1006 Super-Metamorphism and Vulcanism. (December, 
The scallop fishery is of small moment in the United States be- 
side the production for market of oysters and clams, and the 
statistics (for which I am chiefly responsible) are meager, and not 
later than 1881, though I doubt whether this year’s figures would 
show much difference from the status of five years ago. 
Briefly summarized, these show that about 250 men (and for a 
short season at New Suffolk, Long Island, about 470 women and 
children, according to Fred. Mather), are engaged in either catch- 
ing or preparing scallops, using boats and apparatus worth per- 
haps $20,000. 
The total product is from 70,000 to 75,000 gallons of the edible 
part, as marketed, worth at first hand from $25,000 to $30,000. 
About one-half of this comes from Peconic bay, and more than 
half the remainder from Greenwich, Long Island. . 
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SUPER-METAMORPHISM AND VULCANISM:! 
_ BY THEO. B. COMSTOCK. 
x it be = that metamorphism has converted Archzan sedi- 
mentary strata into the crystalline condition in which those 
beds now usually exist, there can be little doubt that some igne- 
ous rocks have hada similar origin. We can not detect the 
direct evidence of such previous condition in the thoroughly 
` fused masses, but there is in many cases no real proof to the con- 
trary, to say the least, Now, if these simple postulates be admit- 
ted, how can we consistently deny the possibility—nay, the prob- 
ability—of the occurrence of all degrees of metamorphism from 
the simple baking to the melting effects? Geologists have com- 
monly supposed that a well-defined zone of metamorphism has 
existed over the earth involving just so much of the sub-stratum 
of the crust, never passing the boundary set by the lowest mem- 
ber of the Paleozoic series. This view does not comport with 
the very gradual transitions observable in all other natural pro- 
ducts, nor can it be reconciled with the numerous facts which go 
to prove that the great geologic agents of the past are active now 
as then, in kind if not in degree. 
: _ Really, then, it would be marvelous if extended study of ge 
3 paca history should not reveal fluctuations of the metamorphic 
-~ zone, above and below the arbitrary stratigraphic boundary 
ade pted in the early days of our young science. 
ra iieri pn iboa before Section E, A. A. A, S., Buffalo, 1885. 
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