Memorial to Paul Francis Kerr1897—1981

P H IL IP M. BETHKEU.S. Geological Survey, Reston, Virginia 22092

Paul Francis Kerr, Newberry Professor of Mineralogy Emeritus at Columbia University and a former vice- president of the Geological Society of America, died on February 27. 1981, at Stanford University Hospital, Pa lo Alto, California, after a heart attack. He is sur­vived by his two daughters, Ruth Elizabeth Kerr Jakoby of Chevy Chase, Maryland, and Nancy Ann Kerr Del G rande of San Leandro, California, and three grand­sons. His wife, Helen Squire Kerr, predeceased him in September 1978, and a son, Paul Squire Kerr, died while a young man. With Paul F. K err’s death, theprofession lost one of its most successful educator-administrator-scholars, and his former students lost their most steadfast teacher-counselor-mentor-friend.

Paul Kerr was bo rn January 12, 1897, in Hemet, California. He entered Occidental College in the fall o f 1915, using savings acquired th rough work in the fields and orchards of the San Jacin to Valley. He financed the later part o f his college career by an assistantship in chemistry. Although his studies in chemistry and mathematics were interrupted by a brief period of military service, he graduated with his class in June 1919. The following fall he entered Stanford University with an assistantship to Professor Theodore Hoover, brother of the President. Althoughhe began his studies in mining engineering, he soon switched to geology and came underthe tutelage o f Professor Austin Flint Rogers. Rogers introduced him to Professor D. L. W ebster o f the Physics Department, with whom he constructed a multiple X-ray diffraction unit, which he proceeded to use in work for his doctoral dissertation entitled “The Determ ination of Opaque Ore Minerals by X-ray Diffraction Patterns.” This work, coming only a few years after the demonstrations by Debye and Scherrer in Germany and by Hull in America of the usefulness of the powder diffraction method, was one of the pioneering applications of the technique to problems of mineral identification.

U pon receiving his Ph.D. in 1923, Kerr replaced Rogers for the fall term at Stanford while Rogers was on leave. Kerr was offered a temporary position as lecturer in mineralogy at Columbia for the spring term and moved to New York to begin what was to be a 41-year association. Shortly after K err’s arrival at Columbia, Professor Luquer, w hom he was assisting, suffered a severe heart attack, and Kerr took over the responsi­bilities of the mineralogy program; shortly thereafter, he became a permanent member of the faculty, rising to the rank of full professor by 1940. He became Newberry Professor of Mineralogy in 1959. After his retirement from Columbia in 1965, the Kerrs returned to California where he was a consulting professor at Stanford until 1977. He remained active in research, advising graduate students and consulting until the time of his death. The final paper in his bibliography. “ Reminiscences in Applied Mineralogy,” was presented for him by D. M. Hausen as the keynote address to the American Institute of Mining. Metallurgical and Petroleum Engineers Symposium on “Process Mineralogy: Extractive Metallurgy. Mineral Exploration, Energy Resources” in Chicago just one day

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before his death. His final illness, coming just a few days before the symposium, prevented him from presenting the paper himself.

Paul K err’s scholarly interests had as their underlying them e the application of min­eralogy to problem s of geology, engineering, and industrial processing. Indeed, his many con tribu tions in that area led D. M. Hausen and W. C. Petruk to refer to him, in an editors’ footnote to his final paper, as the “ Father of Applied M ineralogy in this country .” A lthough Paul K err’s researches were as broad as mineralogy itself, three main areas particularly captured his attention early and held it for the duration of his career: clay mineralogy, the mineralogy of ore deposits, and the development of mineralogical techniques.

K err’s fascination with clay minerals began early in his career when C. S. Ross sent him about a dozen samples on which to test the usefulness of X-ray diffraction techniques in clay m ineralogy. K err’s results confirmed R oss’s conclusions based on optical studies and thus began a long and fruitful association between the two. Their collaborative studies provided the first firm bases for distinction between clay-mineral species and culm inated in the first m odern classification of clay minerals. It was natural that Paul K err should assume the leadership of the American Petroleum Institu te’s Project 49: Clay M inerals S tandards program , which provided a set of clay-mineral standard samples from a large num ber of “ type” localities. For each locality, a set of physical, chemical, optical. X-ray, and o ther data was collected by 23 specialists w orking in 10 different laboratories.

