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THE

JOURNAL OF GEOLOGY

A Semi-Quarterly Magazine of Geology and Related Sciences.


Editors

T. C. CHAMBERLIN

  • R. D. SALISBURY,
    Geographic Geology.
  • J. P. IDDINGS,
    Petrology.
  • R. A. F. PENROSE, Jr.
    Economic Geology.
  • C. R. VAN HISE,
    Pre-Cambrian Geology.
  • C. D. WALCOTT,
    Paleontologic Geology.
  • W. H. HOLMES,
    Archeologic Geology.
GEORGE BAUR,
Vertebrate Paleontology.

Associate Editors

  • SIR ARCHIBALD GEIKIE,
    Great Britain.
  • H. ROSENBUSCH,
    Germany.
  • CHARLES BARROIS,
    France.
  • ALBRECHT PENCK,
    Austria.
  • HANS REUSCH,
    Norway.
  • GERARD DE GEER,
    Sweden
  • GEORGE M. DAWSON,
    Canada.
  • JOSEPH LE CONTE,
    University of California.
  • G. K. GILBERT,
    Washington.
  • H. S. WILLIAMS,
    Yale University.
  • J. C. BRANNER,
    Leland Stanford, Jr. University.
  • G. H. WILLIAMS,
    Johns Hopkins University.
  • I. C. RUSSELL,
    University of Michigan.
  • O. A. DERBY,
    Brazil.

VOLUME I

1893


CHICAGO

The University Press of Chicago