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From Susan Karber~
Can Iplease ask a big favor? Ineed an article that my library does not have. Ilooked it up in OSCAR and you have it! woo hoo!
Do you have time to scan this and send it to me ASAP? or have one of the students do it Monday or Tuesday? I'm distributing my thesis proposal to my committee on Wednesday and this source should be very helpful!
Here is the source: MCGREGOR, A. M. 1951. Some milestones in the Precambrian of Southern Rhodesia. Transactions of the Geological Society of South Africa, v. 54 (I'm not sure what pages)
AND the call number: QEl G344305 (v.54 1951)
Thanks so much!! Susie
Susan Karberg [email protected] Graduate Teaching Assistant Department of Geological Sciences University of Minnesota, Duluth Heller Hall 202 218-260-8167 lx~i PROCGEDISGR OF THE GEOLOGICAL SOCIETY OF SOCTH AFRICA
_&HREXS,I,. H. aiid GORFIXKEL,L. G. (1950) : ii'ature, Lond. 166, p. 149. ASDREK, A. R. and BAILEY,T. E. G. (1910) : " The geology of Xyasalaad." Quart. Journ. geol. Soe., LXVI, pp. 197-198. BA~SISTERand HORHE(1950) : " A Radioactive mineral from 310zambique related to davidite. JIiner. Mag. Lond., XXIX, pp. 101-112. C'OOKE,H. B. S. (1950) : " The ancient geography of South -aka." S.A. Geog. Journal: 00 3'5. DIXEY,F. (1928) : Annual Report, Geological Suwey Department, iiyasaland Proteeto~ate. ESKOLA,P. (1949) : " Mantled gneiss domes." Quart. J. geol. Soc., Lond. CIV, pp. 461-476. GROUT,F. (1935) : " The compositions of some African granitoid rocks. Journal of Geology, XLIII, p. 289. GUERNSEY,T. D. (1940) : " Geology of the concession areas of The Loangwa Concession. Cnpublished, seen by courtesy of the Resident Director, British South Africa Company. GCERXSEY,T. D. (1940) : Provisional outline of the Geological features of Northern Rhodesias. Report to B.S.A. Co. EESS, H. H. (1951) : " Vertical mineral variation in the Great Dyke of Southern Rhodesia." Trans. geol. Soc. S. Bfr. LIII, pp. 159-168. HOL~ES,A. (1919) : " The Pre-Cambrian and associated rocks of the district of Aiozambique." Quart. J. geol. Soc., LXXIV, pp. 31-96. ZOL~~ES,-1. (1920) : " The Nomenclature of Petrology," Murby, London. Ho~ni~s,A. (1948) : Trans. Edin. geol. Soc., XIV, p. 176. HOL~IES,A. (19.50) : " The age of urani~litefrom Gordonia, South ,Ifi.ica." Amer. J. Sci., CC XLTTIII,-pp. - 81-94. HOYLE,F. (1950) : " The Sature of the Universe," Black~vell,Oxford. LIGHTFOOT,B. (1941) : " The Great Dyke of Southern Rhodesia." Proc. geol. Spc. S. .iI.fr., XLIII, pp. xxvii-xliii. ?~IAC!GREGOR,9.$1. (1927) : " The probleizz of the pre-Calnbrial?-Itmosphere." S. Afr. J. Sci., SXIV, pp. 155-172. STACGREGOR,,I. 3PA(1929) : Guide Book, C 20. Intern. geol. Cong. Pretoria, pp. 35-36. XACGREGOR,A. M. (1932) : " Batholiths of Southern Rhodesia." Geol. iiag. Lond., LSIX, pp. 18-29.
XACGREGOR,A, M. (1940) : " -1 pre-Can~brianalgal limestone in Southern Rhodesia." Trans. geol. Soc. S. &*., XLIII, pp. 9-16. XACGREGOR,-1. M. (1946) : '' Sinlpsonite and other Tantalates from Bikita, 9outhern Rhodesia." iifiner. Jfag. Lond., XXVII, pp. 157-165. XACGREGOR,A. M. (1951) : " The primary source of Gold." S. Afr. J. Sci., Vol. 47, Jan. 1951, pp. 157-161.