Paul K err’s interest in clay minerals was not limited to systematic mineralogy, however, but extended to the application of clay mineralogy to the solution of a variety o f geologic problems. He was especially concerned with (1) the “quick clays” and their role in landslides and slope stability, an interest that occupied him particularly during the last years o f his career, and (2) the clay m ineralogy o f hydrotherm al alteration haloes, an application to one of his other great loves, ore deposits. The classic alteration studies of the S anta R ita and Silver Bell porphyry copper deposits by Kerr and his students formed only a part of K err’s contribution to the understanding of the genesis o f ore deposits. His studies of tungsten m ineralization in the western United States, which began in the mid- 1930s with a comprehensive investigation at Mill City, Nevada, culm inated in M em oir 15 of the Geological Society o f America, Tungsten M ineralization in the United States, which was published in 1946. The study of the uranium m ineralization at Marysvale, U tah, by Kerr and his students was published in 1957 as Special P aper 64 of the Society. K err’s interest in uranium mineralization dated back to the early days of the M anhattan Project, when the interest in the availability o f raw materials caused him to be sent to the K atanga district of what was then the Belgian Congo, where, upon his recom m endation, and that of Philip M erritt, the famous Shinkolobwe Mine was reopened. Sim ilar missions sent him to the E ldorado Mine at Great Bear Lake in the N orthw est Territories, C anada, and to many localities in the United States. A long association with the U.S. Atomic Energy Com m ission followed, leading to a series of studies by Kerr and his students on various aspects o f uranium m ineralization in and around the C olorado Plateau. K err’s involvement with uranium was only in part as a researcher. In 1945 he was selected by the Carnegie Endowm ent for International Peace to chair a commission charged with investigating problem s associated with the international inspection of fissionable m ate­rials, and in 1955 he set up, on behalf of the United N ations, a program on raw materials for the First International Conference on the Peaceful Uses of A tomic Energy, held in Geneva, and edited the volume resulting from that program.

The techniques of m ineral analysis were one of Paul K err’s m ajor interests, starting with his thesis project on the application of X-ray diffraction techniques to the identifica­tion of opaque minerals. His textbook, w ritten with his m entor Rogers, was published in

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1933 as Thin-Sectiort M ineralogy ; the revised edition was retitled Optical M ineralogy and was published in 1942. The th ird and fourth editions were extensively revised and published under K err’s nam e alone in 1959 and 1977, respectively. G enerations of students, many of them now retired, were introduced to the use of the petrographic m icroscope by this text, and it still continues to sell at the rate o f well over a thousand copies per year! A lthough differential therm al analysis (D TA ) had been applied to clay m inerals as far back as 1913 and was widely utilized in the 1940s, the systematic studies o f K err and his co-w orkers, along with those o f R alph Grim and of Toshio Sudo, gained acceptance of the method in clay-mineral studies. K err and his students made significant con tribu tions to the developm ent and im provem ent o f D TA instrum entation . With J . Lawrence Kulp, he designed a m ultiple D TA unit in which a num ber o f samples could be analyzed simultaneously under the same heating program , a technique that proved particularly useful in the study of clays. W ith O tto C. Kopp, he adapted the apparatus to provide fo r the analysis o f m aterials, such as sulfides, which yielded corrosive decomposi­tion products, an adap ta tion which he and J . A. D unne later im proved. Always on the lookout fo r new m ethods tha t could be applied to mineralogical problem s, K err was am ong the first to im plem ent such techniques as infrared and ultraviolet spectroscopy and X -ray fluorescence in his laboratory.

K err’s contributions to system atic m ineralogy included his efforts with C. S. Ross in straightening out the nom enclature of clay mineralogy, the first description (with others) o f the new minerals alleghanyite, cattierite, dickite, hydrotungstite, sengierite, tungo- m elane, um ohoite, and vaesite, and the publication o f a prodigious am ount of definitive da ta on a wide variety of minerals.

