 places, though rather deeply covered by diluvial sand. I cannot 

 learn that it has attracted attention or been burned for lime. It 

 seems to be of very local extent, though possibly the main portion 

 of the stratum has not yet been exposed. 



Near Mullica Hill. — The limestone is found on the small tri- 

 butaries of Raccoon creek, at two places about a mile and a half 

 southwest of Mullica Hill. Though not as highly calcareous as 

 that near Mannington Hill, it effervesces actively with an acid, 

 and contains a moderate proportion of shells, in a fragmentary 

 condition. It occurs in flat thin layers, separated by more or less 

 of the calcareous sand. Its total thickness has not been ascer- 

 tained, the stratum having been quarried to a very limited extent 

 for the purpose of procuring lime. By selecting the more compact 

 and crystalline portions of this rock, and observing proper pre- 

 cautions in the burning, it affords a very good lime, for agricultural 

 purposes. This material is exposed in the banks of a meadow 

 on Raccoon creek, on the farm of Charles Batten, where it shows 

 the following beds : 



1. Dark micaceous earth, thickness variable. 



2. Similar bed, abounding in fragments of white fri- 



able shells, 1 ft. 6 in. 



3. Soft, porous, fossiliferous limestone, - - 4 



4. Calcareous sand, with shells, - - - 10 



5. Gray, compact, subcrystalline limestone, - 10 



6. Calcareous sand, ----- 2 6 



7. Hard subcrystalline limestone only penetrated to 



the depth of eight inches, it is probably con- 

 siderably thicker, 8 



The more compact bands of the limestone afford a very good lime. 