XACGREGOR,A. &I.: " =Icomparison of the geology of Korthern Rhodesia and Adjoining Territories." Intern., geol. Cong. Lond., 1948. Pt. XIV in the press. SJCSAUGHTON,J. H. 31. : Inte~n.geol. Cong. .Land., 1948. Pt. XIV ill the press. XENNELL.F. P. (1904) : '' Geology of Southern Rhodesia." Rhodesia iWuseum, Spe, iul Report No. 2, Bulswayo. &TENISELL,F. P. (1920) : "Geology of the Sabi Valley, Washonaland." Trans. geol. Soe. S. Afr., XXII, pp. 68-89.
SPENCER,E. (1938) : " The potash-soda felspars, 11. Some Applications to Petrogenesis." -Iliner. Zag., XX'V', pp. 87-118.
TEALE,E. 0. and ~VII,SON,R. C. (1915) : " Portuguese East Africa between the Zambezi River and the Sabi River." Qeogr. Jour. Lond., XLV, pp. 16-45. TPSD.~LE-BISCOE,R. NcI. : " Sotes on a nlonzonitic complex and associated rocks in the Gwanda District, Southern Rhodesia." Trans. geol. Soe. S. Afr., XLI, pp. 83-102.
WAGNER,P. A. (1914) : " The Geology of a Portioii of the Belingwe District of Southern Rhodesia." Trans. geol. Soc. S. Afr., XVII, pp. 39-54. %-ILLEIVISE,J. (1938) : " On the Old Granite of the Vredefort region and some of its associated rocks." Trans. yeol. Soc. S. Afr., XL, pp. 97-99. -ISXIVERSAFLY ADDRESS BY PRESIDEAT lxvii
PUBLICATIONS OF THE SOUTHERN RHODESIAN GEOLOGICAL SURVEY Bulletins 3. The Geology of the Selukwe 31ineral Belt. By H. B. Naufe (Director),B. Lightfoot and the late A. E. V. Zealley (Geologist's),96 pp. 8vo, 14 plates. 1919. Reprinted 1924. Price 7s. 6. l'reliminary Report 011 the Geology of the Cou~lt~ryWest of Sinoia, Loma,gundi District. (Out of print). 7. The Geology of the Enterprise Mineral Belt. By H. B. Maufe. 52 pp. Svo, 4 plates, map. 1920. Reprinted 1935. Price 2s. 9d. 9. The Geology of the Conntry West of Sinoia, Lomagundi District). (Out of priizt). 10. The Geology of the Country West of Mount Darwin. By B. Lightfoot and R. Tyndale-Biscoe. 54 pp. Svo, 6 plates, 1 Fig., 1 Wa,p, 1931. Price 2s. 9d. 11. The Geology of the Country around Lonely Mine, B~ibiDistrict. By A. 31- Bfacgregor. 96 pp. Svo, 7 plates, 3 maps. 1928. Price 6s. 12. The Geology of the Shabani Mineral Belt, Beling-we District. By F. E. Keep* 185 pp. 8vo, 18 plates, 14 figs., map. 1929. Price 7s. 6d. 16. The Geology of the Chroivite and Asbestos Deposits of the Umvukwe Range, Loi~~a- gundi and Mazoe Districts. By F. E. Iieep. 105 pp. Svo, 13 plates, 3 sections. 1930. Price 4s. 17. The Geology of the Country between Gatooma and Battlefields. By A. AT. Macgregor. 144 pp. Svo, 13 plates, S figs, map. 1930. Price 4s. 9d. IS. The Geology of the Couiitry around Shamva, Mazoe District. By 12. Tyndale- Biscoe. 87 pp. Svo, 11 plates, 6 figs, map. 1931. Price 3s. 9d. 19. Interim Report on the Geology of part of the Sa,lisbury Gold Belt. (Out of print). 