It is simply not possible to docum ent herein all the applications of mineralogy to which Paul K err contributed. He had a continuing interest in m any o ther areas including gems and gemology, the so-called spark plug m inerals, such as dum ortierite, and the m ineralogy o f saline deposits. His bibliography boasts m ore than 250 entries, only the m ost im portant o f which are listed in the Selected Bibliography below. A complete bibliography through 1965, compiled by M arjorie H ooker, is published in the American Mineralogist, volume 50, no. 10, 1965, p. 1532-1545, and is updated in O tto K opp’s Memo­rial in the M ay-June issue o f volum e 69 o f the Am erican Mineralogist. As impressive as Paul K err’s contributions to science through teaching and research are, they tell only part o f the story. His exceptional abilities as an adm inistrato r naturally brought to him many responsibilities, both at C olum bia and within several scientific societies. Kerr took over as chairm an of the D epartm ent of Geology upon the illness and retirem ent o f Douglas Johnson in 1942; he retained the position until 1950. He was largely responsible for the acquisition by C olum bia of Torrey Cliff, the estate o f Thom as W. Lam ont, on which site the L am ont-D oherty Geological O bservatory now stands. His additional service to C olum bia is docum ented in the m inutes o f the innum erable com m ittees on which he served and which he often chaired. Kerr served as vice-president o f the Geological Society o f America; as president, secretary, and councillor o f the M ineralogical Society of A m erica; as vice-president of the American Association for the A dvancem ent o f Science; and as chairm an of that society’s Section of G eography and Geology. He also served as chairm an of the Section o f Geology of the New York Academy of Sciences and as p resident of the K appa C hap ter of the Society of the Sigma Xi, o f the Faculty Club of C olum bia University, and of the New York Mineralogical Club.

P aul K err received m any honors and awards in recognition of his outstanding con­tributions. He was a mem ber of Phi Beta Kappa and the Society o f the Sigma Xi. In 1957 he was aw arded the K. C. Li medal for his contributions to the geology and mineralogy of tungsten deposits, and he was aw arded an honorary doctorate by his alm a mater.

4 THF. GF.OI.O CiICAI. S O C I E T Y O F A M E R I C A

O ccidental College, in I960. He was the third recipient of the D istinguished M em ber A ward of the Clay M inerals Society in 1970, and in 1972 was elected an honorary m em ber of the M ineralogical Society of Great Britain. Perhaps the recognition that pleased him most was the assembly of more than 250 colleagues, form er students, and friends at a reception and dinner in his honor on the occasion o f his retirem ent from C olum bia in 1965. At that time, he was presented a manuscript copy of the festschrift volum e of the Am erican M ineralogist (volume 50, no. 10, October 1965) dedicated to him by his friends and form er students. In that volume, compiled and edited through the efforts o f the late Ralph J. Holmes and W illiam .1. Croft, tributes by Holmes, Donald Fraser, M arjorie H ooker, Clarence S. Ross, and W aldem ar Schaller gave special insights into Paul K err’s life and career. They have been a fruitful source of inform ation for this memorial.

Paul K err’s contributions to our science have been enorm ous. All o f us are in his debt, but none so much as his form er students; most of us owe our careers to him, and all of us were the beneficiaries o f his obvious and deep-felt concern for our well-being and our progress. This concern resulted in generations of students referring to him as “ Pappy .” a nicknam e that he knew had its roots in respect and affection, and one that bespoke most eloquently of the unique and special relationship tha t he established with his students.

