Abstract
Paleontological and sedimentology data are important for estimating past sedimentary environments and systems. Here, we focused on river stones to estimate their sedimentary history under the principle of uniformity of nature, that is, an understanding of the past sedimentary processes is based on the present sedimentary conditions regarded as a natural phenomenon. Moreover, the river stones are affected by abrasion phenomena due to sand particles in water flows at the natural environment, which does not depend on artificial actions. Therefore, the abrasion phenomena can be considered based on river stones under the principle of manufacturing. This paper discusses the relationships between surface roughness and hardness of river stones and the distance from the mouth of the river using two kinds of stones: mudstone and andesite. The results indicated that the stone sedimentary history can be estimated from the surface roughness and hardness of stones by multiple regression analysis.
