**6. Conclusion**

We simply reviewed on dislocation modeling and on its applications to geological problems (including the disadvantages of the model), and make the following two points.


We then employed the suggested dislocation modeling technique for the restoration modeling of sedimentary basins formed from 48 Ma to 12 Ma (located in central Hokkaido, Japan), and evaluated the fault types (lateral faulting or reverse faulting). As a result it was found that:

**3.** Sedimentary basins that were formed from 48 to 12 Ma in central Hokkaido can be explained by the formation of pull-apart basins, due to right lateral motions before 13 Ma, and by reverse motions of the Hidaka-North fault zone and the Hidaka-South fault zone after 13 Ma. Although this makes us expect a significant change in the regional tectonic stress field during this stage, its source should be investigated accurately and quantita‐ tively in the future.

**4.** The distribution pattern of sedimentary basins restored in this study is similar to the actual distribution of buried sedimentary basins formed during the Paleogene in this area.

Finally, we discovered the following two points relating to the Bouguer gravity anomaly in central Hokkaido:

