Maryland Geological Survey 135 



Vertical Total 

 thickness vertical 

 feet thickness 



Thin-bedded gray limestone Tentaculites gyracanthus in 

 abundance 213.5, 216.7, 217, 218.1, 219.5, Uncinulus keyserensis 

 213.5, 214 (a), 216.7, 217, 217.8, 218.1, Meristella prwnuntia 212.7, 

 214 (a), 214.7 (a), 216.7 (a), 217, Schuchertella prolifica 213.5, 

 217 10.6 223.1 



Heavy-bedded, dark blue limestone, bottom foot argillaceous. 

 Uncinulus keyserensis occurs throughout, more abundantly, 

 however, at 189.8, 195.2. Meristella prwnuntia throughout the 

 unit; Uncinulus nucleolatus 211.2; Rensselwria nvutahilis 195.2; 

 Bryozoa 193.6 25.7 212.5 



Massive bed of dark blue limestone spotted with crinoids and 

 corals preserved in calcite. Favosites helderbergiw var. prace- 

 dens (a). Cyathophyllum marylandicum (a), Tentaculites 

 gyracanthus, Beachia proavita, Meristella prwnuntia. Uncinulus 

 keyserensis 186.4. Uncinulus nucleolatus 171.2, 182.2, 184.2; 

 Meristella prwnuntia 182.2 16.6 186.8 



Heavy-bedded, dark blue limestone, gray and crystalline 

 toward the top. Crinoid fragments, Merista typa and Uncinulus 

 keyserensis 169.2 26.0 170.2 



Dark blue limestone heavy-bedded below, becoming thin- 

 bedded toward top. Atrypa reticularis, Chonetes jerseyensis, 

 Rhynchospira formosa 140 9.0 144.2 



A solid heavy bed of blue limestone. Gypidula coeymanensis 

 var. prognostica throughout 2.0 135.2 



Heavy-bedded, dark blue limestone containing Camarocrinus 

 stellatus (a), Tentaculites gyracanthus, Trimerocystis peculi- 

 aris, and Calymene camerata 5.6 133.2 



Thin, irregularly bedded, dark blue limestone. At the top of 

 this unit occurs Spirifer modestus 6.0 127.6 



Thin, irregularly bedded, dark blue limestone. Seven feet 

 below top of this unit were found Stenochisma formosa ?, 

 Schuchertella deckerensis, Uncinulus convexorus, Platyostoma 

 sp 13.6 121.6 



Heavy-bedded blue limestone. Atrypa reticularis, Schucher- 

 tella deckerensis, crinoids. Between 100 to 133 feet vertically a 

 profusion of cystids is found including Sphwrocystitis multifas- 

 ciatus (aa), 8. glohularis (a), Pseudocrinites gordoni (a), 

 Jwkelocystis hartleyi (a), Pseudocrinites stellatus, P. clarki, P. 

 perdevn, Jwkelocystis papillatus, J. avellana, Lepocrinites man- 

 lius, Tetracystis chrysalis. At bottom occur Atrypa reticularis, 

 Schuchertella deckerensis. Uncinulus convexorus, Platyostoma 

 sp 18.0 108.0 



Heavy-bedded dark blue limestone. Camarotoechia sp., Spiri- 

 fer sp., Atrypa reticularis (a), Tentaculites gyracanthus, Fe- 

 nestella cwmherlandica 80. Lioclema subramosum, Batostomella 



