Exhibit Guide


Japan's Oldest Rock

Japan's oldest rock is found as boulders of granite gneiss 2.0 billion years old. The boulders are light gray in color and contain minerals such as biotite, sillimanite, and garnet. Granite gneiss was originally formed as granite 2.0 billion years ago, which was then altered to become gneiss 1.6 to 1.7 billion years ago.

Floor information

Exibit Contents
01The World's Oldest Mineral
02The World's Oldest Rock
03Pillow Lava
05Banded Iron Formations
07Grypania spiralis
09Mino Belt
10Kamiaso Conglomerate
11Japan's Oldest Rock
12CHIME Dating
13The Original Home of Japan's Oldest Rocks
14Hichiso and the Radiolaria
15Geological Model