GEOLOGY OF THE WHITE MOUNTAIN DISTRICT. 



249 



734' 735' IVl'' Coarse ossip3te, with biotite. 



Jackson Tin Mine Adit. 

 741, 742, Coarsely crystalline labradorite 

 and hornblende, with few crystals of 

 orthoclase. 

 ANDALUSITE SCHIST GROUP. 

 743. 744' 750. 752, 754. 757. Clay slates. 

 745-748, 75 1 , 753, 756, Micaceous quartzite. 

 749. 755' 761, Andalusite schists. 

 758, 759, Mica schist. 

 760, Banded vein, chiefly calcite in 759. 

 Moosilauke. 



762, Andakisite mica schist. 



763, 764, Micaceous quartzite. 



765, Quartz vein in 763. 

 765 a, Granite. 



PORPHYRY. 

 yackson, Baj'tlett, and Chatham. 



766, 769, 770, Greenish compact feldspar. 

 "](>•], Porphyritic breccia. 



768, Breccia of porphyry, mica schist, and 



quartzite. 

 771, Porphyry. 



Pevtigeivasset. 

 482, 772, 778, 779, Porpliyry. 

 ni, 781-785. 787. 791-793. Porphyries, 



with more or less quartz. 



774, Sandstone, with 772. 



775, 780, 794, 796, 797, Greenish compact 

 feldspar. 



776, 'J']'], 786, Porphyries, with reddish 

 crystalline spots. 



778, Amygdaloidal porphyry. 

 779, Porphyry, passing into Albany granite. 

 790, Light drab compact porphyry. 

 795, Gray porphyry, with bits of dark 



schist. 

 798, 79S a, Red porphyry. 



MT. PEQUAWKET BRECCIA. 

 Pemigewasset. 

 597, 605, 606, Porphyritic breccia. 

 VOL. II. 32 



799, 804, Porphyry, with crystals of quartz 



and orthoclase and fragments of schist 



and porphyry. 

 Soo, Soi, Hornblendic porphyry. 

 802, 803, Porphyry. 



Mt. IVillard. 

 805, Porphyry, with crystals of quartz and 



orthoclase. 

 576, S06-809, Breccias, with fragments of 



slate, porphyry, gneiss, mica schist, 



quartz, and feldspar. 



Mt. Pequawket. 



811, 817, Slate breccia. 



812, 813, 814, Breccia, with porphyritic 

 base holding crystals of quartz and 

 feldspar. 



815, Porphyry, with very little slate. 



816, Porphyry, with large piece dark fel- 

 site. 



818, Fragment of quartz porphyry — 819 of 



trap from 817. 



IVaterville. 

 820-823, Breccia, with minutely crystalline 



feldspathic and micaceous paste. 

 Bartlett and Albany. 

 824, Porphyritic dyke. 

 825-827, Quartz porphyries. 

 828, 829, 831-834, Porphyritic breccia. 

 830, 835, Micaceous quartz porphyry. 



836, Gneiss, (?) with 835. 



837, Porphyritic breccia — red and dark por- 

 phyry fragments. 



838, Red porphyry. 



839, Dark compact porphyry, with diorite 

 fragment and pyrites. 



840-842, Porphyritic breccia — fragments 

 of reddish, gray, dun, and black por- 

 phyries, labradorite, and gneiss. Ce- 

 ment of light gray porphyry holding 

 amorphous quartz and crystals of feld- 

 spar. 