S E L E C T E D B IB L IO G R A P H Y O F P. F . K E R R1924 The determ ination of opaque ore minerals by x-ray diffraction patterns: Economic

Geology, v. 19, p. 1-34.____ A simple rotation apparatus: American M ineralogist, v. 9, p. 169-171.1925 (and Schenck, H. G.) Active thrust faults in San Benito County, California:

Geological Society of America Bulletin, v. 36, p. 465-494.____ (and Cabeen, C. K.) Electrical conductivity of ore minerals: Econom ic Geology,

v. 20, p. 729-737.1926 The significance of strain structure in quartz from D ucktow n, Tennessee: American

M ineralogist, v. 11. p. 206-209.1928 Significance of the M atilija overturn: Geological Society of America Bulletin, v. 39,

p. 1087-1102.1929 An artificial gemstone isom orphous with spinel: American M ineralogist, v. 14,

p. 259-264.1930 (with Ross. C. S.) Dickite, a kaolin mineral: American M ineralogist, v. 15, p. 34-39.____ (with Ross, C. S.) The kaolin minerals: American Ceramic Society Journal, v. 13,

p. 151-160.1931 (with Ross, C. S.) The clay minerals and their identity: Journal of Sedim entary

Petrology, v. 1, p. 55-65.____ Bentonite from V entura. California: Economic Geology, v. 26, p. 153-168.____ (with Ross, C. S.) The kaolin minerals: U.S. Geological Survey Professional

Paper 165, p. 151-176.1932 (with Ross. C. S.) The manganese minerals from a vein near Bald Knob. North

Carolina: American M ineralogist, v. 17, p. 1-18.____ M ontm orillonite or smcctite as constituents of fuller’s earth and bentonite:

American M ineralogist, v. 17, p. 192-198.____ The occurrence of andalusite and related minerals at White M ountain, California:

Economic Geology, v. 27. p. 614-643.1933 (with Rogers. A. F.) Thin-section mineralogy: New York. M cGraw-Hill Book Co.,

311 p.

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1934 Geology o f the tungsten deposits near Mill City, Nevada: University o f Nevada Bulletin 28, no. 2, 46 p.

____ (with Ross, C. S.) Halloysite and allophane: U.S. Geological Survey ProfessionalPaper 185, p. 135-148.

1935 (and Jenney, P.) The dum ortierite-andalusite mineralization at O reana, Nevada: Economic Geology, v. 30, p. 287-300.

____U-galena and uraninite in Bedford, New York cyrtolite: American Mineralogist,v. 20. p. 443-450.

____ (with Bray, R. H., and Grim, R. E.) Application of clay m ineral technique toIllinois clay and shale: Geological Society of America Bulletin, v. 46, p. 1909-1926.

1936 (and C am eron, E. N.) Fuller’s earth o f bentonitic origin from Tehachapi, Calif.: American M ineralogist, v. 21, p. 230-237.

____ The tungsten m ineralization at Silver Dyke, Nevada: University o f N evada Bulle­tin 30, no. 5, 67 p.

1937 A ttapulgus clay: American M ineralogist, v. 22, p. 534-550.1938 (with Burke, H. E.) The nature of mineral particles in sputum and ash of the lungs

of silicotics: Jou rnal of Industrial Hygiene and Toxicology, v. 20, p. 535-555.____ Tungsten m ineralization at O reana, Nevada: Economic Geology, v. 33, p. 390-427.____ A decade of research on the nature of clay: American Ceramic Society Journal,

v. 21, p. 267-286.1940 A pinitized tu ff of ceram ic im portance: American Ceramic Society Journal, v. 23.

p. 65-71.____ Tungsten-bearing manganese deposit at G olconda, Nevada: Geological Society

of America Bulletin, v. 51, p. 1359-1389.1941 (with Rogers, A. F.) Optical mineralogy (2nd edition): New York, M cGraw-Hill

Book Co., 390 p.1942 (and Erichsen, A. I.) Origin of the quartz deposit at Fazenda Pacti, Brazil:

American M ineralogist, v. 27, p. 487-499.1944 (and Young, F.) H ydrotungstite, a new m ineral from O ruro, Bolivia: American

M ineralogist, v. 29, p. 192-310.1945 (and Holmes, R. J.) X-ray study of the tantalum mineral simpsonite: Geological

Society of A merica Bulletin, v. 56, p. 479-504.____ C attierite and vaesite; new Co-Ni minerals from the Belgian Congo: American

M ineralogist, v. 30, p. 483-497.____ (and Holmes. R. J ., and Knox. M. S.) Lattice constants in the pyrite goup:

