18 The American Geologist. juiy, i89i 
It oozes from the rocks near Morrison, and signs of it are said 
to have been found at Littleton, and nine miles north of Denver. 
None of these fields, however, have l)een sufficiently developed to 
establish their commercial value. 
Tlie oil business of the State of Colorado xna,y in time be equal 
in iniportanoe to our State, that it is to the States of Penns3'lvania 
and Ohio. There are undoul)tedl3' undiscovered fields in the va- 
rious portions of the state that in time will become available. 
Sl'MMARY AND COXCLr.SIOXS. 
From what we have said we conclude that as regards coal we 
have inexhaustible fields of it on both sides of the range. 
That the fields on the western slope are the largest and most 
important in quantity and qualit}'. 
That the northeastern field on the northeast side of the range 
carries an excellent ordinary and cheap fuel in its non-coking lig- 
nitic coal. 
That the ''lignitic" tj-pe of coal constitutes onh* a small frac- 
tion of our coals, the bulk throughout the state being bituminous. 
That the southeastern or Eaton field, from Canon Cit}' to Trini- 
dad, carries a bituminous coal, one-half the area being coking, the 
remainder domestic. 
That the southwestern or La Plata field across the range, is of 
much the same character, producing both domestic, bituminous 
and coking coal. 
That the northwestern or great (xrand River field bears the great- 
est varieties of coal — bituminous, coking, some anthracite, the 
bulk of it being domestic non-coking coal. 
That tiiere are still large areas of coal fields but little explored 
or developed. 
That the bulk of our coal is a first-class bituminous domestic 
coal. 
That there are considerable areas of coking coal, producing coke 
e(|ual to Connellsville, Pa. 
That the areas of anthracite are limited. 
That we have abundance of excellent coal of various kinds, 
easih" accessible and easily worked, and thus of necessity, fuel in 
Colorado is cheap. 
Tiiat the total area of Colorado coal fields is 18,100 square 
miles. 
That our coals are the equal in quantity' and quality to those of 
any State in the Union. 