20. The Geology of the Country around Que Que, Gwelo District. By A. M. Macgregor. 113 pp. 8v0, 13 plates, map. 1932. Price 2s. 6d. 21. The Geology of the Antelope Gold Belt. By A. E. Phaup. 119 pp. 8v0, 5 plates, map. 1932. Price 3s. 3d. 22. The Geology of the Central Part of the 3Iazoe Valley Gold Belt. By R. Tyndale- Biscoe. 108 pp. Svo, 13 plates, map. 1933. Price 3s. 9d. 24. The Geology of the Lower Gwanda Gold Belt. By 9. E. Phaup. 74 pp. Svo, 3 plates, map. 1933. Price 2s. Bd. 27. The Geology of the Cou~t'ryaround Filabusi, hnsiza District. By J. C. Ferguson. 1.79 pp. Svo, 20 plates, map. 1934. Price 5s. 20. Chemical Analyses of the Rocks, Ores and iXinera.1~of Souther11 Rhodesia. By E. Golding (cornpilati011 and descriptions by 9. E. Phanp). 105 pp. 8vo. 1938 (Out of print). 30. The Geology of t'he Count'ry around the Queen's Xine, Bulawayo District. By A. 31. Macgregor, J. C. Ferguson and F. L. Am. 175 pp. Svo, 19 plates, 5 figs., map. 1937. Price 5s. 6d. 31. The Geology of the Country around Hunters Road, Gwelo District. By A. 21. Nacgregor. 78 pp. Svo, 8 plates, map. 1937. Price 2s. 3d. 33. The Geology of the Count,ry around the Junlbo >!tine, 3lazoe District. By J. C. Fergusoii and the late T. H. Wilson. 131 pp. Svo, 7 plates, map. 1937. Price 4s. 6d. 34. The Geology of the Lower Unifuli Gold Belt, Hartley and Lolnagundi Districts. By A. E. Phaup aizd F. 0. S. Dobell. 143 pp. Svo, 11 plates, map. 1938. Price 5s. 35. The Geology of the Country around Bulawayo. By F. L. Amm. 307 pp. 8~0,25 plates, 2 maps. 1940. Price 9s. 9d. 36. The Geology of the Country aaroand Gmanda. BY R. Tyndale-Biscoe. 204 PIJ. Svo, 14 plates, 14 figs., map. 1940. Price 6s. Gd. 37. The G;eology of the Lower Gwelo Gold Belt,. By L. dnlm. 73 Pp. plates¶ map. 1946. Price 3s. 3d. 38. dn oLtlineof the Geological History of Southen1 Rhodesia. BY -4. 3%. Macgregor. 73 pp. 8vo. 1947. Price 2s. 39. ~h~ ~;~~l~~~of the ~oulltryaround Gmelo. By R. Tylldale-Biscoe. 1980. lxviii PROCEEDIKGS OF TEIE GEOLOGICAL SOCIETY OF SOGTIi AFRICA
Short Reports 10. The Geology of the Lonzagundi Mica Deposits. By B. B. 3Iaufe. 8 pp. Svo, 2 figs. 1920. Reprinted 1934. Price Bd. 25. The Geology of the Country around the Korah. Molly and Cnzboe Copper Claims. Lomagundi District. By A. M. Macgregor. 10 pp. Svo, 1 map, 1 fig. 1931. Price 9d. 34. Geology and Xines of the Mashaba District. Bv R. Tyndale-Biscoe. S pp. Svo, map. 1940. Price 6d. 35. ~eolo~yof the Mafungabusi Gold Belt. By A. &I.Xacgregox. 26 pp. 81-0. 2 plates, map. 1941. Price Is. 3d.
Annual Reports of Director A.R.D. (1927), publishes 1928. A.R.D. 1949), published 1950.
TABLE I.
