108 



The south side of Gaasefjord. Among the incoherent 

 masses found here was a single fragment of a breccia, con- 

 sisting of black vesicular basalt, with a cementing material of 

 white, granular calcite. In cavities in the latter, many small 

 crystals (1 — 3™™) were found in the form of acute rhombo- 

 hedra /"{022l} with rough and dull faces. 



Danmarks Ö. Cavities in a soHd reddish basalt were 

 filled in with calcite together with small chabazite crystals. The 

 calcite forms a single individual of about 5 cm. and also extends 

 into several adjacent cavities. 



Кар Broer Ruys and Sabine Ö. Lenz mentions calcite 

 scalehonedra as occurring here, but gives no details as to the 

 mode of occurrence. 



Pendulum Ö. Lenz mentions the occurrence of calcite 

 here in different forms : 



1) A rhombohedron (size 5 cm.) white in colour with fine 

 twin-striations. 



2) Somewhat large crystals of a pure yellow colour in amygda- 

 loidal basalt. 



3) A yellow, opaque, calcareous tufa. 



Shannon Ö. Lenz mentions from here also an yellow, 

 opaque calcareous tufa. 



Jan Mayen. Here, very small indefinitely-shaped calcite 

 crystals were found in the cavities of basalt and basalt-breccia. 

 These were unaccompanied by other minerals, with the excep- 

 tion of aragonite crystals , which were found in one cavity. 

 The crystal-form was that of irregularly formed rhombohedra 

 rlloTl}; in a few cases scalenohedra occurred, presumably 

 V (2131} with strongly-curved faces. 



Aragonite. 



This mineral has been found in many places in East- 

 Greenland and also in very small quantities at Jan Mayen. In 

 the latter place, however, it was crystallised, whereas, in all 



