Table 5. Sand-size fractions (percent) from various locations on Padre and Mustang Islands. 



Area 



Depth 

 (inches) 



Coarse 1 

 > 0.50 mm 



Medium 

 > 0.25 mm 



Fine 

 > 0.10 mm 



Very fine 

 > 0.05 mm 



1969 Samples 



North Padre 



Surface 

 12 



l.l 1 



19.7 

 38.4 



77.9 

 59.8 



1.1 

 1.7 



Nursery 







0.8 



97.2 



1.9 



South Padre 



Surface 



(windblown) 



Surface 



12 



Surface 



6 



12 



26 



0.9 

 14.9 



8.7 



1.3 



15.9 

 0.9 

 3.6 

 3.9 



11.9 



90.2 



95.4 

 83.5 

 96.4 

 94.7 

 93.7 

 71.4 



0.4 



3.2 

 0.4 

 2.5 

 1.6 

 1.3 

 1.6 



1970 Samples 



Mustang 











foredune 





1.7 



96.3 



1.9 



interdune 





1.5 



96.3 



2.2 



hind dune 





1.6 



96.4 



2.0 



North Padre 











foredune 





0.3 



97.7 



1.9 



interdune 





1.0 



97.1 



1.9 



hind dune 





0.1 



98.6 



1.3 



Seashore 











foredune 





0.5 



98.2 



1.3 



interdune 





1.4 



96.4 



2.2 



hind dune 





0.6 



97.5 



1.9 



Twin Batteries, 











1 ,200-foot sea oats 





0.9 



97.8 



1.3 



(Using U.S.D.A. Size Standards) 

 1. Coarse sand was mostly shell particles. In 1970, these particles never exceeded a trace and were not 

 measured. Particles less than 0.05 mm belong in the silt and clay fractions and never exceeded a 

 trace; although measured, the values are omitted. 



33 



