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JOURNAL OF GEOLOGY

A Semi-Quartet ly Magazine of Geology and
Related Sciences.

Editors

T. C. CHAMBERLIN

R. D. SALISBURY, C. R. VAN HISE,

Geographic Geology, Pre-Cambrian Geology.

J. P. IDDINGS, C. D. WALCOTT,

Petrology. Paleontologic Geology.

R. A. F. PENROSE, Jr. W. H. HOLMES,

Economic Geology. Arckeologic Geology.

GEORGE BAUR,

/ 'ertebrate Paleontology.

Associate Editors

SIR ARCHIBALD GEIKIE, JOSEPH LE CONTE,

Great Britain. University of California.

H. ROSENBUSCH, G. K. GILBERT,

Germany. Washington.

CHARLES BARROIS, H. S. WILLIAMS,

France. Yale University.

ALBRECHT PENCK, |. C. BRANNER,

Austria. /.eland Stanford, fr. University.

HANS REUSCH, G. H. WILLIAMS,

Norway. fohns Hopkins University.

GERARD DE GEER, I. C. RUSSELL,

Sweden.. University of Michigan.

GEORGE M. DAWSON, O. A. DERBY,

Canada. Brazil.

VOLUME I

1893

CHICAGO

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Contents Of Volume I.

On The Pre-cambrian Rocks Of The British Isles. Sir Archibald

Geikie I

Are There Traces Of Glacial Man In The Trenton Gravels?

W. H. Holmes 15

Geology As A Part Of A College Curriculum. H. S. Williams. . 38

The Nature Of The Englacial Drift Of The Mississippi Basin.

T. C. Chamberlin. .......... 47

Studies For Students: Distinct Glacial Epochs and the Criteria for their

Recognition. Rollin D. Salisbury 61

Editorials 85

Reviews: On the Glacial Succession in Europe, James Geikie; by Rollin D.

Salisbury. ............ 90

Analytical Abstracts Of Current Literature: The Sub-Glacial Ori-

gin of Certain Eskers; William Morris Davis. Studies in Structural

Geology; Bailey Willis. The Catskill Delta in the Post-Glacial

Hudson Estuary; William Morris Davis. Geological Survey of Ala-

bama—Bulletin 4; C. Willard Hayes. The Correlation of Moraines

with Raised Beaches of Lake Erie; Frank Leverett. The Climate of

Europe during the Glacial Epoch; Clement Reid. On the Glacial

Period and the Earth Movement Hypothesis; James Geikie. . . 95-100

Acknowledgments 101

NUMBER II.

An Historical Sketch Of The Lake Superior Region To Cambrian

Time. C. R. Van Hise 113

The Glacial Succession In Ohio. Frank Leverett. ;129

Traces Of Glacial Man In Ohio. W. H. Holmes 147

The Volcanic Rocks Of The Andes. Joseph P. Iddings. . . 164

On The Use Of The Terms Poikilitic And Micropoikilitic In Petrog-

Raphy. George H. Williams 176

Studies For Students. The Making of the Geological Time-Scale. H.

S. Williams. 180

Editorials 198

Theory Of The Origin Of Mountain Ranges. Joseph Le Conle. . 542

On The Migration Of Material During The Metamorphism Of

Rock Masses. Alfred Darker. 574

The Cordili.eran Mesozoic Revolution. Andrew C. Lawson. . 579

Sketch Of The Present State Of Knowledge Concerning The Basic

Massive Rocks Of The Lake Superior Region. W. S. Bayley. . 587

A Study In Consanguinity Of Eruptive Rocks. Orville A. Derby. 597

A Dissected Volcano Of Crandali. Basin, Wyoming. Joseph P.

hidings 606

Notes On The Lead And Zinc Deposits Of The Mississippi Valley

And The Origin Of The Ores. Arthur Winslow. . . . 612

Editorials. 620

Reviews: Eruptive Rocks of Montana; Waldemar Lindgren. A Sodalite-

Syenite and other Rocks from Montana; W. Lindgren. Acmite-

Trachyte from the Crazy Mountains, Montana ; J. E. Wolff, by Joseph

P. hidings. 634

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