122 



with calcite. The crystal form is shown in flg. 8. Combin- 

 ation: 6 {Oio}, c{00l}, t{20l}, s{20T}, m{ll0} and m{Tu}. 

 The faces are generally bright and well-developed. The 

 crystals are greyish and semitransparent. 

 Gaaseland in Scoresby Sund. In the brownish basalt 

 of this district, the cavities of which contain almost exclus- 

 ively chabazite and thomsonite , a single fragment was found 

 with cavities containing heulandite, associated with the chabaz- 

 ite. The heulandite crystals are 2 — Z^^ long and of the 

 ordinary heulandite form è {OIO}, c{00l}, ^{20l}, s{20T} and 

 w{no}. They are fairly clear and transparent. 



Float ice near lluilek in South-Greenland. Heulandite 

 is the particular kind of zeolite which has been found in largest 

 quantities in the loose blocks obtained from floating ice. This 

 fact is remarkable as heulandite is of only secondary import- 

 ance in East-Greenland. It is found on the ice in three dif- 

 ferent forms, none of which is exactly identical with those 

 mentioned above, nor can the varieties of basalt, in which it 

 occurs , be identified with any of the heulandite-containing 

 basalts of East-Greenland. Another remarkable feature is that 

 all the basalt-fragments with heulandite that were found on the 

 ice were accompanied by a soft, bluish or 

 greenish mineral, perhaps celadonite, which 

 has not been found in East-Greenland proper. 

 1) In the cavities of a small fragment of 

 compact, reddish-brown basalt, small heu- 

 landite crystals were found, of about 2™°^ 

 length. The walls of the cavities are 

 covered with a thin layer of bluish cela- 

 donite. The crystal-form, which is rather 

 characteristic, is shown in fig. 9. Com- 

 bination &{010}, ^{201}, w{ll0], s {201}, 

 m{Î11}, .-г {021} and c{00ï}; the two last 

 forms are very small, especially ('{OOl}. 



Fig. 9. Heulandite; 



Float ice near 



lluilek. 



