RAYMOND: CORRELATION OF THE ORDOVICIAN STRAIA. 277 



1. Yellow and white sandstone with numerous Obolus, 



one layer. 2 ft. 3 in. = 2 ft. 3 in. 



Zones 1-5 represent the Packerort formation. 

 Concealed to water-level. 



Ontika. (Top 206 ft. above sea-level. Measured by Dr. Twen- 

 hofel and the writer). 



11. Thin-bedded soft limestone with Echinosphaerites aurantium. 



5 ft. = 78 ft. 5 in. 

 10. Thin-bedded light gray limestone with numerous 



Orthoceratites and many small "linsen." Upper 



Linsenschicht. - 7 ft. 6 in. = 73 ft. 5 in. 



Zones 10 and 11 represent the Dubowiki formation. 

 9. Thin-bedded light gray shaly limestone with numerous 



Orthoceratites. A nine inch shaly parting is present 



four ft. above the base. 18 ft. 6 in. = 65 ft. 11 in. 



8. Lower Linsenschicht. 8 in. = 47 ft. 5 in. 



Zones 8 and 9 represent the Kunda formation. 

 7. Heavy-bedded gray limestone with nine inches of shale 



at top. ' 5 ft. = 46 ft. 9 in. 



6. Thin-bedded nodular and shaly limestone 6 in. = 41 ft. 9 in. 



5. Heavy-bedded reddish limestone with green patches, 

 weathering yellowish. 4 ft. 9 in. = 41 ft. 3 in. 



4. Green sandy shale. 4 ft. = 36 ft. 6 in. 



Zones 4 to 7 represent the Waichow formation. 

 3. Hard red limonite layer. 3 in. = 32 ft. 6 in. 



2. Black shale, no fossils seen. 7 ft. 3 in. = 32 ft. 3 in. 



1. Cross-bedded reddish and white sandstone which dis- 

 integrates to loose sand. Base not seen. 25 ft. = 25 ft. 

 Zones 1 to 3 represent the Packerort formation. 



Concealed to water, 127 ft. 



Catherine Park, Reval. (Measured by the writer). 



7 Thin-bedded often shaly limestone. The highest layers 

 in the quarries. Echinosphaerites and other cystids 

 common. Kuckers formation. 4 ft. = 47 ft. 



6. Light gray compact fine-grained limestone in beds 8 to 



15 inches in thickness. Fossils are very rare. Certain 

 layers contain vertical, tube-like fillings suggesting 

 borings.- Largely quarried. 28 ft. = 43 ft. 



