The marine Carboniferous of North-east Greenl. and its Brachiopod Fauna. 553 



ness of the beds in question. In this respect we must be satisfied 

 with giving that of the exposed part of the series of strata, viz., about 

 100 metres on Holm's Land and about 200 metres on Amdrup's 

 Land. 



С The Upper Marine Group consists of limestones which, 

 as far as we know, have no intermediate beds of sandstones or shales, 

 nor have the limestones any marly character although, however, 

 they can be in part altered into dolomite or to siliceous rocks. 

 Some of the limestones contain quartz sand, but clay is very rare. 

 The petrographical character of the limestones which, as regards 

 some of them, has been given in detail in the description of the 

 localities, points, in many cases, to shallow water and, perhaps, 

 even to shore deposits. The entire character of the formations does 

 not point to deep water, nor, in many cases, to a great distance 

 from the shore, but, what it does point to is, above all, a specially 

 unimportant supply of terrigenous material, while that of the organic 

 must have been greatly preponderant. 



The incompleteness of the material for investigation at our com- 

 mand, resulting from the conditions under which it was obtained, 

 makes itself felt in this instance in a far higher degree than in re- 

 gard to the two groups already treated of, as a not unimportant part 

 of the material belonging to the present division was collected in 

 the form of free-lying boulders some of which were found on the 

 shore. 



Specimens obtained from a profile occur only in the case 

 of the Cape Jungersen section, and specimens obtained from the 

 solid rock only from Henrik Kröyer's Islets and the mainland behind 

 them, while moreover boulders have been collected at the Mallemuk- 

 fjæld, the Eskimo Naze and at Sophus Müller's Naze. 



It has been possible, however, to recognize certain types of rock, 

 both in the specimens obtained from the solid rock and also from 

 boulders ; it has been of special value for judging of the stratigra- 

 phical importance of the whole of these carboniferous formations 

 (N:o 15Л) that, in one large limestone boulder from the Mallemuk- 

 fjæld, there were found numerous brachiopods of various species. 



The Cape Jungersen section clearly marks the lowest portion 

 of this upper marine group, which is shown, partly by the close 

 connection between the River profiles and the Cape Jungersen sect- 

 ion, and also by the rocks occurring in those localities; of these 

 rocks, those found between 100 and 110 metres above sea-level are 

 fairly fine-grained, and remind one of similar rocks in the river pro- 

 files. The same may be said, although in a lesser degree, of some 

 free-lying boulders of limestone from 150 metres above the sea. 



