Mulgan. — The Waitemata Series. 



425 



again appear in a band about 12 ft. in thickness, and can be 

 traced northwards for a few hundred yards. Between the 

 exposures of grit just described and those at the Eed Bluff the 

 sedimentary strata are considerably disturbed and faulted, 

 so much so that it is almost impossible to establish any satis- 

 factory connection between them. It is a noteworthy fact, 

 however, that nowhere do these volcanic ash-beds show more 

 than one. outcrop — i.e., nowhere do they outcrop as a number 

 of bands distinctly separated by sedimentary strata. 



At the Eed Bluff the grits become coarser, in some places 

 passing into conglomerates, with fragments, slightly water- 

 worn, 2 in. to 4 in. in diameter. The coarser texture of the 

 beds in this neighbourhood would seem to indicate greater 

 proximity to the old seat of activity. Scattered through the 

 beds are large volcanic blocks corresponding in size, texture, 

 and composition to those previously described ; and, as in the 

 case of similar exposures elsewhere, these ash-beds lie con- 

 formably between the Waitemata sandstones and shales. 

 Here, however, the direction of dip is north-east, and the 

 angle at which the beds are inclined approximately 30°. 



Fig. 6. 



fin 'id'.iA i, ', '/, i kin, <j-iJm> n. *. p 



Section through AB. 



Plan and section showing connection between outcrops of volcanic grit at 

 the Red Bluff : 1. Bands of volcanic grit. 2. Sandstones and shales. 

 C, D, E, F. Four outcrops of grit. 



Sketch showing four outcrops of grit at C, D, E, and F, as actually seen 

 on the ground. 