1 AGE IN GEOLOGICAL FORMATIOKS 1 iVIILLIOPIT AKD EVEKTS. 1 YEARS I (Al~rens) ' and others. UPPER PRECAMBRIAN. Erosion and Faulting Zambezi Metamorphism and Granite Intrusion Muscovite. S-Cu-Au. IT. Intrusion of Great Dyke aiid folding CBronle ore. Pt. LOMAGUNDISYSTEN, sedimentary. Unconformity DETVERASSYSTEXI, volcanic and sedimentary Great unconformity MIDDLEPRECAMBRIAN FROXTIERSYSTEM, sedimentary Great Unconformity ARCHAEAX Potash-Adan~ellite. relative age not known E Younger granite D Li etc. &Iatopo granite C Minor 8-Au. Younger gneiss B Ta-Li-Be-Sn. 2Iajor S-An. SHAMVAIANSYSTEM, nlaj nlv sedi- mentary Unconformity Younger gneiss in part (?) BULATVAYANSYSTEM, mainly volcanic Unconformity Older gneiss A SEBAKTVIANSYSTEM, sedimentary and volcanic, with intrusive Magnesian Series Chrome ore I -1SNIVERSARP ADDRESS BY PRESIDEKT lxix
SCBEDULE OF ANALYZED GRANITES. SOUTHERNREGION. -4.-Olde~ Gneiss ? Ko. 45. Qua~terniile from south-west contact of Shabani Serpentiiie. Bull. 12. B.-Younger Gneiss. No. 162. Slightly gneissic granite, I8 miles E.N.E. of Bulawayo. Bull. 35. Xo. 545. Fine massive granite, 9 miles E.S.E. of Turk Mine. Bull. 30. No. 587. Gneissic granite near Lumani Siding. Bull. 36. No. 585. Porphyritic gneiss N.E. of Gwanda. Bull. 36. C.--1lutopo Granite. No. X. Matopo Rills. Grout (1935). No. 539. Quarry 2 miles N.W. of centre of Bulawayo. Bzcll. 35. No. 403. Porphvritic granite, between two belts of schist. 24 miles S.E. of Antelope &'Ii
NORTHERNREGION. A*--Olde~ Gneiss 3' Madziwa batholith. No. 67. Eighteen miles N. of Bindura. No. 285. Mtupme Hill, 13 miles N. of Bindura. No. 500. Xtupwe Hill, 13 miles N. of Bindura. 8.-Younger Gneiss Stocks. Richer in potash than Madziwa granite. No. 219. Borehole Hay Mine, Bii~duraStock. Bull. 22. No. 232. Prince of Wales Mine, Bindura Stock. Bull. 22. So. 503. Prince of Wales Mine, Bindura Stock. B 199. Twelve miles E. of Salisbury. Chishawasha Stock, Poorer in potash than Madziwa granite. No. 244. Cupola 6 miles east of Shamva Mine. Bull. 18. No. 243. Cupola 3 miles S. of Shamva Mine. Bull. IS. No. 487. Granite Farm Cupola 4 miles N. of Jumbo Nine. Btill. 33. ~XX PROCEEDISGS OF THE GEOLOGICAL SOCIETY OF SOUTH AFRICA&
C.-Porphyritic (13fatopo) Grunite. No. 134. Cataclastic granite, 100 feet W. of contact of Great Dyke. BztZl. 16. No. 142. Pink porphyritic granite Marandellas, 40 miles S.E. of Salisbury. No. 590. Porphyritic gneissic granite Kenimore Farm N.E. of Sinoia. No. 596. Porphyritic granite, 26 miles N.E. of Sinoia. No. 654. Porphyritic hornblende-biotite granite, 50 miles W.S.Ti7. of Sinoia. D.-nfassive Fine-Grainecl Granite. B 24. 32 miles W.K.W. of Bindura. B 25. 24 miles W.N.W. of Bindura. 23.-1Various Granites, Relations not knotfin. KO. 101. Called Chiweshe gneissic granite, 24 Ides hy.S.M7. of Bindura. Bull. 10. No. 140. Potash-adamellite. Quarry 1 mile S. of Salisbury. XI. Potash-adamellite, 25 miles 8. of Salisbury. Xo. 237. Lime-tonalite, 25 miles S.E. of Salisb~u.;\-.
TABLE III. DETERAIIKATIONS OF THE AGE OF xIKE SPECI31EXS OF LEPIDOLITE FROM SOUTHERN RHODESIA BY L. H. AKREKS USING; THjE RTJBIDIU?VI/STRONTPUMMETHOD.
