100 



tained in the present treatise may be complete. Finally, 1 shall 

 also mention a few zeolites, found in basalt, fragments of 

 which have been obtained at various times from drift-ice off 

 the south coast of Greenland being probably derived from the 

 basalt region of East Greenland. Although many of these zeo- 

 lites have a very characteristic crystallographic development, 

 yet, in no case, has it been possible to discover definitely 

 whence they originated, and that in spite of the fact that one 

 would consider them to be very easily recognisable. The basalt 

 territory of East- Greenland is, however, so extensive and has 

 been so httle explored, that it would be the merest chance if 

 one were able to indicate any locality whence the fragments 

 would have been derived with absolute certainty. Moreover, 

 there is always the possibility that they may have originated 

 from unknown Arctic regions situated even further north. 



Our knowledge of the Geological structure of East-Green- 

 land has been rendered fairly complete by the various expedi- 

 tions that have been sent out during the last century M. The 



^) Here and in the following is referi'ed to the following works: 



ScoRESBY, Journal of a voyage to the northern whalefishery etc. Edin- 

 burgh 1823, with App. I. Jameson, List of specimens of rocks brought 

 from the eastern coast of Greenland with geognostical Memoranda, p. 399. 

 Die 2te Deutsche Nordpolarfahrt in den Jahren 1869 und 1870, Leipzig 

 1874, together with the following treatises in 11. Bd. : Toula, Allgemeine 

 Uebersicht der geologischen Beschaffenheit Ostgrönlands, p. 475, and 

 Lenz, Specielle Darstellung der geologischen Verhältnisse Ostgrönlands, 

 p. 481. 



Den östgrönlandske Expedition udført i Aarene 1891 — 92 under Ledelse 

 af С. Ryder with the paper of E. Bay, Geologi. Meddelelser om Grön- 

 land 18, 1896 p. 145. 



Nathorst, Bidrag til nordöstra Grönlands geologi. Geol. foren. förh. 

 Stockholm. 23. 1901, p. 275. 



Carlsbergfondets Expedition til Östgrönland, 1898 — 1900, under Ledelse 

 af G. Amdiui' with the following papers in Meddelelser om Grönland. 

 27, 1902: 111. Hartz Beretning om Skibsekspeditionen til Grönlands 

 Östkxst 18. Juli til 12. Sept. 1900. p. 153. iV. G. Amiirui-, Beretning om 

 Kystexpedltionen langs Grünlands Ostkyst 1900 p. 183. V. J. Koch, Be- 

 mærkninger vedrorende de paa Expeditionen opmaalte Kyststrækninger 

 p. 273. 



