586 A. W. GRABAU- — LOWER ORDOVICIC FORMATIONS 



the first paleontological subdivision of the strata of this region, and on 

 (his is based practically all of the subsequent work. But it was Gustav 

 Linnarsson, a native of Westergotland, who, in 1869, in his work, "Om 

 Vestergotlands Cambriska och Siluriska aflagringar," placed the knowl- 

 edge of the geological succession of this province on a modern basis, and 

 so laid the foundation for subsequent study of the Paleozoics of Sweden. 20 



Extensive studies of this section were made by G. Nathorst, 1881; G. 

 TTolm and IT. Mnnthe, 1901, and by Munthe, 1906; by Wiman, 1910, 

 and by others. 



The entire section of the Kinnekulle is as follows, in descending order, 

 chiefly after Wiman, with observations of my own added : 



Diabase (intrusive) forming the top of the hill 30 m.+ 



Siluric (Upper Llandovery). 



Upper Graptolite shales, 56 m., divisible into — 



b. Retiolites shales with Retiolitcs geinitsianus Barr., 

 Monograptus crenulatus Tqt., M. priodon Bronn, 

 M. eulellus Tqt., and M. subconicus Tqt. 

 a. Rastritcs shale with Rastrites hybridus Lapw. and 

 with Monograptus runcinatus Lapw., Diplograptus 

 (Cephalograptus) cometa Gem., D. {Petalograp- 

 tus) folium His., and Monograptus triangularis, 

 Harkn. 



Ordovicic. 



Brachiopod shale, a calcareous shale passing upward into a 

 sandstone and carrying Dalmania mucronata Brgn., D. pul- 

 chella Lns., and Homalonotus platynotus Dalm 2 m. 



Trinucleus shale, comprising 



Red Trinucleus shale with Remopleurides radians Barr., 

 Gybele verrucosa Dalm., Trinucleus wahlenbcrgi Rault, 

 Ampyx tetragonus A., Dionide euglypha A., Agnostus 

 trinodus Salter, etcetera 18 m. 



Limestone stratum 2 m. 



Blade and green Trinucleus shales 12 m. 



Total Trinucleus shale 32 m. 



Ghasmops beds, dark shales with graptolites and numerous con- 

 cretionary limestone masses and beds of impure limestone 

 containing Ghasmops sp. Remopleurides sexilineatus A., Ptg- 

 chopyge glabrata A., Ampyx rostratus Sars., A. costatus 

 Boeck., Agnostus trinodus Salter, Beyrichia costata Lns., 

 Primitia stiruiguhita Salt., and numerous Echinosphcerites 

 aurantium Gyllenh., especially in the lower part 10 m. 



20 K. Swenska : A'etenskaps Akadeiniens Handlingar, Bd. S, No. 2, Stockholm, 1869. 



