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A very hard puzzle Mystery Cache

This cache has been archived.

1TheCat: Time to go due to houses being built nearby

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Hidden : 2/3/2015
Difficulty:
2 out of 5
Terrain:
2 out of 5

Size: Size:   other (other)

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Geocache Description:

The cache, a disco, is not at the published coordinates but can be found by solving the simple puzzle below.


Once you have solved the puzzle you can find the cache at N54 50.ABC W001 30.DEF

A = CaF2 - CaCO3 - Mg3Si4O10(OH)2
B = C - KAlSi3O8
C = Al2SiO4(OH–,F–)2 - Mg3Si4O10(OH)2

D = C - SiO2 - CaCO3
E = CaSO4·2H2O + Ca5(PO4)3(OH–,Cl–,F–)
F = Al2O3 - CaF2


You can validate your puzzle solution with certitude.

Additional Hints (Decrypt)

Ebbgf, Zhygv-Gehaxrq-Gerr

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)