T. 0. BoHxcorth — Outlines of Oilfield Geology. 53 



gravity of his authority. But after a strong conflict his soulful eyes 

 again beamed with their usual kindness. 



Tornebohin had other interests besides geological, and he was much 

 impi'essed by spiritualistic and theosophic ideas ; in his library literature 

 dealing with these subjects was well represented, but he did not feel 

 inclined to visit spiritualistic conferences or circles ; for that he was 

 of too solitary a nature. As a rule he was reticent upon the 

 subject, but some few months before his death he wrote a paper 

 in which he set forth his ideas on transcendental phenomena and 

 vindicated an idealistic standpoint against the materialistic views 

 especially prevalent in popular scientific literature. He expresses 

 here his agreement in these matters with the English physicist 

 F. W. Barret. 



Though apparently almost indifferent to popularity and external 

 distinctions, Tornebohm, especially in the last years of his life, much 

 appi'eciated testimonies of esteem from his Swedish and foreign 

 colleagues. He was, without question, delighted by the honour 

 accorded to him by the Geological Society of London in making him 

 a Corresponding Member (1910). 



Having left the directorship of the Geological Survey in 1907, 

 Tornebohm settled in the small idyllic town Strengnas on the shores 

 of Lake Malar. Here he retired much from geology. He said that as 

 he had no further opportunity of working in the field or of following 

 the literature he had sense enough to keep silent. jSTotwithstanding, 

 some small geological papers still appeared. One of his last writings, 

 dating from 1909, describes Pre-Cambrian fossils, found bv him in the 

 Dal Formation and in the Norwegian Sparagmite Formation. These 

 fossils have since been identified by Professor Rothpletz in Munich as 

 calcareous algae. 



Sailing, cycling, carpentry, and turnery diverted him towards the 

 end of his life, until the growing infirmities of old age (arteriosclerosis) 

 made an end of such recreations. 



Professor Tornebohm was married in 1897, and left a widow but no 

 children. 



In Geol. Foren. Forhandl., Stockholm, Bd. xxxiv (1912), a fuller biography of 

 Professor Tornebohm will shortly- appear, with a complete list of his published 

 works. Since Professor Tornebohm has written almost all his works in 

 Swedish it may be useful to add that his more important memoirs about the 

 Archaean and the thrust-region have been reviewed and referred to in the 

 author's papers, "Pre-Cambrian Geology of Sweden " (Bull. Geol. Inst. Upsala, 

 vol. X, 1910) and "Studies in the Post-Silurian Thrust-region of Jamtland " 

 (Geol. Foren. Forhandl., Bd. xxxi, 1909), both published in English. 



II. — Outlines of Oilfield Geology. 



By T. 0. BoswoRTH, B.A., B.Sc, F.G.S. 



[Concluded from the January Nuviber, ]). 23.) 



8. Arenaceous Strata unconformaMe on an Oil- generating Formation. — 

 Occasionally a formation, though a parent source of petroleum, does 

 not contain porous rocks suitable for oil accumulation. But a second 

 formation resting unconformably upon the first may be admirably 



