1892.] PROSSER — THE GENESEE SECTION. 75 



NO. OF DESCRIPTION OF 



SAMPLE. DEPTH. SA.MPLE. 



2 1. 1050'. Light gray, calcareous shale, effervesces 

 slightly in HCl. There is another box 

 marked " 1050' limestone," which has very 

 fine chips of dark gray color, with strong 

 effervescence. Similar to a limestone. 



22. 1 100'. Very light to darkish gray, strongly cal- 



careous chips. Fragments of fossils. 



23. 1150', Dark gray, argillaceous shale, quite calca- 



reous with slight brownish streak. 



24. 1200'. Dark to bluish gray shale. Streak slightly 



brownish, quite calcareous, fragment of 

 a fossil shell, (?) Spirifera iniicronata (Con.) 

 Billings. 



25. 1250'. About the same as No. 24. 



26. 1300'. Dark gray argillaceous shale. 



27- 1350- Nearly black, argillaceous shale which is 

 slightly arenaceous. Streak slightly 

 brownish ; somewhat calcareous. Hamilton. 



28. 1400'. Black, argillaceous shale, with dark brown 



streak and non-calcareous. Drillers log 



"black shale 45'." Marcellus. 



29. 1450'. Dark and light gray, fine chips, which are 



strongly calcareous. Some of the black 

 Marcellus. Drillers " sand rock ; Corni- 

 ferous limestone." 



30. 1500'. Lightgray limestone ; very finely powdered, 



strong effervescence. Drillers "hard 

 sandy limestone." 



31. 1550'. Ditto. 



32. 1590'. Ditto. Drillers log " bottom of hard sandy Upper 



limestone, thickness 140'." Helderberg- 



T^T^. 1700'. Dark gray limestone with very fine chips. 

 Effervescence not strong at first in cold 

 HCl, but gradually increases. One of the 

 somewhat magnesian limestones of the 

 Onondaga Salt group. 



34- 1753'. Ditto. 



