coos AND ESSEX DISTRICT. 



8i 



Catalogue of Specimens,* 



Chiejiy from Coos County^ as arranged in the State jSIusemn at the Agri- 

 cultural College. Plate V, which is a photo-lithograph fro7n the 

 county map^ shows where each specimen %vas obtained. 



77, Quartzose gneiss. 



78, Fine-grained gneiss. 



79, Gneiss rich in quartz. 



81, Chloritic scliist, with nodules of epi- 

 dote. 



80, Greenish schist, with gneiss interstrati- 

 fied. 



82, 83, 90, 91, 96, 98, Chloritic schist. 

 86, Diorite. 



117, Grayish diorite-schist. 



118, Argillaceous schist. 



HURONIAN GROUP. 



1, 16, 38, 39, 44, 84, 85, 87, 93, 94, 99, 



1x6, Arenaceous sandstone-schist. 



2, 6, 8, 9, 19, 40, 64, Greenish siliceous 



schist. 



3, 14, 45, 97, Argillaceous mica schist. 



4, 5, Serpentine. 

 7, Mica schist, with irregular texture and 



quartz veins containing pyrite. 

 10, II, 12, 13, Argillaceous schist. 

 15, Banded arenaceous sandstone-schist. 



17, Light gray siliceous schist. 



18, 26, 28, Gray argillaceous mica schist. 



21, Gray argillaceous slate. 



22, Very fine-grained gneiss. 



23, Gneissic schist. 



24, Fine-grained diorite-schist. 



25, 30, Light gray argillaceous schist. 

 27, Argillaceous sandstone. 



29, 43, 65, 92, 105, 119, Gray argillaceous 

 schist. 



31, Grayish-green diorite-schist. 



32, 32, 7S, 76, Clay slate. 



34, 35, Gray siliceous schist — Novaculite. 

 36, 89, 95, 100, Porphyritic diorite. 



41, Greenish chloritic schist. 



42, Argillaceous schist. 



66, Quartzose mica schist. 



67, Siliceous feldspathic schist. 



68, Gray mottled siliceous schist. 



69, Steel-gray siliceous schist. 



70, Argillaceous sandstone-schist. 



71, 7-7 Ji', 74. Greenish-gray siliceous 

 schist. 



coos GROUP. 



46, Arenaceous clay slate. 



47, 48, 51, 53, 54, 56, 61, 62, 103, 104, 106, 



107, 112, Argillaceous schist. 

 49, Argillaceous mica schist with pyrite. 

 5°» 55' 97' 109. no, III, Argillaceous mica 



schist. 

 52, 63, Ochrey argillaceous schist. 



57, 59, Ochrey argillaceous mica schist. 



58, loi, 102, 113, Calciferous mica schist. 

 60, Argillaceous schist — wrinkled. 



115, Argillaceous schist — much contorted. 



coos GROUP. 



120, Ochrey argillaceous schist. 



121, Quartz — a veinstone. 



122, Argillaceous mica schist. 



123, 128, Clay slate. 



124, 125, Calciferous mica schist. 

 127, Calciferous slate. 



129, Argillaceous schist. 



130, Quartz, a veinstone with sphalerite 

 and galenite. 



* For the nomenclature we have used the reader is referred particularly to Rocks Classified and Described 

 B. Von Gotta, English ed., P. H. Lawrence, and the Geology 0/ Michigan, vol. ii, 1873. 

 VOL. II. II 



