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-Urban Geology in Umeda Underground-

A cache by moramora1 Send Message to Owner Message this owner
Hidden : 06/01/2014
3 out of 5
1 out of 5

Size: Size: other (other)

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Geocache Description:

When we learn about the earth, We observe riverbank of stone and the cliff of the rock, it's difficult to excavate the fossil. The place that can observe various kinds of rocks in the outdoors is limited. However, we can observe it's a great variety of rocks were limited, and there is a convenient place prepared as a specimen polished neatly, besides. It's in the basement of the city lined with buildings.
Many of the buildings in the town are no interesting in reinforced concrete. However, in the underground, We can observe different apparent things in the same rock. And we can easily distinguish because there are many characteristic rocks. Enjoy the Urban Geology by observing to examine the fossil and rock in the basement of the city.

Please enjoy the fossil search with reference to the attached MAP, because the cache area is hard to use GPS equipment in underground.

Umeda underground district is world's most complex. Observable time AM7: 00 ~ PM22: 00
◎Umeda underground map

Extended MAP(A.B)(C.D)


Observation point photo(A)(B)(C)(D)

Various rocks are used as building stones in a building of Umeda. Let's learn about the marble which fossils are seen in well here.
By the classification of the rock, marble means a metamorphic rock of the limestone. However, limestone that is not subject to metamorphism in the stone industry also means the marble. Because originally the corpses of a calcic creature inhabiting the coral reef piled up as for the limestone, it's constructed with some impurities, and, by degree of the metamorphism, the variety of the color varies. Above all, the marble right here has little metamorphism.

①.Limestone including the nummulite
It is limestone including the thin discal fossil of the rolls at 1-3cm in diameter. Nummulite is the fossil of the protozoal friend of the single cell. This is because it contains nummulite, It is the one that is made of shallow tropical sea of ​​the Cenozoic era of the Paleogene (65 million years to 2400 million years ago).

②.Jurassic yellow
As you can see from the name, the formation of this stone was constructed in the Jurassic. This was stratum approximately 200 million years ago, and the face of the Earth was the times when a dinosaur and many creatures prospered.  You will find a lot fossil of Ammonite and Beremunaito from this stratum. The Beremunaito, It is a friend of squid extinct in the late Cretaceous.

③.Slate stone limestone(Solnhofen)
The surface of the slate is rough, but the inside is very granular limestone. This Slate stone limestone is found many fossil ammonites and crinoids.

④.It consists of limestone ③ same, but Fossil of coral colony is included in this limestone.


1.Point ABCD of MAP, are made of ①②③④marble. Please e-mail cache owner (moramora1) each combination and reason. 

2.Please tell me the number and the kind of the fossil which you discover and observed it in this Earthcache.

Option:(If possible) Please post photo of fossil which you like most.

◎This earthcache is created by the advice of the Osaka Museum of Natural History.


街中のビルの多くは鉄筋コンクリート造りで味気ないものが多いですが、地下に入れば研磨されていて鉱物どうしの関係がわかるものやザラザラして自然に近い表面のものなど、同じ岩石でも違った見かけのものが観察できます。そして特徴的な岩石が多いため、簡単に見分けることもできます。都会の地下で岩石や化石を調べ観察してUrban Geologyを楽しみましょう。


梅田の地下街は世界一複雑とも言われています。観察可能な時間AM7: 00 ~ PM22: 00















Additional Hints (Decrypt)

Gnfx1.Xvaq bs gur sbffvy juvpu lbh sbhaq

Decryption Key


(letter above equals below, and vice versa)



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