SECTIONS IN THE BLACKWATER RIVER VALLEY. 151 



VII. Section right haul- of Blacl'icater River, seven and one-half miles {by 



water) south of Zuni. 



Feet 

 Pleistocene Yellow sand 6 



Miocene. St. Marv's Yellow (weathered) to blue ( unweathered ) 



sandy marl carrying numerous specimens of 



Mulinia congcsta 3 



]51uish sandy marl, somewhat glauconitic, and 

 highly fossiliferous, containing Crcpidula 

 aculeata var. costata, Crucibulum grande, 

 Polynices heros, Turritella variabilis, Area 

 centenaria, A. incile, Astarte undulata, Glycy- 

 meris subovata, Margaritaria abrupta, Ostrca 

 compressirostra, 0. sculpturata , Panopea 

 reflexa, Picien clintonius, P. eboreus, P. jef- 

 fersonius, P. jeffersonius var. septenarius, 

 Vcnericardia (irnnuJitln 5 



Total 14 



VIII. Section right hanl- of Bkirl-ivater I?iver, eight and one-half miles 



{by water) below Zuni. 



The bluff at this point is one of the highest along the Blaekwater River. 



Feet 

 Pleistocene Ycllowisli Kind about 13 



Pliocene. St. Mary's Yellowisli weathered sandy marl, fossiliferous. 



containing Area incile, Glyeymeris subovata, 

 Mulinia coiigeslci, Ostrea eompressirostra, 

 O. sculpturata, Peeten jeffersonius, P. jef- 

 fersonius var. edgecombensis, Venus rileyi.. 20 

 Concealed, probably blue marl 12 



Total 45 



IX. Section left banl- of BlarJriraicr River about three miles {by ivater} 



soutJi of Burdette. 



Feet 

 Pleistocene Yellowisli sand 12 



Miocene. St. Mary's Light blue compact sandy clay weathering to 



yellow and containing impressions of shells 

 similar to those occurring in upper part of 

 marl beds elsewhere in this region 12-15 



Total 27 



A similar section was ol)serYed abont 1^/2 to 2 miles (by land) north of 

 Franklin. 