(3) Mauve Kop, AIdara Tantalu~nJEine. (dark purple niassive) . . 3,100 3,300 2,900 2,300
Mean 2,950- & 10:~;
(6) A1 Hayat Mine. If miles S.S.E. of Bidara Mine, (white, massive, with microlite) ...... 3,000 2.250
Mean 2,450 f 10% -
(5) Bikita Quarry, S. of A1 Hayat Mine? 14 miles 8. of Mdara Mine (fine massive) ...... 2,300 2,200 1,700 2,400 -
(7) Nigel Claims, 4 mile S. of Mdara Mine (purple: columnar) . . 2,100 2,100 2,000 2,200 1,800 - Mean 2,050F 10% - AXSIVERSAXP ADDRESS BY PRESIDEST lxsi
lliillion yeccys. (9) Augustus Claims, 15 miles K.X.E. of Salisbilry (pale: com- pact 1 ...... *. a e . . . . 2.300
(I) Pope Tantalum Mine, Chisawasha Farm. I1 miles E. of Salisbury (single large crystal, p~wple) ...... 2,000 1,900 2.500 2,100 2.360 Mean 2.150'- 10%
ODZI GOLD BELT . e . . . . *. . s . . 2.000 (4) Duke's Hi!l Clain~s((purple) ...... 2,000 1,950 2,460 1.960 Mean 2,1001- lo?,
WANKIE TIPI'FIELD . . . . *...... 2,050 (2) Lutope Tin Mine (pale mauve) *. . s . . . . 2,100 2,200 2,100 2,100- Mean 2,1001- 107;
ANTELOPEGOLD MINE: 80 miles 8. of Bulavc~ayo . . e s . . 2,100 (8) $ mile E. of main shaft, on line of mine reef . - . . 1>900 1,750 1,900 1,700- Mean 1,900f- 10% P c/o GEOLOGIC&SURVEY, P.O. Box 39, CavsEu;.ir. SALISBURY, S. RHODESIA.
Ixx~~ PROCEEDIKGS OF THE GEOLOGICAL SOCIETY OF SOUTH LFRICA
Dr. S. H. Haughton proposed a vote of thanks to the ret'iring President for his Addsess with these remarks : Nr. President', ladies ancl gentlemen, Xembers of our Society resident in . the Union and South-MTestAfrica should feel a sense of gratitude for the support which Ive receive from our colleagnes who live and work outside our territorial boundaries, those colleagues who comprise a total of 93 out of our 375 ordinary members, or almost 30 per cent. Most partictilaj5y should we feel grateful when one of them, already a recipielzt of the Draper Menlorial Medal, should agree to undertake the onerous task of preparing a Presidential Address of the type to whic,h we have listened this evening. To be able to add to our published work the fraits of Dr. 3Iacgregor's researches, makes us realise more fully that the words " South Africa " in the name of our Society mean something more than the political unit of the Union of South Africa, and that, as a Society, we have a membership that ranges over the whole continent, south of the Sahara, and even beyond the confines of Africa itself. As a Society we can make claims towards being international, just as our science itself is international. 111 his address this evening, our retiring President has dealt with his subject mainly as touching Southern Rhodesia ; but he has recognised that the problem of the sequence of events during the long period of Pre-Cambrian t,ime and the cognate one of the correlation of Pre-Cambrian rocks is one affecting the major part of our continent. To one like myself who has dabbled from tinie to time in the utilisation of fossils for strat'igraphic purposes, it is a regret that the Pre- Cambrian sedimeiits contain no reinains of living organisms that can be used for correlation ; for I do not believe that the Collm~iaand Collerzia-like structures of the calcareous members of the upper Pre-Cambrian sedinients are sufficiently diagnostic to be used for this purpose; We are forced, therefore, to attempt to use other crit'eria far obtaining relative ages and sequences in our endeavour to prepare a picture of the history of our area froin tbe earliest times to the advent of recognisable forms of life upon it. Dr. Maegregor has tonight given us the outlines of this history as he sees it. The criteria he has considered from the view-poiut of their applicability to the problem are the classical ones of superposition of sedinlents and extrusive rocks, relationships between these and the intrusive rocks, .orogenic movements, and degree of metamorphism and the niore recently used one of assessing absolute age by measurements of radioactivity. He has issued a warning against too rigid an adherence to the tenets of uniformitarianism in studying the earth as it was two or more thousands of millions of years ago ; and he has suggested, as I see it, the e~ist~encein those times of a cornparatirely thin crust resting uneasily upon a more mobile sub-crust which rose and fell unevenly, forming great domes between which the crustal rocks accommodated themselves by a, process t'hat approximated to slumping. Progress in the unravelling of the complex history of the earth has been made possible by the patient; collecting of facts into an accumulation of data, and the subsequent formulation of hypotheses desig~~edto combine some or all of the data into a coherent and acceptable whole. Most of these attempts at synthesis deal each with a section of the known facts. Eac,ll hypothesis has t,o be revised as new facts arise ; were it not so, our science would becollie rigid and sterile and there would be no creed for us but firm orthodoxy. We ought, therefore, to be grateful to our retiring President for offering to us tonight something that combines statements of fact with novelty of ideas, and for contributing in a valuable manner to the solution of a problem that is of con- tinental imporatnce. It is to be hoped that there may arise a conjoint edort by a number of geologists, pooling tlzeir local knowledge and their techniques and ideas, which will lead to a clearer understanding of the Pre-Cambrian of Africa than we at present possess. 1have much pleasure, ah. President, in proposing a vote of thanks to Dr. Macgregor for his address, and I trust that it will be published in full.
