59 

 Red Sand 



Description 



The red sands are coarse and subangular with a characteri- 

 stic red stain on the grains similar to that on the fragments 

 of some present day dune or beach sands. The mineralogy of 

 the red sand is similar to that of the rock -fragment sand and 

 the range of heavy mineral percentages is from 1.3 to 8.87o. 



The red sands nearshore south of Redondo Canyon are 

 different in appearance from those north of the canyon. The 

 former characteristically have a brown color sind a considerable 

 amount of shell fragments. In the northern portion of the 

 bay, a reddish color is more apparent and shell material is 

 generally minor in amount. Shell fragments occurring in both 

 areas show some signs of wear and the rounding of all frag- 

 ments ranges from .20 to .40, The sphericity coefficient 

 ranges from .70 to .80. 



Occurrence 



Red sand in the northern portion of the bay is always 

 associated with rock fragment sand where it occurs as small 

 isolated patches. It is nearshore in all cases except for 

 one occurrence where red-stained minerals were recovered 

 from the offshore deposit of rock-fragment sand. 



South of Redondo Camyon the red sand occurs in a large 

 linear deposit which parallels the shoreline and lies close to 

 shore. 



