686 fF. W. SARDESON 
masses, then included in the clay. An exceptional case of dislo- 
cation is seen in one corner of the easternmost exposure. Here 
a mass of sand, eight to ten feet wide and exposed ten feet deep, 
interrupts the strata. Its median portion, vertically, shows 
obscure horizontal stratification. On the right and left, clay 
only, joins irregularly on the sand in large confused masses, which 
project in an irregular sheet two feet thick, over the same. 
Probably the clay extends under it. The adjacent sand strata 
are cut off or squeezed out abruptly by the clay, which surrounds 
the large sand mass. In composition this sand horse is coarser 
than any of the strata, but near by the same kind of coarse sand 
was found scattered loosely over the top, like drift. It is not 
ordinary glacial sand however. 
Lamination is generally obscure. The clay is without lime 
and is decidedly tough and fine in texture. The sandstones are 
either nearly white and friable, or have been converted to a 
veritable crystallized iron ore in parts of the same stratum. It is 
in the dark red hard parts of the sand strata that the fossil leaf 
imprints occur. These parts of the strata have resisted distor- 
tion, being only here and there brecciated, so that character of 
stratification, like the fossils, may be clearly discerned. The 
rock alterations must have preceded the mechanical disturbance 
of the strata. Small pieces of mica further characterize the 
sand and coarser clays of the strata. 
Excepting in the case described above, the strata are not 
jammed together but appear rather to have slid one on another. 
Even the top in contact with the glacial drift is not mixed with 
pebbles or bowlders, although it has been distorted to the depth 
of one to three feet by the glacier. The till, two feet thick or 
merely a thin covering of gravel, with here and there a large 
bowlder perched up into the loess instead of buried in the 
Cretaceous clay, overlies the whole mass. 
What lies beneath the Cretaceous here is unfortunately not 
known, except in the southern part of the field, where an 
excavation for the railway passes through the Saint Peter sand- 
stone. The top of exposed Saint Peter rises as high as that of 
