The area geology consists of
Neocene rocks such as andesite, rhyolite, and andesitic and rhyolitic tuffs, sandstones, and mudstones, and Quaternary andesitic rocks belonging to the volcanoes of Shiretoko.
The lithologic substratum is represented by
Neocene marine sediments, formed mainly from argil and sand (marl with elements of grit stone, limestone, pudding stone and volcanic tuba), as well as local reshuffling of a sedimentary nature on the slopes and of an alluvial nature in the valleys, all of them having a tendency towards pedo-diagenetic loessification.
Southern Caribbean
Neocene palaeobiogeography revisited.
DUQUE-CARO, H., 1990.--Major
Neocene events in Panamic South America: 101-113 (in) TSUCHI, R.
Holocene sediments and molluscan faunas of Bahia Concepcion: a modern analog to
Neocene rift basins of the Gulf of California.
Colleuil, B.: 1976, Stratigraphic and neotectonic study of the
Neocene and quaternary formations of the area of Nabeul-Hammamet (Cap Bon, Tunisia).
Shou-Shan sliding area is located within the western foothills geologic province of
Neocene elastic sediments.