20(3 



Just south of tlie Weisburg station, in the bank of the creek to the west of 

 the railroad, the upper layers of the Ordovician are exposed. From this ex- 

 posure a large and very satisfactory collection of fossils was obtained. A section 

 at this point is as follows (iJ 1.34 A) : 



Ft. 



15 — A number of feet of barren limestones 



14 — Blue compact fine-grained limestone. No fossils. 



13 — Covered 



12 — Compact limestone. Rhynchotrema capax .• 



11 — Thin-bedded limestone 



10 — Very compact, fine-grained limestone 



9 — Calcareous shale with Strophomena 



8 — Limestone. Fragments of Asaphus 



7— Shale 



6 — Limestone with HeherteUa 



5 — Limestone same as 4 



4 — Blue limestone with Rafine^quina edgewise (a^) 



3 — Rafinesquina flatwise (a) 



2— Shale 



1 — Coarse compact limestone, no fossils 



Total section 



Level of creek below railroad culvert. 



12 



In. 



8 

 7 

 4 



a 



8 



3 



2 



10 



Continuing on down the creek from this point, the following layers are 



passed over (^ 1.34 B): ^ 



Ft. In, 



4 —Limestone .* 8 



3 — Irregular lumpy shale 2 6 



2 — Limestone and shale with Rofineiquina and Heberiella 1 4 



1 — Very coarse-grained limestone. Rhynchotrema (aa) 2 3 



Down stream from this point no measurements were made, owing to the effect 

 of rainy weather upon the barometer, but the characteristic fossils of the success- 

 ive layers were noted. These are as follows from the last mentioned layer down- 

 ward (? 1.34 C): 



16 — Plectarnbonites sericea (a.a.). 

 15 — Strophomena rugosa (aa). 

 14 — Barren shale. 

 13 — Strophomena. 

 12 — Slreptelasma (aa). 

 1 i — HeherteUa ( aa ) . 

 10 - Streptelasma. 

 9 — Leptd'na rhomboidalis (aa). 



