3. About like No. 2 but even darker, more fossils, and containing num- 
erous large fragments of a yellowish, sandy limestone. ..1 ft. 3 in. 
2. More massive than No. 1 and lighter colored. Very hard. Few fos- 
sils, some gastropods separated by rather uneven contact from 
INO Sere irc seis ee cA PCA Cy ORAS. opt np a Lite.6mme 
1. Drab, hard limestone, fine grained, light, weathering to rather thin 
layers. Columnaria abundant throughout. Batostoma varium 
abundant. 
The Trenton in this section lies below the base of the Trenton of the Tren- 
ton Falls gorge, and is known as basal Trenton. The beds are massive, ery- 
stalline and contain light weathering ‘‘pebbles,’’ (Solenopora and Stroma- 
tozerium). The Black river also contains similar pebbles and many angular 
masses of hard, blue, unfossiliferous limestone. The Lowville (Birdseye) is 
either absent or represented by a thin layer only. The Black river contains a 
large branching Batostoma (Batostoma varium) in considerable abundance, 
together with Tetradium and Columnaria. The latter is sometimes in very 
large masses. 
The Strophomena is especially abundant in the massive lower part of the 
Trenton. 
There is a disconformity between Nos. 1 and 2 and between 3 and 4. 
The upper layers of the quarry are thin, very dark colored, with black 
shaly partings. They are very fossiliferous, containing especially Plectambon- 
ites, Mesotrypa and Cryptolithus. Small Bryozoa are abundant. 
The dip of the rock is variable but is generally about two degrees south- 
west. 
The Amsterdam limestone of Cushing includes the massive beds of the 
so-called Trenton and the Black river at this outcrop. The following species 
were collected: 
1: Batostoma? decipiens Ulrich... ....<. ac 2. 4a eae 1 
2), Batostonin: vari “UMP. 2.2.5.5 10.0% oseaceet age er: i 
3 -Bythoporaherricks, (CUuiCh) oc acy: «nah ores woke so Cc 
4. (Gabymene senanan Conrad.....a. c.en0o 2. = eae ec 
je IOhASmMoOvopoOra TeulCulatas (ELAINE, sectors <cps =r ener a 
6s uGolummnaria hall Nicholson... a... oat eee eee c 
He AN OIG + SEO OES sedis a avccste-g bea yete uty ene as eae a 
S.. “Cry ptolithus -tessellatis Green ; ..:2.:. so 223. esa eee c 
