fk. Pumpelly—Paragenesis of Copper, etc. 243 
localities of scratches that have been noted in Maine, the 
scratches in sixty-two have a southeasterly course; that the 
southeasterly course of the glacial grooves and striz is espe- 
cially marked in the interior of the State on the high lands and 
low mountains; but, approaching the coast, the evidence shows 
& more north-and-south course, and at times, owing to local 
trends in the depressions, were even deflected so as to flow in a 
direction a few : ic west of south. The facts in Maine are 
Just such as are general to New England. 
he same principle is recognized by Prof. N. S. Shaler in the 
Proceedings of the Boston Society of Natural History, for 1870. 
Other similar facts have been recently pointed out in States to 
the west of New England. When the applications of the prin- 
. ciple are studied out over the whole continent, we shall under- 
: stand better than we now do the sources of the varied move- 
ments in the great glacier. 
Art. XXXII.— The Paragenesis and Derivation of Copper and 
us associates on Lake Superior ; by RAPHAEL PUMPELLY. 
II. Paragenesis of the Minerals associated with Copper. 
| No. 1. Capen Vern.—This is apparently a true fissure vein. 
: It occurs in a compact and very tough melaphyr, which is 
exceedingly chloritic near the vein. All the joints within a 
distance of several yards from the vein are covered with a coat- 
ing ;'5 to $ inch thick, of dark-green and bluish-green chlorite, 
having a combined fibrous and foliated structure egg bee to the 
Joint surfaces. The melaphyr is rich in magnetite. heet cop- 
Per was found in mining, but not in paying quantity. 
- Laumontite, in thin seams. ; 
2. Prehnite, in seams which cut through those of laumontite , 
also between symmetrically arranged bands of laumontite. 
8. Chlorite, ‘as destroyer and replacer of prehnite, and as 
ng of cavities in the latter. : : 
; 4. Analcite, in clear crystals on the prehnite and chlorite. 
alcite 
: No. 2. Huron Minz.—1. Laumontite, in thin crystalline 
. oa on the sides of a cavity; the free ends of the opposed. 
tystals nearly meet. : 
2. Prehinite filling the space between the bands of laumontite. 
_No. 3.* Copper FaLis Minz.—Fissure vein. 1. (?) Natro- 
- 2. Laumontite. 8. Analcite. : 
No. 4.* Saw vern.—1. Apophyllite. 2. Copper. 8. Orthoclase 
Noy ee from alist given by Hilary Bauerman, Quart. Journ. Geol. Society, 
be 
that the glaciers moved down the river valleys, and thus assumed « 
Fd 
