Maryland Geological Survey 55 



queiit chapter. Minor folding makes the Onondaga member appear 

 thicker than it is/ 



The section begins at the Eomney-Oriskany contact at the foot of 

 Nicholas Mountain, east of Mt. Hermon Chnrch. and extends westward 

 on the old Williams Eoad. 



ROMNEY P'oliMATION 



Hamilton Member ^^^^ ,^^^^^1 

 No. 10. Soft drab shale weathering to small many-sided frag- 

 ments 2r30+ 1097 



No. 9. Gray sandstone with Hamilton fossils Tropidoleptus 



carinatus, etc 35 847 



No. 8. Drab shale weathering in lumpy fragments 150 812 



Marcellus Member 

 No. 7. Black to drab fissile clay shale grading into next division. 360 662 

 No. 6. Road leading north, drab or buff blocky shale, a con- 

 cretionary limestone 9 inches thick is found just below top of this 

 unit. The shale contains: Strophalosia truncata (c), Liorhyn- 

 chus Umitare (c), Liorhynchus cf. mysia (a), Buchiola retrostriata 



(r) 45 302 



No. 5. Fissile black shale. St yliolina flssureUa Sibundant 100 257 



Thickness, Marcellus member 505 



Onondaga Member 



No. 4. Green and drab shale. Repetition of bed No. 2 in part. .. . 102 157 



No. 3. Fissile black shale weathering gray. Repetition of bed at 

 base of Onondaga. Pholidops cf. areolata (r), Anoplotheca acuti- 

 plicata large individuals (c), Agoniatites cf. expansus (r) 55 55 



No. 2. Green and drab colored clay shale weathering in one band 

 10 feet thick to reddish. Minor folding. Chonetes mucronatus (a), 

 Chonetes rugosa n. sp. (c), Pholidostrophia pennsylvanica n. sp. 

 (r), Anoplotheca acutiplicata (r), Anoplotheca Camilla (r), Ambo- 

 coelia umbonata (a), Nucleospira cf. concinna (r), Reticularia cf. 

 ftmbriata (r), N^iculites modulatiis n. sp. (r), Paleoneilo cf. con- 

 stricta (r), Liopteria laevis (r), Grammysia sp. (r), Eiithydesma? 

 sp. (r), Modiomorpha subalata (r), Naticopsis sp. (c), Loxonema 

 hamiltonae (r), Euomphalus sp. (r), Ooniatites sp. (r), Bactrites 

 aciculus (c), Bollia ungula (c), Bollia obesa (r) 160 



No. 1. Lead gray to black clay shale. Orbiculoidea lodiensis 

 var. media, (a), Anoplotheca acutiplicata (a), Bactrites aciculus 

 (c), Enchostoma ? sp 55 



Thickness, Onondaga member 157 



Oriskany-Romney contact 



' The original measurements of the author did not allow for this feature. He 

 is indebted to Dr. C. K. Swartz who first called his attention to this fact, and 

 who has revised his estimates of the thickness of the lower beds. 



