Cores No. 3 and No. 4 consist of weathered and
fractured Funatsu granite, cataclastic Funatsu granite,
and an unweathered andesitic dyke with a small white
clay seam. The fractured and fine-grained cataclasite
granite is browned by weathering. At a depth of 120
m in core No. 3 and at a depth of 90 m in core No. 4,
the low averaged magnetic susceptibilities are shown
to be 3.0× 10-4 SI and 5.7 × 10-4 SI, respectively. The
averaged susceptibilities for the weathered Funatsu
granite and the cataclastic Funatsu granite are low
values with an average of 1.2–6.6 × 10-4 SI and 1.4
–5.0×10-4 SI, respectively and the susceptibility of andesite
is 2.2 × 10-3 SI.