250 ft. Pumpelly—Paragenesis of Copper 
27. SAME BED.—1, Prehnite, penetrated with copper 
thirenddés-3, Quartz in prisms—8, Chlorite-like mineral men- 
tioned in Nos. 20 and 21; here also it has eaten into the faces 
of the quartz crystals—4, Analcite crystals, much fractured 
and eaten ste and sometimes quite hollow. 
N AME BED.—1l, Prehnite in places cavernous—2, 
Quartz in prisms in the cavities in me altered prehnite—d, 
Orthoclase crystals pienier on the quart 
No. 29. Same —1, Prehn ite9, Copper traversing 
the prehnite in ‘the en of threads, ete. , ending in crystals 
— wart themselves to the crystalline surface of the prehnite. 
AME BED.—1, Prehnite—2, Analcite—8, Copper, 
in flakes 0 on the analeite—4, Orthoclase ; oes like muneral. 
No. 31. Same BED. ad, Quartz in prisms—2, Orthoclase 
age pees on the quartz, 
No, 82. SAME BED.—1, Prehnite—2, Copper in crystals 
whose a surfaces are moulded : the crystalline surface of 
ak Caper ee 
o. 83. Huron Minze.—On the amygdaloid containing 
smaller solsertules of delessite and quartz, lie :—1, Laumontite, 
a crystalline layer with projecting crystals—2, Calcite orysial- 
ized upon and wholly enveloping the laumontite crystals. 
No. ESTERNMOST ADIT ON THE “SourustpE.” 1. Anal- 
cue, in opaque.crystals 4to4inch in diameter. 2. Orthoc 
crystals planted on the analcite. (The rock containing this is 
chocolate-brown, and filled with small amygdules of Ist Lav 
montite, 2d L Calcite). 
No. 85. “Ragcep Awyepator.” Sr. Mary’s. This is @ 
soft brown amygdaloid with brown streak, in which the cavities 
have assumed the most irregular sha ‘and merge into eac 
ober in @ manner which gives to the rock a highly brecciated 
ap nee. The cavities are generally partially open at their 
wider points ; and the minerals occupying them are chit} the 
following, often sonneee by a fs clay. On the rock 
lie, 1. Analcite. 2. Orthoclase crystals on the analcite. 8. Cal 
cite over both the foregoing members. 
On the 
No. 36. Same ie rock lies Calcite. Orthoclase 
— on the saleiee 
7. SAME BED. On the ou are scattered, 1. Analcile 
No. 38. SAME BED. 1. pam in large crystals; much 
altered. 2. Orthoclase crystals planted apn thes outer surface 
of, and in cavities in, the analcite. 
0. 39. PEwaBic CoppEr- ee BED. On the amyete 
loidal rock sao re 1, Calcite; copper. 2. Datolite in a granular 
mass incrusting the calcite crystals, 
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