A merican M ineralogist, v. 30, 498-504.1946 Tungsten m ineralization in the United States: Geological Society of America

M em oir 15, 241 p.____ K aolinite after beryl from A lto do Giz, Brazil: American M ineraologist, v. 31.

p. 435-442.1947 A lteration studies: American M ineralogist, v. 32. p. 158-162. Presidential Address,

27th Annual Meeting. Mineralogical Society of America, 1946.____ (and Kulp, J. L.) Differential therm al analysis of siderite: American M ineralogist,

v. 32, p. 678-680.1948 (and Kulp, J. L.) M ultiple differential therm al analysis: American M ineralogist,

v. 33, p. 387-419.1949 (with Vaes, J. F.) Sengierite; a prelim inary description: American Mineralogist,

v. 34, p. 109-120.____ (with Kulp, J. L.) Im proved differential thermal analysis apparatus: American

M ineralogist, v. 34, p. 839-845.

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1950 (and Kulp, J. L., Patterson, C. M., and W right, R.) H ydrotherm al alteration at Santa Rita, New Mexico: Geological Society of America Bulletin, v. 61,p. 275-347.

____ (and Graf, D. L.) Trace element studies, Santa Rita. New Mexico: GeologicalSociety of America Bulletin, v. 61, p. 1023-1052.

1951 (and H olland, H. D.) D ifferential therm al analysis of davidite: American M ineralo­gist, v. 36, p. 563-572.

____ (with Kulp, J. L., and Kent, P.) Therm al study of the Ca-M g-Fe carbonate minerals:American M ineralogist, v. 36, p. 643-670.

____ A lteration features at Silver Bell, Arizona: Geological Society of America Bulletin,v. 62, p. 451-480.

1952 (and Kulp, J. L.) Pre-Cam brian uraninite. Sunshine mine, Idaho: Science, v. 115, no. 2978, p. 86-88.

1955 H ydrotherm al alteration and weathering, in C rust of the earth—a symposium: Geological Society of America Special Paper 62. p. 525-543.

1956 The natural occurrence of uranium and thorium : In ternational Conference on the Peaceful Uses of A tomic Energy, Geneva, 1955, Proceedings. Geology of uranium and thorium , v. 6, p. 5-59.

____ Rock alteration criteria in the search for uranium : International Conference onthe Peaceful Uses o f A tomic Energy, Geneva, 1955, Proceedings, Geology of uranium and thorium , v. 6, p. 679-684.

____ (and Kelley, D. R.) U rano-organic ores of the San Rafael Swell, Utah: EconomicGeology, v. 51, p. 386-391.

1957 (and Brophy, G. P., Dahl, H. M ., Green, J., and W oolard, L. E.) Marysvale, Utah uranium area—geology, volcanic relations and hydrotherm al alteration: Geological Society of America Special Paper 64, 212 p.

____ (and Bodine, M. W., Jr ., Kelley, D. R., and Keys, W. S.) Collapse features. TempleM ountain uranium area, Utah: Geological Society of America Bulletin, v. 68, p. 933-981.

____ (with Kopp, O. C.) Differential therm al analysis o f sulfides and arsenides: AmericanM ineralogist, v. 42, p. 445-454.

____ (with Kelley, D. R.) Clay mineralogy and ore. Temple M ountain, Utah: GeologicalSociety of America Bulletin, v. 68, p. 1101—1116.

1958 Criteria of hydrotherm al replacement in Plateau uranium strata: Second United N ations International Conference on the Peaceful Uses of Atomic Energy,Geneva, 1958, Proceedings, v. 2, Survey of raw materials resources, p. 330-334.

____ (and H am ilton, P. K.) Chrom e mica-clay. Temple M ountain, Utah: AmericanM ineralogist, v. 43, p. 34-47.

____ (with Kelley, D. R.) U rano-organic ores at Temple M ountain, Utah: GeologicalSociety of America Bulletin, v. 69, p. 701-755.

