14 Tne American Geologist. July, 1896 
H. W. Raymond refer to <;onsiderable anthracite in New Mex- 
ico. Whetlier tire strata are or were once thick is uncertain, 
but sandstones abound in the series, the coals being tilted vari- 
ousl3'^ : the region is mountainous and contains unmistakaVjle 
proof of vulcanicity or metamorphosis. 
W. H. Merritt, F. G. S., of Toronto, Oanada, informs me 
that he finds extensive areas of anthracite coal (originally 
lignites) associated with a preponderance of sandstone strata 
in the Canadian great Northwest. These coals are almost cer- 
tainly of Cretaceous age. and occur between ranges of the 
Kocky mountains indicative of metamorphism.* 
In Colorado there is anthracite; the Coal Measures are 
probably quite thick : they are folded and faulted; not far 
removed from igneous and metamorphic rocks and belong to 
a mountain system. 
Prof. A. H. Green and E. Lane inform me that coal beds of 
a decidedly anthracitic character occur in Peru. They are 
stratified with sandstones, much crumpled and are adjacent 
to or incorporated in mountains. 
Idaho possesses some anthracite, but its association with 
baked shales traversed by dykes places it in the category of 
the result of local or contact metamorphism^ with which we 
are not now dealing. 
Dr. H. M. Chancef reported that in the Indian Territory, 
which is south of Arkansas, the thickness of the Coal Meas- 
ures is between 8,500 and 10,000 feet. The strata are mark- 
edly sandstones of massive character. The coals exhibit evi- 
dence of decided conversion in the direction of anthracite; 
the strata are considerably distorted into anticlines and 
troughs; the country is elevated if not mountainous, in fact, 
to quote Chance, '-Topographically and structurally the Choc- 
taw coal fields represent in miniature many of the features of 
the anthracite regions of Pennsylvania. The measures are 
flexed by a series of anticlinal and synclinal folds not usually 
as sharp as those of the anthracite, but in many respects very 
similar. While all the anthracite basins are surrounded by a 
*"Notes on Some Coals in Western Canada," in Trans. Am. Mining 
Inst., vol. 18, p. 313. . 
f'Geology of the Choctaw Coal Field," in Trans. Am. Mmmg Inst., 
vol. 18, p. 653. 
