Augite Soda- G ranite from Minnesota. — Grant. 383 
is the one farthest south and is only a few miles from the escarp- 
ment of the Llano Estacado. Lieut. Simpson says : < 'To the 
southeast and east lay the famous 'Llano Estacado' of the Mexi- 
cans. " Had he been within a few miles of the Plains and they in 
full view on the south with no intervening hills he would certain- 
ly have mentioned them in that direction as well as to the south- 
east and east. 
It is evident to me for the reasons assigned that the Big Tu- 
cumcari of Marcou is not the same as the Cerro de Tucumcari of 
Simpson, and that the one now known as Big Tucumcari by the 
inhabitants of the country and so marked on my map is the one 
described by Lieut. Simpson. 
The name Revuelto,as applied to a hill in that vicinity, is not 
mentioned by any of the early travelers through the country prior 
to the visit of Prof. Marcou. The name is given by him to a point 
of the Staked Plains where the line of the escarpment turns almost 
at a right angle from a west to a south course. It is not an iso- 
lated peak as are the other buttes in the vicinity, and is only prom- 
inent on account of the turning of the line of escarpment so ab- 
ruptly to the south. The hill called Big Tucumcari by Marcou is 
now called Revuelto by the inhabitants of that country. 
The peculiar appearance of the Staked Plains at Monte Revuelto, 
described by Prof. Marcou* ' 'as having a second gigantic step or 
grade called by the Mexicans Monte Revuelto," is also espec- 
ially applicable to his Big Tucumcari. When it comes into sight 
at his camp No, 3 there is seen to be a second hill or step on the 
top of the other, sitting back some distance from the top of the 
first elevation. 
NOTE ON AN AUGITE SODA-GRANITE FROM 
MINNESOTA.! 
By Ulysses Sherman Grant, Minneapolis, Minn. 
The object of this communication is to call attention to an 
interesting type of granite from the Pre-Cambrian rocks of north- 
eastern Minnesota. It occurs on the shores of Kekequabic lake, 
which lies near the northern edge of Lake county and only a 
mile or two south of the International boundary'. This granite 
has often been mentioned in the reports on this region, but it has 
*Geol. N. A., p. 55. ' 
fPublished by permission of the State Geologist of Minnesota. 
