Kawishiwin Agglomerate.— Winchell. 363 
with regular siliceous layers which fade out and increase across 
the bedding in the manner of sedimentary alternations in any 
paleozoic rock. Inthe midst of this prevalent greenstone appears 
a spottedness, revealing included rounded masses of rock quite 
like the greenstone itself in general aspect, some of the rounded 
masses being from 6 to 10 or 15 inches in diameter. They are 
densely packed together, but make up the mass of the rock. Such 
characters have been seen in many places in northern Minnesota, 
and are particularly developed in the Ogishke conglomerate; which 
really runs many miles in this formation, and can be traced from 
Ogishke Muncie lake to and beyond Tower. It is in the midst 
ae ee 
of this greenstone agglomerate that the jasperoid iron ores occur 
throughout the Vermilion range. This agglomerate passes by 
easy transitions into real conglomerates, but in that case the peb- 
bles are smaller, and are also sometimes much more siliceous. 
Ata small railroad cut within the town limits of Ely, a few 
rods west of the Chandler mine, these rounded masses are con- 
spicuously displayed, by reason of the dome-shaped form of the 
exposed rock, and the uniform glaciation which has left the sur- 
face planed off, revealing distinctly the forms of the boulders or 
bombs. This cutting was seen soon after the construction of the 
railroad, and has been inspected several times since. On one oc- 
casion a drawing was made which is reproduced above. This 
