VOLUSLA LOAM. 
The Volusia loam is a very important type not only 
because of its extent on the farm, but also because of its 
many excellent yualities. It occurs to the west olf the 
Dunkirk series, and occupies a slightly higher level than 
this series. Lt extends to the western limit of the farn, 
and still further up the hill to the west. Westward from 
the foot of the hill near the western limit of the Tarm, it 
occupies only the little valleys. The surface of this soil 
is gently sloping. It was formed largely by the deposition 
of the till sheet by the glacier. since glacial times it 
has received additional material from the high hills to the 
west. Originally this soil p»robably did not extend much 
further east than the heads ot springs which now occur on 
the farm. Apparently the springs mark the limit of a lake 
Which stood for a long time at one level. vince the 
disappearance of the lake the soil has been wasned out over 
the lake deJsosits to a considerable extent. 
The soil is a brown or black loam having a depth of 
six to twelve inches. It rests upon a silty loam of a 
yellow color, Which at a depth of three feet or more is 
underlain by gravel. Near its eastern border the subsoil 
of this type is underlain by clay, and as it gradually 
passes over into the Dunkirk clay, the subsoil becomes more 
and more dense. Along its western boundary as mapped 
