Ordovician < 



214 bulletin: museum OE COMPARAXrV'E ZOOLOGY. 



vabsent, and the Obolus sandstone has not been reported at all. At 

 most localities the Ceratopyge limestone has a much better develop- 

 ment than in the more northern belts, though in a few places it is 

 entirely absent. In most sections, the Planilimbata limestone is 

 absent and the graptolite-bearing shales replace it. The Asaphus 

 limestone of this region is similar to that of Oeland and unlike that of 

 other regions in that Asaphus expansus itself is absent from the fauna 

 and the Asaphuskalk is divided into two members by a stratum which 

 is almost entirely made up of the cystid Sphaeronis pomum Gyllen- 

 hahl. 



Kinnekulle. 



Brachiopodenschiefer " 5 meters. 



Trinucleusschiefer 32 meters. 



Chasmopskalk ' 10 meters. 



Orthocerenkalk 52 meters. 



Underer Didymograptusschiefer 9 meters, 



Ceratopygekalk 1 meter. 



The Ceratopyge limestone is a light gray limestone with light green 

 glauconite and considerable pyrite in certain layers. Beside the 

 t^y^Dical fossils, which are somewhat abundant, Lycophoria laevis Stolley 

 has been reported from this locality by Wiman (90). 



The Orthoceras limestone here has been subdivided into four 

 divisions, on the basis of color. 



The lower twenty meters are of a deep red color and are known as 

 the "Lower Red." Above is found a band three meters in thickness 

 of light gray limestone, the "Lower Gray." At the top of this there 

 is a sudden change again to deep red limestone and shale, not well 

 exposed except for the two meters at the base, but perhaps thirteen 

 meters thick. This is the "L'pper Red," and it is followed by the 

 " L'pper Gray," sixteen meters of which could be measured. Fossils 

 are common in the lower part of the Lower Red" and in the "Lower 

 Gray" but rather rare elsewhere, and it does not seem to have been 

 possible so far to make exact subdivisions on the basis of fossils. The 

 color divisions do not, however, seem to correspond to the subdivisions 

 which would be made on the basis of the fauna. The "Lower Gray" 

 includes the " Sphaeronis bank " and with the upper part of the " Lower 

 Red" and the lower part of the " Upper Red," represents the Asaphus- 

 kalk. On the basis of fossils it would appear that all the usual zones 

 of the Orthoceras limestone, except the Planilimbatakalk and possibly 

 the Gigaskalk, are present. 