Dr. L. T. Nel, in seconding the vote of thanks said : 31r. President, ladies and gentlemen, in supporting Dr. Haughton's vote of thanks I should like Dr. Macgregor to know that we are very pleased that he is here with US at the Annual General meeting, and that we consider it a privilege to have been able to listen to one who speaks with authority because of his know- ledge and experience of the subject cbosen by hini for his address. We realise, too, that we would have benefited greatly by his presence at the meetings of Council and the Ordinary General meetings, which however proved impossible, as his home it so remote from this centre. Dr. Macg~egor'saddress is a concise, up-to-date review of Rhodesian Pre- Cambrian geology, which should be of the greatest use to geologists not only of Rhodesia but also of neighboui-ing territories. His previous papers and reports, of which there are many, indicate that since he joined the Rhodesian Geological Survey, of which he subsequently became its Director, he has devoted much attention to the study of the Pre-Cambrian rocks of Southern Rhodesia. In 1927, for example, after pointing out in his paper on (' The Problem of the Pre-Cambrian Atmosphere " that in the Pre-Gambrian sediments there is no evidence of contemporaneous oxidation that later sediments have undergone, he advanced the interesting idea that the Pre-Cambrian atmosphere was rich in carbon dioxide but lacked oxygen-an assumption that could explain the problems connected with the banded ironstones so characteristic of Pre-Cambrian rocks everywhere. His address is niade so stimulating by ideas such as these- explanations that have perhaps not occurred to many of us before. I noted with interest Dr. Macgregor's statement that there is little evidence of dynamic metamorphism in the Archaean formations of Southern Rhodesia and that minerals like kyanite, sillimanite, and staurolite are not recorded from them. Detailed mapping in the belt of country along the Orange river between Upington and the West Coast, has shown on the other hand that these minerals are all well developed in the strongly metaniorphosed Archaean rocks of that area, and that the structural patterr of the Archaean formations appears to be the result of ancient orogeny. Apparently therefore conditions in kchaean times must have varied froin place to place. I mention this to indicate that the Pre-Cambrian formations, which occupy such wide tracts of country in southern Africa, constitute a common field of ~XX~V PBOCEEDIKGS OF THE GEOLOGICAL SOCIETY OF SOVTH AFRICA study and that kindred problems exist north and south of the Limpopo. Eecent detailed mapping of Pre-Cambrian formations, especially in northern and eastern Transvaal and in the north-western Cape, by the Geological Survey of the Union of South Africa provides evidence additional to that so ably collected bj- Dr. AIacgregor and his colleagues on the Geological Survey of Southern Rhodesia. The pooling of knowledge acquired by niembers of these two officiaa institutions, and that provided by other geologists i.11 these and neighbouring territories, must undoubtedly lead to a, better understanding of these ancient rocks. I am sure we are unaninious that Dr. Maegregor has made a very valuable contribution to the knowledge of Pre-Cambrian rocks and have pleasure in seconding the vote of thanks.
