Pleii^tocene Shell in Furnessville Blowout 



123 



GONIOBASIS LIVESCENS MENKE, A PLEISTOCENE 



SHELL IN FURNESSVILLE BLOWOUT, DUNES OF 



PORTER COUNTY. 



Marcus Ward Lyon, Jr., South Bend. 



On the flcor of the Furnessville Blowout' is a comparatively large 

 bed of small, white, and somewhat weather-worn univalve shells. Closely 

 associated with them are flat, rounded, water-worn small stones like 

 those that are so frequently found at the low water edge of the lake. 



•%>» 





Fiu'. I. G:jniul>a>>iii livcsfcun on the floor of Furnessville Blowout. The small white 

 objects in the foreground are the shells. In the distance are some low f(jro dunes just 

 beyond which is Lake Michigan. 



In 1921 a small handful of these shells was picked up and sent to Dr. 

 Paul Bartsch of the United States National Museum. They were identi- 

 fied as Goriiobasis livescens Menke of Pleistocene Age. Dr. Bartsch 

 suggested that the place where they are found possibly represents an 

 old shore line. With reference to the present shore line and level of 

 Lake Michigan this open bed of shells is found about 150 yards south 

 of the present shore and about 15 feet above the present level of the 

 lake. (Fig. 1.) It lies immediately back of a line of low fore dunes. 



^ On the shore of Lake Michigan, opposite Furnessville station of the Chicago, Lake 

 Shore and South Bend Railway. 



"Proc. 38th Meeting, 1922 (192.3)." 



