456 The IJprER Devoxiax Deposits of Maryland 



2 j) o"S §■> So 



N (U-- 



■?2 



3 =< O 



■r o c - 01 o .t; •" o) 



Ig-P^ 



Fissile red shale 1809 11 1316 ^ 



Olive-green shale containing thin beds of green sand- I 



stone. Shale rusty 1794 69 1305 



Olive-green shale of varied physical character 1699 72.7 1236 



Hackly green shale and a few thin beds of brown shale 

 containing the following fossils at top: Cyrtina hamilt07i- 

 ensis abundant, JAorhynchus globuliforme, Productella 

 speciosa abundant, Fugnax pugnus var. altus abundant, 

 Spirifer mucronatus var. posterns 1599 69.1 1163 



N. 20° W. 50° E. 



Brown shale and sandstone 1504 13.5 1094 



Hackly green shale containing at top N. 15° E. 40° E. 

 Liorhynchus globuliforvie, Productella speciosa abundant, 

 Pugnax pugnus var. altus, Schizophoria sti'iatula, Spirifer 

 mucronatus var. posterns, crinoid rings 1482 6 1080 



Green shale breaking irregularly containing Productella 

 speciosa common and Spirifer mucronatus var. posterus, 

 Pala'oneilo brevis ? 1472 10.5 1074 



Green hackly arenaceous shale, containing Productella 

 speciosa abundant at top. N. 15° E. 40° E 1455 6 1064 



Green hackly shale and thin beds of fine-grained green 

 sandstone. At top occur Pugnax pugnus var. altus, Lin- 

 gula spatulata, Liorhynchus globuliforme, Schizophoria 

 striatula, Productella speciosa, Spirifer viucronatus var. 

 posterus. N. 25° E. 60° E 1445 47.5 1058 



Green shale, very fissile at bottom, becoming gradually 

 more hackly above, containing Spirifer mucronatus var. 

 posterus at top 1390 185 1010 



Road N. 80° W. 



Green shale of varied character containing Cladochonus 

 humilis abundant at top 1120 39 825 



Hackly green shale, one bed chocolate-colored, con- 

 taining the following fossils at top of unit: Atrypa reticu- 

 laris, Schizophoria striatula common 1065 14.1 786 



Arenaceous green shale breaking irregularly 1045 17.5 772 



Green shale breaking irregularly containing the follow- 

 ing fossils at the top: Cladochonus humilis, Atrypa reticu- 

 laris, Productella speciosa, Reticularia Iwvis, Spirifer 

 mucronatus var. posterus 1020 10.5 755 



