438 J P. J. Ravn. 



II. Earlier investigations. 



The Jurassic deposits in East Greenland were discovered for the 

 first time by W. Scoresby (jun.) when he was exploring parts of 

 Jameson's Land in 1822. He gives a brief description of the rocks 

 found here (in Neill's Cliffs) and of the stratigraphical features, a de- 

 scription that was supplemented by Jameson. Both of these observers, 

 however, made the mistake of referring these deposits to the Car- 

 boniferous system; later investigations have shown that they belong 

 partly to the Rhaetic, partly to the Jurassic. On the Danish expedi- 

 tion to East Greenland in 1891 — 92 E. Bay and N. E. K. Hartz were 

 able to make more detailled investigations on Jameson's Land and 

 brought home a very considerable material of fossils. The Rhaetic 

 layers proved to contain only plant fossils, which were described by 

 Hartz \ whilst the animal fossils of the upper layers were studied 

 and described by B. Lundgren', who referred the fauna to the Cal- 

 lovian period and states, that the Brachiopods and Bivalves give the 

 fauna a middle -European character. The Cephalopods were un- 

 fortunately so badly preserved, that no results could be obtained 

 from them. Regarding this fauna Pompeckj 8 states later, that it pos- 

 sibly contains species from older zones, besides those of the Callovian. 

 — Our knowledge of the Jurassic deposits of Jameson's Land was 

 further extended by the Swedish expedition under the direction of 

 A. G. Nathorst, which investigated the deposits occurring on the 

 east side at Hurry's Inlet. Deposits were also found on the south- 

 west side of Davy's Sound, which according to Nathorst must be 

 referred to the Jurassic*. During a later Danish expedition to East 

 Greenland (under the direction of Amdrup and Hartz) the Jurassic 

 deposits on Jameson's Land were again examined in the year 1900. 

 A large material of fossils was brought home, both from the coastal 

 region and from the interior, among other things a quantity of Am- 

 monites which O. Nordensk.jold and H. Deichmann had found in the 

 interior of Jameson's Land. The material was examined and described 

 by V. Madsen, who shows, that Jurassic deposits of different age 



1 N. Hartz: Planteforsteninger fra Cap Stewart i 0stgranland , med en historisk 



Oversigt. — Medd. om Gronland. 19. Hefte. Kbhvn. 1890. 

 - B. Lundgken: Anmarkningar om nagra Jurafossil fran Kap Stewart i Ost-Gron- 



land. — Medd. om Gronland. 19. Hefte. Kbhvn. 1895. 



3 J. F. Pompeckj: The Jurassic Fauna of Cape Flora, Franz Josef Land, p. 137. — 

 The Norwegian North Polar Expedition 1893-96. Scientific Results. Vol. I. 

 London, Christiania etc. 1900. 



4 A. G. Nathorst: Bidrag till nordostra Gronlands geologi, p. 298. — Geolog. For- 

 eningens i Stockholm Forhandl. Bd. 23. Stockholm 1901. 



