coos AND ESSEX DISTRICT. 



85 



495- 

 496, 



497, 

 498, 



499> 

 500, 

 SOI, 



502, 



503. 

 504, 

 507. 

 511- 



512, 



5i3> 



514, 

 520, 

 527, 



528, 

 529. 

 530, 

 531, 

 533. 

 542, 

 543. 

 551. 

 558. 

 566, 



SZ7, 

 539. 



548, 

 549. 

 553. 

 562, 

 567, 

 571. 



506, Coarse granite. 



Dark gray gneiss. 



505, 519, 522, Gneiss. 



Gneiss witli epidote. 



Ouartzite. 



Pyritiferous mica scliist. 



Pyritiferous schist with hornblende. 



iVlicaceous gneiss. 



Mica schist. 



Granitic gneiss. 



508, 509, 526, Felsite. 



523, 524, Granite. 



518, Common gneiss. 



Hornblende schist with veins of cal- 



cite. 



Coarse gneiss. 



Quartz with pyrite. 



"Trap." 



HURONIAN GROUP. 



532, Hornblende schist. 



Drab siliceous schist. 



535, Gneiss. 



534' Sl>^^ Gray siliceous schist. 



Mica schist. 



Mica schist rich in quartz. 



544, 545, Dark quartzite. 



Dark micaceous quartzite. 



Feldspathic epidotic schist. 



Quartzite — argillaceous. 



INTRUSIVE ROCKS. 



538, Granite. 



540, 541, 546, 549, 550, 552, 554, 555, 



556, 557. 559. 560, 561, 562, 563. 564, 



565, 568, 569, 570, 578, 579, 580, 581, 



583, Porphyrite. 



Breccia. 



Felsite. 



Labradorite. 



Felsite porphyry. 



Granite — a veinstone. 



Schist with porphyrite. 



HURONIAN GROUP. 



572, 573. 577. Quartzite. 



574, 612, 625, Feldspathic siliceous schist. 



575, Dark feldspathic schist. 



576, Feldspathic schist. 



582, Feldspathic quartz-schist. 



584, Dark, variegated quartz-schist. 



585, Dark gray siliceous mica schist. 



586, Gneiss. 



587, Mica schist. 



588, Chloritic feldspathic gneiss. 



589, Argillaceous mica schist. 



590, 593, 597, 600, Chloritic feldspathic 

 schist. 



591, 611, 615, 616, 620, 621, 622, Chloritic 

 schist. 



592, 617, Hornblende schist. 



594, Sandstone-schist. 



595, Chloritic sandstone-schist. 



598, Micaceous feldsiDathic schist. 



599, 601, 624, Magnesian chloritic schist. 



604, Feldspathic sandstone-schist. 



605, Siliceous limestone. 



606, 608, Siliceous schist. 



607, Greenish siliceous schist. 

 609, Green chloritic schist. 



613, Epidosite. 



614, Chloritic schist with epidosite. 



618, Chloritic quartz-schist. 



619, "Trap." 



623, Chloritic schist. 



626, Gneissic schist. 



MONTALBAN GROUP. 



627, 628, 629, 630, 633, 644, 671, 673, 



Gneissic mica schist. 

 631, 632, 637, 640, 643, 646, 647, 666, 



Granitic gneiss. 

 635, 636, Fine-grained gneiss. 



638, Gneissic schist. 



639, Gray gneissic schist. 



641, 648, 658, 659, 660, 665, 667, Gneiss. 



