166 The Lower Devoxiax Deposits of Maryland 



Horizontal Vertical Total 

 distance thickness vertical 

 feet feet tliiclsness 



Dark grayish-blue thin-bedded limestone weathering 

 gray 137.5 15.9 85.8 



Arenaceous gray crinoidallimestone. Crinoids (aa), 

 Atrypa reticularis 113.5 11.2 69.9 



Stromatopora bed with corals 96.5 3.5 58.7 



The remaining portion of the section comes from 

 the Lower Quarry zone, beginning at the bottom of 

 the Stromatopora bed exposed in the upper part of the 

 quarry on the road leading north from Hancock. 



Direction N. 20° E. 



Thin-bedded shaly limestone becoming more are- 

 naceous toward the bottom. Meristella sp. at the 

 bottom 93.0 7.5 55.2 



Heavy-bedded dark blue limestone containing num- 

 erous calcite stringers. Quarried 77.0 11.8 47.7 



Direction due West 



Thick-bedded dark blue arenaceous limestone 52.0 4.1 35.9 



Thin-bedded dark blue arenaceous limestone. Leper- 

 ditia cf. alta 46.0 18.0 31.8 



Thin-bedded dark blue arenaceous limestone, largely 

 made up of crinoid stems 20.0 6.9 13.8 



Thin-bedded gray-blue somewhat nodular limestone. 

 Meristella sp., Dalmanella sp 10.0 6.9 6.9 



Thickness of Keyser member exposed 104.2 



ToxoLowAY Formation 

 Blue limestone becoming thin-bedded upon weather- 

 ing 6.0 



Thin calcareous shale. 



The Keyser member is exposed at various places east of Hancock, but 

 the sections have not been studied in detail. 



sections of COEYMANS, new SCOTLAND, AND BECRAFT MEMBERS 



The following sections display the characteristics of the Coeymans, New 

 Scotland, and Bccraft members more fully and will aid the student who 

 desires further acquaintance with the subject. The sections will be 



' Contributed by C. Schuchert, C. K. Swartz, and R. B. Rowe. 