Dr. Macgregor thanked Dr. Haughton and Dr. Kel for their kind remarks, and the members present for their appreciation of his Address. PROCEEDIZGS 06.' TIIE GEOLOGICAL SOCIETY OF SOCTH AFRICA ~SXV
Minutes of Ordinary General Meetings of the Society, held in the Main Hall, Kelvin House, 75, Marshall Street, Johannesbnrg. 8th May, 1951, at 8 p.m. Mr. F. A. Venter, President, in the Chair. The Minutes of the Meeting held on the 12th December, 1950, TT-ere confirmed. The following were elected Members of the Society : C. 0. Baker, E. A. L. Gevaerts, and 8. S. J. Hiemstra. The following Student Nembers were elected Members of the Society : A. Bernstein, 8. T. Dyjas, J. P. McMagh, N. Musgrave, I. T. Ralston, E. Shagam, W. Simpson, 0. J. van Straten and P. P. Venter. The Chairman announced that It. A. Edge, R. D. Enzniann, H. H. Hahn, S. Levinkind, 8. J. Malherbe, J. A. Mills, R. J. Ortlepp, E. W. Redelinghuys? N. If. Taylor, J. F. Truswell, E. Ti. van Deventer, and J. J. Viljoen had been admitted as Student Members of the Society. Through the courtesy of the Anglo-Anierican Corporation of South Africa the first part of the technical films dealing v-ith the copper industry of Northern Rhodesia were shown. The following papers were presented : " A Volcanic TTent near Lambert's Bay, Cape Pro-rince," b~ F. Walker. '"he Geology of the Bikita Tin Fields,,' by R. Tyndale-Biscoe. Coal ProVinces in the Natal Coalfields," by J. J. 6. Blignaut. Notice was given that a Special General Meeting .cvould be called for the pur- pose of considering the Council's revised Constitution and By-Laws.
12th June, 1951, at 8 p.m. Mr. F. A. Venter, President, in the Chair. The Minutes of the Meeting held on the 8th May, 1951, were confirmed. The Chairman announced that M. J. Howard, E. L. Aiann, and M. I?. Ovenden had been admitted as Student Members of the Society. Notice was given that a Special General Meeting would be called for the purpose of considering the Council's revised Constitution and By-Laws. The remainder of the films dealing with the copper industry of Korthern Rhodesia were shown, through the courtesy of the Anglo-American Corporation of South Africa.
30th August, 1951, at 8 p.m. Mr. F. A. Venter, President, in the Chair. The President announced with regret the death of Professor G. A. 11-ater- meyer, a member of Council, and President of the Society for the year 1931. IXXT~ PROCEEDI~GS OF TEE GEOLOGICAL SOCIETY OF SOUTH AFRICA
T]le sI\linutes of the Meeting held on the 12th June, 1951, were confirmed. >~~~~~s,J. C. Boshoff, P. J. vaii Zijl, and A. S. Webb were elected Members of the Society. The Chairnlan announced that 8. S. Amdvver liad been admitted as a Student 3Iei11ber of the Society. The following papers were presented :-
'$ The Geoinorphology of the Eastern and Southern Districts of Southern Rhodesia," by L. C. King. " Cyclic Sedimentation in Varved Sediments of the Nailla System in South- Test Africa," by R. Kora and H. Nartin.
" Structure and Metamorphism in the Ohimanii~laiii310untains9 Southern Rhodesia," by Geoffrey Bond. " The Seismicity of South-MTestAfrica," by H. Korn and H. Martin. " The Manganese Ores of Otjosondu, South-West Africa," by J. E. de TTilliers .
11th September, 1951, at 8 p.m. BIr. F. A. Venter, President, in the Chair. The President announced, with regret, the death of AIr. John V. AIulIer, Xeniber of the Society since 1935. The Ninutes of the Meeting held on the 30th August, 1951, were confirmed. The Chairman announced that J. F. Lambert had been admitted as a Student 3Iexzzber of the Society. Dr. S. 6. Davis, of the Hong Kong University, gave a lecture oil '"he scope of Mining for Afinerals in Rong Rong in particular, and South China in General." Xr. A. Frost proposed a vote of thanks to ,Dr. Davis for his interesting lecture.
