Pleistocene Snails from San Patricio County, Texas 



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20 CORPUS 

 J 1 CHRIST 



Text-figure 1.— Location of Fordyce Quarry in San Patricio County, Texas. 



concentrated within pockets in this upper unit below the soil horizon. 

 Snails are abundant in the scattered caliche pockets in the silt, and to 

 a lesser degree in the silt itself in the upper unit. Evidence is herein 

 presented for a late Wisconsinan ( post-Bradyan ) age for the upper 

 unit. 



Measured Sections 



Two sections were measured and samples taken in the Fordyce 

 Quarry which is located immediately south-southeast of the intersec- 

 tion of farm road 666 and the railroad tracks at San Patricio. The two 

 sections, located only a score of feet apart, were measured near the 

 quarry office. As is usual with Pleistocene terrigenous sediments, the 

 individual beds are rather erratic in their distribution and are dis- 

 continuous, with individual layers lensing out and replacing one an- 

 other laterally so that the two measured sections show somewhat 





