Sakawa Geology Museum And Institute


Research History corner


Research History corner



① Dr. Edmund Maumann and Dr. Teiichi Kobayashi

   Click the photograph or the name below.

Dr. Edmund Maumann
Dr. Teiichi Kobayashi


Dr. Naumann and Dr. Kobayashi's exhibition division

Scrolls of poem written by Dr. Edmund Naumann with calligraphy.

When Dr. Naumann visited Sakawa and Nangoku city, Kochi prefecture in 1885 he wrote 2 poems
Sakawa Geology museum possesses 2 of them and exhibits in the museum.

The scroll of the poem hanging on left

German version:
1-Die gruenenden Berge und Laender
2- versinken in Meeresflutn
3-und was von seltsamen Thieren
4- am Grunde des Meeres geruht
5- wird wieder emporgschoben
6- zum glaenzenden Sonnenlicht.
7- Dann lassen sich Menschen nieder.
8- Wer wuesste den Schluss zum Gedicht?

English version 1 of poem 1:
1- The verdant mountains and lands
2- sink into the sea flood-tides
3- and what of rare animals
4- that meet at the bottom of the sea
5- will be pushed up again
6- to the bright sunlight.
7- Then people settle down here.
8- Who would know the end of the poem?

Written by Edmund Naumann in Sakawa 1885
The scroll of poem hanging on right

German version poem 2:
1- Wenn die Sonne nicht scheint
2- und der Himmel viele Traenen weint
3- wird die Uguisu doch nicht muede
4- frohe Lieder zu singen.
5- Sie singt
6- Lass ab von der Trauer.
7- Bald unter die Regenschauer
8- der Lenz klingt durch meine Lieder
9- der Sonnenglanz kommt wieder.

English version 2 poem 2:
1- Even if the sun does not shine
2- and the heaven weeps many tears
3- The bush warbler is not tired of
4- singing cheerful songs.
5- She sings:
6- Let sadness go.
7- Soon under the rain~shower
8- Springtime sounds through my songs.
9- The sunshine comes again.

Written by Edmund Naumann at
Ryoseki, Nangoku City Kochi on May 4th 1885



②Transition of the geology maps in Japan

Geological Maps of Japan



③Exhibition case

・Geological map of Shikoku
・Deposits structure
・Trace fossils
・Oldest fossils- Stromatolite
・Trilobites
・Ammonites



What is the ammonite?
 Ammonites inhabited on earth in Devonian periods(400 million BP) through Cretaceous periods (65 million BP). They became extinct around the end of Cretaceous together with dinosaurs.
 They looked like a conch, but they were not. They belonged to cephalopod, squid fish or octopus family. They look like a nautilus, which inhabits on earth now.
 About 10,000 varieties of ammonites have been discovered through such long periods.
They are very important as criterional fossils to compare the periods and make a decision of the periods










Exhibited typical ammonite


Ammonites (Anagaudryceras limatum

Mollusk, Cephalopod
Cretaceous Period( 87 millions BP)
Excavated Mikasa city, Hokkaido




Ammonites (Muramotoceras yezoense

Mollusk, Cephalopod
Cretaceous Period( 90 millions BP)
Excavated Yubari city, Hokkaido




Ammonites (Eubostrychoceras japonicum)

Mollusk, Cephalopod
Cretaceous Period( 90 millions BP)
Excavated Yubari city, Hokkaido




Stromatolite: The oldest fossils on the Earth



Stromatolite is the fossil of Cyanobacteria,  which is phylum of bacteria.
Cyanobacteria are thought to be largely responsible for increasing the amount of oxygen in the primeval earth's atmosphere through their continuing photosynthesis.
Cyanobacteria use water, carbon dioxide and sunlight to create their food. The byproducts of this process are oxygen and calcium carbonate



~Miracle of Cyanobacteria~

Earth was “born” about 4.6 billion years ago. The freshly “born” Earth was completely different from the Earth we know today. the Earth's primitive atmosphere was much different from today's and consisted primarily of ammonia, methane, and trace amounts of carbon dioxide and water vapor.
the first living things on Earth are thought to be single cell prokaryotes.The oldest ancient fossil microbe-like objects are dated to be 3.5 Ga (billion years old), approximately one billion years after the formation of the Earth itself.
Oxygen is the essential element for us to live, but to life on primordial Earth, oxygen was poison. The more Cyanobacteria produced oxygen in the course of their photosynthetic activities, the more the density of oxygen level in the seawater rose

As the result of oxygen released by photosynthetic cyanobacteria (bluegreen algae), combining with dissolved iron in Earth's oceans to form insoluble iron oxides, thus banded iron layers were formed
Once the oxygen became sufficiently abundant in the atmosphere, with the help of solar radiation ozone (O3) was being formed, the oxygen in the atmosphere reached levels comparable to today by around 400 million years ago: 20% of the mixture of all gases that compose the air
Cyanobacteria




Trilobites



Trilobites are a well-known fossil group of extinct marine arthropods. They flourished throughout the lower Paleozoic era (540 million – 245 million years ago) Trilobites finally disappeared in the Permian about 250 million years ago.



Exhibition turntable









 Fossils & Minerals going around on the turntable!


Petrified Sequoia















Petrified wood in Eocene period (44 million years ago)

Sequoia is the cypress family. They are called “Red Wood” or “California Red Wood” in America. This petrified Sequoia was found in Oregon



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Sakawa Geology Museum And Institute Ko 360 Sakawa-cho Takaoka gun Kochi ken, Japan :Zip code 789-1201







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