____ U ranium emplacement in the C olorado Plateau: Geological Society of AmericaBulletin, v. 69, p. 1075-1111.

____ (with Kopp, O. C.) Differential therm al analysis of sphalerite: American M ineralo­gist. v. 43, p. 732-748.

____ (with Kopp. O. C.) Differential therm al analysis of pyrite and marcasite: AmericanM ineralogist, v. 43, p. 1079-1097.

1959 (with Kopp, O. C.) Differential therm al analysis o f evaporites: American M ineralo­gist. v. 44. p. 674-679.

____ (with H am ilton. P. K.) Umohoite from Cam eron. Arizona: American M ineralogist,v. 44, p. 1248-1260.

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1960 (with H uang, C. K.) Infrared study of the carbonate minerals: American M ineralo­gist, v. 45, p. 311-324,

------ (with Molloy, M. W.) X-ray spectrochem ical analysis; an application to certainlight elements in clay minerals and volcanic glass: American M ineralogist, v. 45, p. 911-936.

1961 (with D unne, J. A.) D ifferential therm al analysis o f galena and clausthalite: American M ineralogist, v. 46, p. 1-11.

------ (with B arrington, J.) U ranium mineralization at the M idnite mine, Spokane,W ashington: Economic Geology, v. 56, p. 241-258.

------ (with A bdel-G awad, A. M.) U rano-organic m ineral association: AmericanM ineralogist, v. 46, p. 402-419.

------ (with Molloy, M. W.) D iffractom eter patterns o f A .P.I. reference clay minerals:American M ineralogist, v. 46, p. 583-605.

------ (with Bollin, E. M.) D ifferential therm al pyrosynthesis: American M ineralogist,v. 46, p. 823-858.

------ (and B arrington, J.) Clays o f deep shale zone, Caillou Island, Louisiana: AmericanA ssociation of Petroleum Geologists Bulletin, v. 45, p. 1697-1712.

------ (with Barrington, J.) Breccia pipe near Cam eron, Arizona: Geological Societyof America Bulletin, v. 72, p. 1661-1674.

1962 (with Barrington, J.) A lteration effects at Tuba Dike, Cam eron, Arizona: Geological Society of America Bulletin, v. 73, p. 101-112.

------ (with Molloy, M. W.) T ushar uranium area, Marysvale, Utah: Geological Societyof America Bulletin, v. 73, p. 211-235.

------ (with Adler, H. H.) Infrared study of aragonite and calcite: American Mineralogist,v. 47, p. 700-717.

1963 (and Thom as, A. W., and Langer, A. M.) The nature and synthesis of ferrimolyb- dite: American M ineralogist, v. 48, p. 14-32.

------ (with Adler, H. H.) Infrared absorption frequency trends fo r anhydrous norm alcarbonates: American M ineralogist, v. 48, p. 124-137.

____ (with Abdel-Gawad, A. M.) A lteration of Chinle siltstone and uranium emplace­m ent, Arizona and Utah: Geological Society o f America Bulletin, v. 74, p. 23-46.

____ (with Bassett, W. A., Schaeffer, O. A., and Stoenner, R. W.) Potassium -argondating of the late Tertiary volcanic rocks and m ineralization of Marysvale, Utah: Geological Society of A merica Bulletin, v. 74, p. 213-220.

----- (with Omori, K.) Infrared studies o f saline sulfate minerals: Geological Societyo f America Bulletin, v. 74, p. 709-734.

------ (with Adler, H. H.) Infrared spectra, symmetry and structure relations o f somecarbonate minerals: American M ineralogist, v. 48, p. 839-853.

____ (with Barrington, J.) Collapse features and silica plugs near Cam eron, Arizona:Geological Society of America Bulletin, v. 74, p. 1237-1258.

------ (and W ilcox, J. T.) Structure and volcanism. G rants Ridge area: New MexicoBureau o f Mines and M ineral Resources M em oir 15, p. 205-213.

1964 (and Jacobs, M. B.) Argillic alteration and uranium emplacement on the C olorado Plateau, in Clays and clay minerals: Twelfth N ational Conference on Clays and Clay M inerals, Proceedings, p. 111-128, London. Pergam on Press; New York, M acm illan Company.

