FIFTH REPORT OF THE DIRECTOR I908 



217 



SOME PARALLEL GROUPINGS OF CALCITE CRYSTALS 

 FROM THE NEW JERSEY TRAP REGION 



BY H. P. WHITLOCK 



i Calcite from Plainfield, N. J. 



The attention of the writer was recently called to some interest- 

 ing parallel groupings of calcite crystals which were collected in 

 1903 by Mr Alfred C. Hawkins of Sewaren, N. J., from a locality 



Fig. i Fig. 2 



about 1 mile west of Plainfield, N. J. The writer wishes to 

 express his thanks to Mr Hawkins for the loan of the three speci- 

 mens which form the basis of this note and for his description of 

 the locality. 



The calcite crystals were collected from a road material quarry 

 situated in the first ridge of the Watchung mountains. They occur 

 in vertical veins in Watchung basalt associated with zeolites. 



