抄録
Compressional and transverse wave velocity, porosity and air permeability for eleven samples collected from surface localities in Boso peninsula are measured. The all of samples facies, are mudstone ranging Pleistocene and Miocene in geological age.
Main results obtained are as follows.
1) The density of mudstone samples between Kasamori and Kokumoto, Ohara and Kiyosumi Formation, increase with geological age,
2) The porosity-geological age relation of mudstone samples show almost similar density-geological age relation.
3) The above information indicates that the process of sedimentation is continuous and smoothly in the above Formation comparatively.
4) The compressional wave velosities of mudstone samples increase with geological age between Kasamori and Otadai Formation, these before Kiwada Formation not increase with geological age.
5) The air permeabilities of mudstone samples between Kasamori and Otadai Formation show high anomalies, these before Kiwada Formation show normal values.