1965 (with Adler, H. H.) V ariations in infrared spectra, molecular symmetry and site symmetry of sulfate minerals: American M ineralogist, v. 50, p. 132-147.

____ (with Jacobs, M. B.) H ydrotherm al alteration along the Lisbon Valley fault zone,San Juan County, Utah: Geological Society o f America Bulletin, v. 76, p. 423-440.

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1965 (with Liebling, R. S.) O bservations on quick clays: Geological Society of America Bulletin, v. 76, p. 853-878.

------ (with Geise, R. F.) The crystal structures of ordered and disordered cobaltite:American M ineralogist, v. 50, p. 1002-1014.

------ (with Megrue, G. H.) A lteration o f sandstone pipes. Laguna, New Mexico: G eo­logical Society of America Bulletin, v. 76. p. 1347-1365.

____ (with Guven, N.) Selected G reat Basin playa clays: American M ineralogist, v. 51,p. 1056-1067.

____ (with Guven, N.) W eathering effects on the structures o f mica-type clay minerals:American M ineralogist, v. 51, p. 858-874.

____ (with Langer, A. M.) Mojave playa crusts: Physical properties and m ineral content:Jou rna l of Sedim entary Petrology, v. 36, p. 377-396.

____ (with Nash, J. T.) Geologic lim itations of the age of uranium deposits in theJackpile sandstone. New Mexico: Economic Geology, v. 61, p. 1283-1287.

1967 (with Langer, A. M.) Evaluation o f kaolinite and quartz differential therm al curves with a new high tem perature cell: American M ineralogist, v. 52, p. 509-523.

____ (with Rooney, T. P.) M ineralogic nature and origin of phosphorite, BeaufortC ounty, N orth Carolina: Geological Society of America Bulletin, v. 78, p. 731-748.

1968 (with D avidson, D. M ., Jr.) U ranium -bearing veins in plateau strata, Kane Creek, Utah: Geological Society of America Bulletin, v. 79, p. 1503-1523.

____ (and Drew, I. M.) Recent quick clay studies, 5. Quickclay slides in the U.S.A.:Engineering Geology, v. 2. p. 215-238.

____ (with Gavasci, A. T.) U ranium em placement at G arnet Ridge, A rizona: EconomicGeology, v. 63, p. 859-876.

____ (with Hausen, D. M.) Fine gold occurrence at Carlin, Nevada, in R idge, J. D ., ed..Ore deposits o f the United States, 1933-1967 (G raton-Sales Volume): The American Institu te of Mining, M etallurgical and Petroleum Engineers, Inc., New York, v. 1, p. 908-940.

____ (with Neal, J. T., and Langer, A. M.) G iant desiccation polygons o f G reat BasinPlayas: Geological Society of America Bulletin, v. 79, p. 69-90.

1969 (and Drew, I. M.) Clay mobility, Portuguese Bend, California: C alifornia Division of Mines and Geology, Special R eport 100, p. 3-16.

1970 (and Drew, I. M., and R ichardson, D. S.) M ud volcano clay, T rin idad, West Indies: American Association o f Petroleum Geologists Bulletin, v. 54, p. 2101-2110.

____ (with Gornitz, V.) U ranium m ineralization and alteration. O rphan M ine, G randC anyon, Arizona: Economic Geology, v. 65, p. 751-768.

1971 (and S troud, R. A., and Drew, I. M.) Clay mobility in land slides, V entura, Cali­fornia: American A ssociation of Petroleum Geologists Bulletin, v. 55, p. 267-291.

1972 (and Drew, I. M.) Clay mobility in Ridge R oute landslides, Castaic, California: American A ssociation of Petroleum Geologists Bulletin, v. 56. p. 2168-2184.

____ (with Haji-Vassiliou, A.) U ranium -organic m atter association at La Bajada,New Mexico: Economic Geology, v. 67, p. 41-54.

1973 (with Haji-Vassiliou, A.) Analytic data on nature of urano-organic deposits: American Association of Petroleum Geologists Bulletin, v. 57, p. 1291-1296.

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