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Transactions Texas Academy of Science. 
[ 122 ] 
marl between the two. In certain localities large areas occur, composed 
entirely of this marl, and there is no evidence that the Austin chalk 
once lay above it. It seems to be a separate and distinct formation for 
the following reasons : 
(1) It has characteristic fossils which are not found in the Austin 
chalk, and 
(2) It differs stratigraphically from the Austin chalk. I think this 
marl should be given a distinct name, and I propose the name of “South 
Bosque Marl,” on account of the fine exposures found around South 
Bosque Station, McLennan county, Texas. 
i 