2nd October, 1951, at 8 p.m. Mr. F. A. Venter, President, in the Chair. The Minutes of the Meeting held on the 11th Sept'ember, 1951, were con- firmed. The following paper was presented :- " Some Results of Radiometric Logging in the Boreholes of the Orange Free State Goldfields and Neighbouring Areas," by D. J. Simpson. PROCEEDIXGS OF THE GEOLOGICAL SOCIETY OF SOUTH AFRICA lxxvii
Minutes of a Special General Meeting of Members, held in the Main Hall, Kelvin House, 75, Marshall Street, Johannesburg, on the. 2nd October, 1951, at 9.10 p.m.
Mr. F. A. Trenter, President, in the Chair. The President' declared the meehing duly constituted. The notice convening the nieeting, which was for the purpose of considering and, if approved, adopting with or without amendment, the revised Constitution and By-Laws, Memorials and Awards of the Soeiet'y, as recon~mendedby hhe Council, copies of which had been circulated to all members, was t>akenas read. The following a!mendments were niacle to the revised Const,itution and By- Laws, Memorials and Awards :- Clau,se 3.03 : The words '(and from the retiring " to be subst'it'nted for t'he word " the " in t,he second line. Clause 3.07 : The words '(for the previous year " to be added at the end of the first paragraph ; the word " list " to be inserted between ('ballot 'j and " shall " in the first. line of the second paragraph. Clause 5.04 : The words " and Proceedings " t'o be inserted after " T~ansactions" in the penultimate line.
Clause 5.11 : The words ('or extracts from them " to be inserted aftfter " papers " in the third line. Clause 7.09 : A new cJause 7-09 to be inserted, this clause to read as follo~~s.- List of Recipients. The list of recipients shall be kept and published in tbe Proceedifiys. Clause 5.02 : This clause to read :- Constitwtion of The Students7 Prizes and Corstorphine Medal Comrnit,tee Wtudents' Prizes shall consist of three members and shall he appointed bg the and Corstorphine C,ouncil at the April Council &Ieet,ingin each year. Nedal Committee Clauses 8.02 These clauses, as drafted by t'he Council, to be renumbered to 8.11 : 8.03 to 8.12.
Clause 9.05 : The words Geographical Society South Bfric,a " in the seconcl line to read South African Geographical Society.':
On the proposal of the President, seconded by Mr. J. H. Taylor, it 13-as resolved that :- 1. The Constitution and By-Laws, Memorials and Awards, as revised by the Council and amended at this meeting, be adopted ; lsxviii PROCEEDIXGS OF THE GEOLOGICAL SOCIETY OF SOUTH AFRICA
2. That Tuesday, 1st January, 1952, hereinafter called the Transfer Date, shall be t8he time fixecl for the introduction of the revised Constitution and Bg-Laws, Slen~orialsand Awards, hereinafter called the Revised Constitution ; 3. That after the Transfer Date, the affairs of the Society shall be governed by the provisioils of the Revised Collstitution which shall supersede the Con- stitution aild Rules at present in force, and hereinafter called the Old Con- stitution ; -I. That these resolutioils are made to facilitate the change-over from the Old Constitution to the Revised Constitution and shall be enforced for that purpose only. The decision of the Council oil any matter incidental to the chaage-over and not provided for in these resolutions nor in either the Revised Constitution or the Old Constitution shall be final and binding 011 all members.
Minutes of a Joint General Meeting with the South African Association for the Advancement of Science and the South African Geographical Society, held in the Main Hall, Kelvin House, 75, Marshall Street, Johannesburg, on the 25th October, 1951, at 8.15 p.m. Prof. R. A. Dart, '\Tice-Presidei~tof the Solltli African Association for the Advancement of Science a-as in the Chair. The Second Alex. L. du Toit Xeniorial Lecture was delivered by Prof. H. H. Read, Professor of Geology at the Imperial College of Science and Technology, London, and was entitled " Xetaniorphisin and Granitisation." Dr. S. H. Haughton, President of the South -4frican Geographical Society proposed a vote of thanks to Prof. Read, which was seconded by Mr. I?. A. Tenter, President of the Geological Society of South Africa.