GEOLOGY OF HAMILTON, WARREN AND WASHINGTON COUNTIES 145 



Series 2. The crystalline limestones and their associates are 

 represented in two areas, respectively northeast and east of the 

 village of Wells. The former yielded specimen 167, and is ian 

 extremely impure variety. The rock is so charged with pyroxene, 

 quartz, feldspar and graphite as to have but a comparatively 

 small amount of calcite. No. 222, from the latter locality, is very 

 richly speckled with pyroxene, but some streaks of fairly pure, 

 coarsely crystalline marble were recorded. Pegmatite, however, 

 and quartz were associated with it. Both these small outcrops 

 were inclosed in gneisses and ran parallel to the foliation. 



Series 3. A single gabbro intrusion has been observed at 221, 

 due east of Wells village. The gabbro is of the usual basic type 

 iound in the Adirondacks, and is faintly foliated from pressure. 

 Boulders in the drift suggested the possibility of the presence of 

 anorthosite in the northeastern part of the town, over toward the 

 tnown areas of this rock in Johnsburg, west of Thirteenth lake. 

 None were however observed in place, and this section is not very 

 accessible. 



Series 4. The small remnant of paleozoic strata near Wells 

 furnishes the special point of interest in the local geology. The 

 remnant presents the most complete section of any of the paleo- 

 zoic outliers in the midst of the crystalline rocks. Several of 

 these are now known, viz, near North Kiver, Warren co.; 

 near Putnam pond, Ticonderoga, Essex co.; Trout brook, near 

 Lake George, Ticonderoga 1 ; North Hudson, Essex co.; several 

 in Crownpoint, Essex co.; and Schroon Lake postoffice, Schroon, 

 Essex co. The last named is Calciferous, all the rest are Pots- 

 dam. There is excellent reason to think that another exists near 

 Elizabethtown, Essex co., but only loose slabs of Potsdam have 

 as yet been found. At Wells the Utica, Trenton, Calciferous and 

 Potsdam beds have all been recognized, but the Chazy fails as is 

 usual toward the south side of the mountains. The four strata 

 present are each of very limited extent. The nearest outcrop of 



1 For a review of those in Ticonderoga, see Kemp, J. F. Physiography of the 

 Eastern Adirondacks in the Cambrian and Ordovician periods. Bui. geol. soc. 

 Amer. 8:408. See also 15th an. rep't N. Y. state geologist. 1895. p. 596. The 

 North River, North Hudson and Elizabethtown cases have not yet been described 

 in print. 



